Additional Financial Information Disclosure [Abstract] Additional Financial Information Disclosure [Abstract] Components of Other Items, Net Supplemental Income Statement Disclosure [Table Text Block] Supplemental Income Statement Disclosure [Table Text Block] Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments [Member] Operating Segments [Member] Corporate [Member] Corporate, Non-Segment [Member] Segment Reconciling Items [Member] Segment Reconciling Items [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Entertainment [Member] Entertainment Segment [Member] Entertainment Segment Cable Networks [Member] Cable Networks Segment [Member] Cable Networks Segment Publishing [Member] Publishing Segment [Member] Publishing Segment Local Media [Member] Local Media Segment [Member] Local Media Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Operating income (loss) Operating Income (Loss) Restructuring charges Restructuring Charges Corporate matters Other Corporate Matters, Costs Other Corporate Matters, Costs Programming charges Programming Charges Programming Charges Other operating items, net Other Operating Income Interest expense Interest Expense Interest income Interest Income, Other Loss on early extinguishment of debt Gain (Loss) on Extinguishment of Debt Pension settlement charges Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement Other items, net Other Nonoperating Income (Expense) Earnings from continuing operations before income taxes and equity in loss of investee companies Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Equity in loss of investee companies, net of tax Income (Loss) from Equity Method Investments Net earnings from continuing operations Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Net loss from discontinued operations, net of tax Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Net earnings Net Income (Loss) Attributable to Parent Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Corporate/Eliminations [Member] Corporate and Eliminations [Member] Intersegment Eliminations [Member] Intersegment Eliminations [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States [Member] UNITED STATES International [Member] Non-US [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues Revenue from Contract with Customer, Excluding Assessed Tax Quarterly Financial Information Disclosure [Abstract] Quarterly information [Table] Corporate and Eliminations [Member] Operating Segments And Corporate Non Segment [Member] Operating Segments And Corporate Non Segment [Member] Operating Segments And Corporate Non Segment [Member] Disposal Group Classification [Axis] Disposal Group Classification [Axis] Disposal Group Classification [Domain] Disposal Group Classification [Domain] Discontinued Operations [Member] Discontinued Operations [Member] Disposal Group Name [Axis] Disposal Group Name [Axis] Disposal Group Name [Domain] Disposal Group Name [Domain] CBS Television City [Member] CBS Television City [Member] CBS Television City [Member] CBS Radio [Member] CBS Radio [Member] CBS Radio [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost [Member] Accounting Standards Update 2017-07 [Member] Net earnings (loss) Basic net earnings (loss) per common share: Earnings Per Share, Basic [Abstract] Net earnings from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Basic Share Net earnings (loss) (in dollars per share) Earnings Per Share, Basic Diluted net earnings (loss) per common share: Earnings Per Share, Diluted [Abstract] Net earnings from continuing operations (in dollars per share) Income (Loss) from Continuing Operations, Per Diluted Share Net earnings (loss) (in dollars per share) Earnings Per Share, Diluted Weighted average number of common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic weighted average number of common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted weighted average number of common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Selected quarterly financial information Selected Quarterly Financial Information [Abstract] Reversal of valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Net loss on disposal Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax Market value charge (gain) Disposal Group, Including Discontinued Operation, Market Value Adjustment Disposal Group, Including Discontinued Operation, Market Value Adjustment Pension settlement charges Provisional income tax charge Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Provisional Income Tax Expense (Benefit) Statement of Cash Flows [Abstract] Cash and cash equivalents of discontinued operations Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Restricted cash Restricted Cash and Cash Equivalents Investments, All Other Investments [Abstract] Schedule of Equity Method Investments [Table] Schedule of Equity Method Investments [Table] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] The C W [Member] The C W [Member] POP [Member] POP [Member] POP formerly known as TVGN, TV Guide Network AMC Networks Inc JV [Member] Joint Venture With AMC Networks One [Member] AMC Networks Inc Other JV [Member] Joint Venture With AMC Networks Two [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Equity Method Investees [Member] Equity Method Investee [Member] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity method investment ownership percentage Equity Method Investment, Ownership Percentage Equity method investments Equity Method Investments Investments readily determinable fair value Equity Securities without Readily Determinable Fair Value, Amount Investments in and advances to investee companies Payments to Acquire Interest in Subsidiaries and Affiliates Write-down of investments Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount Write-down of equity investment Equity Method Investment, Other than Temporary Impairment Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior Notes due 2019 [Member] Senior Notes Due 2019 B [Member] Senior Notes Due 2019 B Senior Notes due 2021 [Member] Senior Notes 2021 [Member] Senior Notes due 2022 [Member] Senior Notes 2022 [Member] Senior Notes due 2023 2.50% [Member] Senior Notes Due 2023 2.50 Percent [Member] Senior Notes Due 2023 2.50 Percent [Member] Senior Notes due 2023 2.90% [Member] Senior Notes Due 2023 2.90 Percent [Member] Senior Notes Due 2023 2.90 Percent [Member] Debentures due 2023 [Member] Debentures 2023 [Member] Senior Notes due 2023 7.125% [Member] Senior Notes Due 2023 [Member] Senior Notes Due 2023 [Member] Senior Notes due 2024 [Member] Senior Notes Due 2024 [Member] Senior Notes Due 2024 Senior Notes due 2025 [Member] Senior Notes Due 2025 [Member] Senior Notes Due 2025 [Member] Senior Notes due 2026 [Member] Senior Notes Due 2026 [Member] Senior Notes Due 2026 [Member] Senior Notes due 2027 [Member] Senior Notes Due 2027 [Member] Senior Notes Due 2027 [Member] Senior Notes due 2028 3.375% [Member] Senior Notes Due 2028 [Member] Senior Notes Due 2028 [Member] Senior Notes due 2028 3.70% [Member] Senior Notes Due 2028 3.70 Percent [Member] Senior Notes Due 2028 3.70 Percent [Member] Senior Debentures due 2030 [Member] Senior Debentures Due 2030 [Member] Senior Debentures Due 2030 Senior Debentures due 2033 [Member] Senior Debentures 2033 [Member] Senior Notes due 2040 [Member] Senior Notes 2040 [Member] Senior Notes due 2042 [Member] Senior Notes 2042 [Member] Senior Notes due 2044 [Member] Senior Notes Due 2044 [Member] Senior Notes Due 2044 Senior Notes due 2045 [Member] Senior Notes Due 2045 [Member] Senior Notes Due 2045 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Commercial paper Commercial Paper Carrying value of senior debt Senior Notes Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Obligations under capital leases Capital Lease Obligations Total debt Debt and Capital Lease Obligations Current portion of long-term debt Long-term Debt and Capital Lease Obligations, Current Total long-term debt, net of current portion Long-term Debt and Capital Lease Obligations Net unamortized discount on senior debt Debt Instrument, Unamortized Discount (Premium), Net Unamortized deferred financing costs Unamortized Debt Issuance Expense Decrease (increase) in the carrying value of debt relating to previously settled fair value hedges Deferred (Gain) Loss on Discontinuation of Fair Value Hedge Face value of debt Debt Instrument, Face Amount Derivative Instruments and Hedging Activities Disclosure [Abstract] Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Allowance for doubtful accounts [Member] SEC Schedule, 12-09, Allowance, Credit Loss [Member] Valuation allowance on deferred tax assets [Member] SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Reserve for inventory obsolescence [Member] SEC Schedule, 12-09, Reserve, Inventory [Member] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Balance Acquired through Acquisitions SEC Schedule, 12-09, Valuation Allowances and Reserves, Business Acquired Charged to Costs and Expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Charged to Other Accounts SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Balance at End of Period Organization, Consolidation and Presentation of Financial Statements [Abstract] Principles of Consolidation Consolidation, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Programming Inventory Inventory, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Impairment of Investments Investment, Policy [Policy Text Block] Goodwill and Intangible Assets Goodwill and Intangible Assets, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Collaborative Arrangements Collaborative Arrangement, Accounting Policy [Policy Text Block] Advertising Advertising Costs, Policy [Policy Text Block] Interest Interest Expense, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Foreign Currency Translation and Transactions Foreign Currency Transactions and Translations Policy [Policy Text Block] Provision for Doubtful Accounts Receivables, Trade and Other Accounts Receivable, Allowance for Doubtful Accounts, Policy [Policy Text Block] Net Earnings (Loss) per Common Share Earnings Per Share, Policy [Policy Text Block] Stock-based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Recently Adopted Accounting Pronouncements and Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Weighted average shares for basic EPS Dilutive effect of shares issuable under stock-based compensation plans Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted average shares for diluted EPS Restructuring Charges [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring reserve, beginning balance Restructuring Reserve Charges Settlements Payments for Restructuring Restructuring reserve, ending balance Goodwill and Intangible Assets Disclosure [Abstract] Impairment Testing Assumptions [Table] Impairment Testing Assumptions [Table] Impairment Test [Axis] Impairment Test [Axis] Impairment Test [Domain] Impairment Test [Domain] International Broadcast License Impairment Test [Member] International Broadcast License [Member] International Broadcast License [Member] FCC Licenses Impairment Test Television Stations [Member] F C C Licenses Impairment Test Television Stations [Member] Qualitative Assessments [Member] Qualitative Assessments [Member] Qualitative Assessments [Member] Goodwill Impairment Test [Member] Goodwill Impairment Test [Member] Reporting Unit [Axis] Reporting Unit [Axis] Reporting Unit [Domain] Reporting Unit [Domain] CBS Sports Network Reporting Unit [Member] CBS Sports Network Reporting Unit [Member] CBS Sports Network Reporting Unit [Member] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Discount Rate [Member] Measurement Input, Discount Rate [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Network Ten [Member] Ten Networks Holdings Limited [Member] Ten Networks Holdings Limited [Member] Impairment Testing Assumptions [Line Items] Impairment Testing Assumptions [Line Items] Number of markets with book value of FCC licenses Number Of Markets With Book Value Of FCC Licenses Number Of Markets With Book Value Of FCC Licenses Number of reporting units Number of Reporting Units Number of markets for which the qualitative assessment was performed Number Of Markets Qualitative Assessment Number of markets for which the qualitative assessment was performed. Discount rate Goodwill and Intangible Assets, Measurement Input Goodwill and Intangible Assets, Measurement Input Perpetual nominal growth rate Perpetual Nominal Growth Rate Growth rates used to estimate the residual value of a business at the end of a projection period in the Company's calculation of the present value of future cash flows. Purchase price Business Combination, Consideration Transferred Income Statement [Abstract] Costs and expenses: Costs and Expenses [Abstract] Operating Direct Operating Costs Selling, general and administrative Selling, General and Administrative Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Restructuring and other corporate matters Restructuring Charges And Other Restructuring and other corporate matters Other operating items, net Total costs and expenses Costs and Expenses Operating income Net loss from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share Net earnings (in dollars per share) Net loss from discontinued operations (in dollars per share) Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share Net earnings (in dollars per share) Inventory Disclosure [Abstract] Acquired program rights Acquired Program Rights Carrying amount as of the balance sheet date of acquired program rights. Acquired television library Acquired Television Library Carrying amount as of the balance sheet date of acquired television library. Internally produced programming, released Direct-to-television Film Costs, Released Internally produced programming, in process and other Direct-to-television Film Costs, Production Publishing, primarily finished goods Other Inventory, Net of Reserves Total programming and other inventory Inventory Total Total current and noncurrent inventory. Less current portion Inventory, Net Programming and other inventory Inventory, Noncurrent Internally produced programming to be amortized in next fiscal year Film Costs, Amortized in Next Operating Cycle Amortization period Film Costs, Amortization Period Estimated period over which remaining released internally produced programming is expected to be substantially amortized Line of Credit Facility [Table] Line of Credit Facility [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Notes [Member] Senior Notes [Member] Debt Due August 2019 [Member] Debt Due August 2019 [Member] Debt Due August 2019 [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Redemption and repayment of senior notes Debt Instrument, Repurchased Face Amount Debt redeemed Debt Instrument, Redemption, Amount Debt Instrument, Redemption, Amount Loss on early extinguishment of debt Loss on early extinguishment of debt. net of tax Extinguishment of Debt, Gain (Loss), Net of Tax Debt maturing classified as long-term reflecting ability and intent to refinance Short-term Debt, Refinanced, Amount Revenue from External Customers by Products and Services [Table] Revenue from External Customers by Products and Services [Table] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Effect [Member] Restatement Adjustment [Member] Revenue from External Customer [Line Items] Revenue from External Customer [Line Items] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Schedule of Changes in Book Value of Goodwill by Segment Schedule of Goodwill [Table Text Block] Schedule of Indefinite-lived Intangible Assets Schedule of Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Finite-lived Intangible Assets Amortization Expense Finite-lived Intangible Assets Amortization Expense [Table Text Block] Schedule of Expected Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Assets Assets Assets of discontinued operations Disposal Group, Including Discontinued Operation, Assets Assets held for sale Assets Held-For-Sale, Noncurrent Assets Held-For-Sale, Noncurrent Long-Lived Assets Long-Lived Assets Capital expenditures Payments to Acquire Property, Plant, and Equipment Change in reserve for uncertain tax positions, excluding related accrued interest and penalties Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized tax benefits, beginning of year Unrecognized Tax Benefits Additions for current year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions for prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Reductions for prior year tax positions Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Cash settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Statute of limitations lapses Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized tax benefits, end of year Unrecognized revenue Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Expected timing of satisfaction period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period U.S. and Foreign Components of Earnings From Continuing Operations Before Income Taxes and Equity in Loss of Investee Companies Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Income Tax Provision Components Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation of U.S. Federal Statutory Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Components of Deferred Income Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Change in Reserve for Uncertain Tax Positions Summary of Income Tax Contingencies [Table Text Block] Retirement Benefits [Abstract] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Mortgage-backed securities [Member] Collateralized Mortgage Backed Securities [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 [Member] Fair Value, Inputs, Level 1 [Member] Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Retirement Plan Type [Axis] Retirement Plan Type [Axis] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Postretirement benefits [Member] Other Postretirement Benefits Plan [Member] Defined benefit plan change in fair value plan assets Level 3 [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair value of plan assets, beginning of year Defined Benefit Plan, Plan Assets, Amount Contributions and distributions, net Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Period Increase (Decrease) Fair value of plan assets, end of year Investments Investments and Other Noncurrent Assets [Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Operating Activities [Axis] Operating Activities [Axis] Operating Activities [Domain] Operating Activities [Domain] Continuing Operations [Member] Continuing Operations [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Restructuring Charges and Other Corporate Matters [Member] Restructuring Charges And Other [Member] Restructuring Charges And Other [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of shares available for future grant under equity incentive plans (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant RSUs and PSUs Restricted Stock or Unit Expense Stock options Stock or Unit Option Plan Expense Stock-based compensation expense, before income taxes Share-based Compensation Related tax benefit Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Stock-based compensation expense, net of tax benefit Allocated Share-based Compensation Expense, Net of Tax Forfeitures Stock-Based Compensation, Forfeitures Stock-Based Compensation, Forfeitures Accelerations Stock-Based Compensation Expense, Accelerations Stock-Based Compensation Expense, Accelerations Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Pension benefits [Member] Pension Plan [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Components of net periodic cost: Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Amortization of actuarial losses (gains) Defined Benefit Plan, Amortization of Gain (Loss) Amortization of prior service cost Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Settlements Net periodic cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Other comprehensive income (loss): Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax [Abstract] Actuarial (loss) gain Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Amortization of actuarial losses (gains) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, before Tax Amortization of prior service cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, before Tax Settlements Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax Cumulative translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Recognized in other comprehensive income, before tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax Deferred income taxes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax Recognized in other comprehensive income (loss), net of tax Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax Expected Amortization Defined Benefit Plan, Expected Amortization, Next Fiscal Year [Abstract] Estimated net actuarial gain (loss) that will be amortized into net periodic benefit cost over next fiscal year Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year Estimated net prior service cost (credit) that will be amortized into net periodic benefit cost over the next fiscal year Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Assets [Member] Other Assets [Member] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Television Licensing [Member] Television Licensing [Member] Television Licensing [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Options [Member] Employee Stock Option [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Cash and Cash Equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Restricted cash Restricted Cash Goodwill and Intangible Assets Intangible Assets, Net (Including Goodwill) [Abstract] Finite-lived intangible asset useful life Finite-Lived Intangible Asset, Useful Life Revenues Revenues [Abstract] Collection term Content Licensing And Distribution Collection Term Content Licensing And Distribution Collection Term Noncurrent receivables Nontrade Receivables, Noncurrent Deferred revenue Contract with Customer, Liability Revenue recognized Contract with Customer, Liability, Revenue Recognized Advertising Marketing and Advertising Expense [Abstract] Advertising expense Advertising Expense Provision For Doubtful Accounts Provision For Doubtful Accounts [Abstract] Provision For Doubtful Accounts [Abstract] Provision for doubtful accounts charged to expense Provision for Doubtful Accounts Net Earnings (Loss) per Common Share Earnings Per Share [Abstract] Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Revenue from Contract with Customer [Abstract] Financial Statements Impacted by ASC 606 Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Supplemental Financial Information Additional Financial Information Disclosure [Text Block] Weighted average assumptions used to determine benefit obligations at December 31: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract] Discount rate Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Weighted average assumptions used to determine net periodic costs for the year ended December 31: Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract] Discount rate Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Expected long-term return on plan assets Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets Rate of compensation increase Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Defined Benefit Plan, Assumed Health Care Cost Trend Rates Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract] Projected health care cost trend rate Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Ultimate trend rate Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Provision for income taxes for discontinued operations Discontinued Operation, Tax Effect of Discontinued Operation Provision (benefit) for income taxes Effective income tax rate Effective Income Tax Rate Reconciliation, Percent Tax benefits from exercise of stock options and vesting of RSUs TaxBenefitStockBasedCompensation Tax benefit from exercise of stock options and vesting of RSUs Net deferred tax assets of discontinued operations Disposal Group, Including Discontinued Operation, Deferred Tax Assets Net operating loss carryforwards Operating Loss Carryforwards Valuation allowance Deferred Tax Assets, Valuation Allowance Estimated tax on repatriation of foreign earnings Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Transition Tax For Accumulated Foreign Earnings, Provisional Income Tax Expense Estimated tax on remeasurement of deferred income tax Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense Provisional amount of transition tax on cumulative foreign earnings and profits Tax Cuts And Jobs Act, Measurement Period Adjustment For Accumulated Foreign Earnings, Income Tax Expense (Benefit) Tax Cuts And Jobs Act, Measurement Period Adjustment For Accumulated Foreign Earnings, Income Tax Expense (Benefit) Unrecognized tax benefits Amount included in reserve for uncertain tax positions that would affect Company's effective income tax rate (including discontinued operations) if recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Interest and penalty charges related to the reserve for uncertain tax positions Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Liabilities for accrued interest and penalty charges related to the reserve for uncertain tax positions Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Commitments and Contingencies Disclosure [Abstract] Capital Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2019 Capital Leases, Future Minimum Payments Due, Next Twelve Months 2020 Capital Leases, Future Minimum Payments Due in Two Years 2021 Capital Leases, Future Minimum Payments Due in Three Years 2022 Capital Leases, Future Minimum Payments Due in Four Years 2023 Capital Leases, Future Minimum Payments Due in Five Years 2024 and thereafter Capital Leases, Future Minimum Payments Due Thereafter Total minimum payments Capital Leases, Future Minimum Payments, Net Minimum Payments Less amounts representing interest Capital Leases, Future Minimum Payments, Interest Included in Payments Present value of minimum payments Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Operating Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2019 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2020 Operating Leases, Future Minimum Payments, Due in Two Years 2021 Operating Leases, Future Minimum Payments, Due in Three Years 2022 Operating Leases, Future Minimum Payments, Due in Four Years 2023 Operating Leases, Future Minimum Payments, Due in Five Years 2024 and thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum payments Operating Leases, Future Minimum Payments Due Schedule of Cash and Cash Equivalents [Table] Schedule of Cash and Cash Equivalents [Table] Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Cash paid (refunded) for income taxes Income Taxes Paid, Net Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Shares received in split-off of CBS Radio Stockholders Equity Note Split Off Transaction Equity impact of the value of stock that has been accepted in a split-off transaction and is now held in treasury Noncash additions to property and equipment Noncash or Part Noncash Acquisition, Fixed Assets Acquired Equipment acquired under capitalized leases Capital Lease Obligations Incurred Statement of Comprehensive Income [Abstract] Net earnings Other comprehensive income (loss) net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Cumulative translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Net actuarial gain (loss) and prior service costs (Note 14) Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] ASC 606 [Member] Accounting Standards Update 2014-09 [Member] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] ASSETS Assets [Abstract] Receivables, net Accounts Receivable, Net, Current Other assets (noncurrent receivables) Other Assets, Noncurrent Liabilities Liabilities [Abstract] Other current liabilities Other Liabilities, Current Deferred income tax liabilities, net Deferred Income Tax Liabilities, Net Participants’ share and royalties payable Accrued Royalties Accumulated deficit Retained Earnings (Accumulated Deficit) Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Advertising [Member] Advertising [Member] Programming [Member] Programming [Member] Programming [Member] Affiliate And Subscription Fees [Member] Affiliate And Subscription Fees [Member] Affiliate And Subscription Fees [Member] Other [Member] Service, Other [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Type of Arrangement and Non-arrangement Transactions [Axis] Type of Arrangement and Non-arrangement Transactions [Axis] Arrangements and Non-arrangement Transactions [Domain] Arrangements and Non-arrangement Transactions [Domain] Renewal of Licensing Agreements [Member] Renewal Of Licensing Agreements [Member] Renewal Of Licensing Agreements [Member] Operating expenses Operating income Less: Provision for income taxes Diluted EPS (in dollars per share) Distribution Arrangements [Member] Distribution Arrangements [Member] Distribution Arrangements [Member] Other Current Liabilities [Member] Other Current Liabilities [Member] Accumulated deficit Sales return reserve Contract with Customer, Refund Liability, Current Condensed Financial Information Disclosure [Abstract] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] CBS Corp. [Member] Parent Company [Member] CBS Operations Inc. [Member] Guarantor Subsidiaries [Member] Non-Guarantor Affiliates [Member] Non-Guarantor Subsidiaries [Member] Eliminations [Member] Consolidation, Eliminations [Member] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Programming and other inventory Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net property and equipment Property, Plant and Equipment, Net Goodwill Goodwill Intangible assets Intangible Assets, Net (Excluding Goodwill) Investments in consolidated subsidiaries Investments In Consolidated Subsidiaries Carrying amount, as of balance sheet date, of investments in subsidiaries which are eliminated in consolidation. Other assets Intercompany Intercompany Receivables Carrying amount, as of balance sheet date, of intercompany receivables which are eliminated in the consolidation. Total Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Accounts payable Accounts Payable, Current Participants’ share and royalties payable Accrued Royalties, Current Accrued programming and production costs Program Rights Obligations, Current Accrued expenses and other current liabilities Accrued Expenses And Other Liabilities Current Condensed Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Also includes current obligations of discontinued operations and current obligations not separately disclosed in the condensed consolidating balance sheet. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Total current liabilities Liabilities, Current Long-term debt Other liabilities Total Other Liabilities Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the condensed consolidating balance sheet, including liabilities of discontinued operations. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). Intercompany Intercompany Liabilities Carrying amount, as of balance sheet date, of intercompany liabilities which are eliminated in the consolidation. Stockholders’ Equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Retained earnings (deficit) Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Stockholders' equity including treasury stock Stockholders' Equity before Treasury Stock Less treasury stock, at cost Treasury Stock, Value Total Stockholders’ Equity Stockholders' Equity Attributable to Parent Total Liabilities and Stockholders’ Equity Liabilities and Equity Condensed Consolidating Financial Statements Condensed Financial Information of Parent Company Only Disclosure [Text Block] Programming and Talent Other Commitment, Fiscal Year Maturity [Abstract] 2019 Other Commitment, Due in Next Twelve Months 2020 Other Commitment, Due in Second Year 2021 Other Commitment, Due in Third Year 2022 Other Commitment, Due in Fourth Year 2023 Other Commitment, Due in Fifth Year 2024 and thereafter Other Commitment, Due after Fifth Year Total Other Commitment Purchase Obligations Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract] 2019 Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months 2020 Unrecorded Unconditional Purchase Obligation, Due within Two Years 2021 Unrecorded Unconditional Purchase Obligation, Due within Three Years 2022 Unrecorded Unconditional Purchase Obligation, Due within Four Years 2023 Unrecorded Unconditional Purchase Obligation, Due within Five Years 2024 and thereafter Unrecorded Unconditional Purchase Obligation, Due after Five Years Total Unrecorded Unconditional Purchase Obligation Other Long-Term Contractual Obligations Recorded Unconditional Purchase Obligation, Fiscal Year Maturity Schedule [Abstract] 2019 Recorded Unconditional Purchase Obligation Due in Next Twelve Months 2020 Recorded Unconditional Purchase Obligation Due in Second Year 2021 Recorded Unconditional Purchase Obligation Due in Third Year 2022 Recorded Unconditional Purchase Obligation Due in Fourth Year 2023 Recorded Unconditional Purchase Obligation Due in Fifth Year 2024 and thereafter Recorded Unconditional Purchase Obligation Due after Fifth Year Total Recorded Unconditional Purchase Obligation Fair value of senior debt Debt Instrument, Fair Value Disclosure Derivative [Table] Derivative [Table] Hedging Relationship [Axis] Hedging Relationship [Axis] Hedging Relationship [Domain] Hedging Relationship [Domain] Cash flow hedging [Member] Cash Flow Hedging [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] Foreign exchange contract [Member] Foreign Exchange Contract [Member] Derivative [Line Items] Derivative [Line Items] Notional amount of derivative Derivative, Notional Amount Gain (loss) on non-designated foreign exchange contracts Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Basis of Presentation and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Common Class A [Member] Common Class B [Member] Common Class B [Member] Statement [Line Items] Statement [Line Items] Current Assets: Assets, Current [Abstract] Receivables, less allowances of $41 (2018) and $49 (2017) Prepaid income taxes Prepaid Taxes Prepaid expenses Prepaid Expense, Current Other current assets Other Assets, Current Assets held for sale (Note 2) Current Liabilities: Liabilities, Current [Abstract] Accrued expenses Accrued Liabilities, Current Accrued compensation Employee-related Liabilities, Current Deferred revenues Contract with Customer, Liability, Current Other current liabilities Participants’ share and royalties payable Accrued Royalties Noncurrent Carrying value as of the balance sheet date of obligations incurred through that date and payable for royalties. Used to reflect the noncurrent portion of the liabilities (due after one year or the normal operating cycle if longer). Pension and postretirement benefit obligations Liability, Defined Benefit Plan, Noncurrent Other liabilities Other Liabilities, Noncurrent Commitments and contingencies Commitments and Contingencies Accumulated other comprehensive loss Stockholder' equity including treasury stock Less treasury stock, at cost; 500 (2018) and 489 (2017) Class B Shares Schedule of Debt Schedule of Debt [Table Text Block] Scheduled Maturities of Long-term Debt at Face Value Schedule of Maturities of Long-term Debt [Table Text Block] Stock-based compensation Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits Disclosure [Text Block] Contributions to defined contribution plans Defined Contribution Plan, Cost Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Discontinued Operations and Disposal Groups [Abstract] Schedule of Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Other Items, Net [Member] Other Items, Net [Member] Other Items, Net [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Net benefit costs, other than service cost Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Retirement Plan Tax Status [Axis] Retirement Plan Tax Status [Axis] Retirement Plan Tax Status [Domain] Retirement Plan Tax Status [Domain] Qualified Plan [Member] Qualified Plan [Member] Funded status at end of year Defined Benefit Plan, Funded (Unfunded) Status of Plan Other assets Assets for Plan Benefits, Defined Benefit Plan Current liabilities Liability, Defined Benefit Plan, Current Noncurrent liabilities Net amounts recognized Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position Financial Instruments Derivative Instruments, Gain (Loss) [Table Text Block] Related Party Transactions [Abstract] Related Parties Related Party Transactions Disclosure [Text Block] Amounts Due from Viacom Inc Schedule of Related Party Transactions [Table Text Block] Deferred income tax assets: Deferred Tax Assets, Gross [Abstract] Reserves and other accrued liabilities Deferred Tax Assets, Tax Deferred Expense Pension, postretirement and other employee benefits Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Tax credit and loss carryforwards Deferred Tax Assets, Tax Credit Carryforwards, General Business Other Deferred Tax Assets, Other Total deferred income tax assets Deferred Tax Assets, Gross Valuation allowance Deferred income tax assets, net Deferred Tax Assets, Net of Valuation Allowance Deferred income tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Intangible assets Deferred Tax Liabilities, Intangible Assets Unbilled licensing receivables Deferred Tax Liabilities, Tax Deferred Income Property, equipment and other assets Deferred Tax Liabilities, Other Total deferred income tax liabilities Deferred Tax Liabilities, Gross Deferred income tax liabilities, net Deferred Tax Liabilities, Net Property and Equipment Property, Plant and Equipment [Table Text Block] Reconciliation from Basic to Diluted Shares Schedule of Weighted Average Number of Shares [Table Text Block] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Other [Member] Previous Disposed Business [Member] Previous Disposed Business [Member] FCC License [Member] FCC License [Member] FCC License [Member] Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Revenues Disposal Group, Including Discontinued Operation, Revenue Costs and expenses: Disposal Group, Including Discontinued Operation, Cost and Expenses [Abstract] Disposal Group, Including Discontinued Operation, Cost and Expenses [Abstract] Operating Disposal Group, Including Discontinued Operation, Operating Expense Selling, general and administrative Disposal Group, Including Discontinued Operation, General and Administrative Expense Market value adjustment Depreciation and amortization Disposal Group, Including Discontinued Operation, Depreciation and Amortization Restructuring charges Disposal Group, Including Discontinued Operation, Restructuring Charges Disposal Group, Including Discontinued Operation, Restructuring Charges Impairment charge Disposal Group, Including Discontinued Operation, Impairment Expense Disposal Group, Including Discontinued Operation, Impairment Expense Total costs and expenses Disposal Group, Including Discontinued Operation, Costs and Expense Disposal Group, Including Discontinued Operation, Costs and Expense Operating loss Disposal Group, Including Discontinued Operation, Operating Income (Loss) Interest expense Disposal Group, Including Discontinued Operation, Interest Expense Other items, net Disposal Group, Including Discontinued Operation, Other Income (Expense) Amount of income (expense) related to nonoperating activities, classified as other, attributable to disposal group, including, but not limited to, discontinued operation. Earnings (loss) from discontinued operations Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax Income tax benefit (provision) Discontinued Operation, Tax Effect of Income (Loss) from Discontinued Operation During Phase-out Period Earnings (loss) from discontinued operations, net of tax Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax Net gain (loss) on disposal Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax Income tax benefit (provision) Net gain (loss) on disposal, net of tax Net earnings (loss) from discontinued operations, net of tax Impairment charges, net of tax Disposal Group, Including Discontinued Operation, Impairment Expense, Net Of Tax Disposal Group, Including Discontinued Operation, Impairment Expense, Net Of Tax Goodwill, impairment loss Disposal Group, Including Discontinued Operation, Goodwill, Impairment Loss Disposal Group, Including Discontinued Operation, Goodwill, Impairment Loss Goodwill, impairment loss, net of tax Disposal Group, Including Discontinued Operation, Goodwill, Impairment Loss, Net Of Tax Disposal Group, Including Discontinued Operation, Goodwill, Impairment Loss, Net Of Tax Number of radio markets impairment Number Of Radio Markets Impairment Number Of Radio Markets Impairment Condensed Income Statement [Table] Condensed Income Statement [Table] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Other operating items, net Interest (expense) income, net Interest Income (Expense), Nonoperating, Net Benefit (provision) for income taxes Equity in earnings (loss) of investee companies, net of tax Total comprehensive income Stockholders' Equity Note [Abstract] Accumulated Other Comprehensive Income Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Current Programming and Other Inventory Schedule of Inventory, Current [Table Text Block] Noncurrent Programming and Other Inventory Schedule of Inventory, Noncurrent [Table Text Block] Allowances for receivables Allowance for Doubtful Accounts Receivable, Current Class of Stock [Line Items] Class of Stock [Line Items] Common Stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common Stock, shares authorized (in shares) Common Stock, Shares Authorized Common Stock, shares issued (in shares) Common Stock, Shares, Issued Treasury Stock, at cost, Class B Shares (in shares) Treasury Stock, Shares Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value Measured at net asset value [Member] Fair Value Measured at Net Asset Value Per Share [Member] Cash and cash equivalents [Member] Defined Benefit Plan, Cash and Cash Equivalents [Member] US treasury securities [Member] US Treasury Securities [Member] Government-related securities [Member] US Government Debt Securities [Member] Corporate bonds [Member] Corporate Debt Securities [Member] Mortgage-backed and asset-backed securities [Member] Asset-backed Securities [Member] US large capitalization [Member] Defined Benefit Plan, Equity Securities, US, Large Cap [Member] US small capitalization [Member] Defined Benefit Plan, Equity Securities, US, Small Cap [Member] International equity [Member] Defined Benefit Plan, Equity Securities, Non-US [Member] Other investments [Member] Other Investments [Member] Common collective funds [Member] Defined Benefit Plan, Common Collective Trust [Member] Limited partnerships [Member] Limited Partnerships [Member] Investments in limited partnerships. Mutual funds [Member] Mutual Fund [Member] Investments, at fair value Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Service period over which grants vest Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Stock option term until expiration Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Weighted average grant date fair value of stock options (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Minimum term of publicly traded options used to derive implied volatility of options grants Share-based Compensation Arrangement By Share-based Payment Award Fair Value Assumptions Minimum Expected Term Of Company Option Minimum expected term of company options traded, publicly, near the grant date and at a similar grant price used to derive implied volatility for options granted. Unrecognized future expense of unvested stock options Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Weighted average period over which future expense of unrecognized stock-based compensation will be recognized (years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted average remaining contractual life of outstanding stock options (years) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Share price (USD per share) Share Price Intrinsic value of stock options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Weighted average remaining contractual life of exercisable stock options (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Intrinsic value of stock options exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Fair Value Measurements Fair Value Disclosures [Text Block] Property, Plant and Equipment [Abstract] National Amusements Inc [Member] Majority Shareholder [Member] Viacom Inc [Member] Affiliated Entity [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Member] Subsequent Event [Member] NAI ownership of CBS Corp. Class A common stock (percentage) Ownership Percent Of Class A Stock By Controlling Stockholder Percent of Company Class A Common Stock owned by controlling stockholder as of the financial statement date NAI ownership of CBS Corp. Class A and Class B common stock on a combined basis (percentage) Ownership Percent Of Class A And Class B Stock By Controlling Stockholder Percent of Company Corp. Class A and Class B Common Stock, on a combined basis, owned by controlling stockholder as of the financial statement date SMR trust ownership in NAI Chairman Emeritus Trust Ownership Percentage In Controlling Stockholder Chairman Emeritus trust ownership percentage in controlling stockholder Number of trustees Number of Trustees Number of Trustees of Chairman Emeritus Trust Professional fees Professional Fees Revenues from transactions with related parties Revenue from Related Parties Expenses from transactions with related parties Related Party Transaction, Expenses from Transactions with Related Party Amounts due from Related Party Due from Related Parties, Current [Abstract] Receivables Due from Related Parties, Current Other assets (Receivables, noncurrent) Due from Related Parties, Noncurrent Amounts due from related party Due from Related Parties Number of equity interests Number of Equity Interests Number of equity interests in domestic television networks Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Severance costs [Member] Employee Severance [Member] Contract termination and other related costs [Member] Contract Termination [Member] Operating Expense [Member] Operating Expense [Member] Restructuring charges Payments for restructuring Other corporate matters, costs Professional fees associated with merger and acquisition activities Business Combination, Acquisition Related Costs Programming Charges Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock [Member] Additional Paid-In Capital [Member] Additional Paid-in Capital [Member] Accumulated Deficit [Member] Retained Earnings [Member] Accumulated Other Comprehensive Loss [Member] AOCI Attributable to Parent [Member] Treasury Stock [Member] Treasury Stock [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance, beginning of year (shares) Shares, Issued Balance, beginning of year Conversion of A shares into B shares (shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Conversion of A shares into B shares Stock Issued During Period, Value, Conversion of Convertible Securities Restricted stock unit vests (shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock unit vests Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Exercise of stock options (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Retirement of treasury stock (shares) Treasury Stock, Shares, Retired Retirement of treasury stock Treasury Stock, Retired, Cost Method, Amount Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Tax benefit related to employee stock-based transactions Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Dividends Adjustments to Additional Paid in Capital, Dividends in Excess of Retained Earnings Decrease in noncontrolling interest Adjustments to Additional Paid in Capital, Other Adoption of new accounting standard (Note 16) Cumulative Effect of New Accounting Principle in Period of Adoption Other comprehensive income (loss) Class B Common Stock purchased (shares) Treasury Stock, Shares, Acquired Class B Common Stock purchased Treasury Stock, Value, Acquired, Cost Method CBS Radio Split-Off (shares) Company Stock Received In Split Off Transaction Shares Shares of Company stock received in split-off transaction CBS Radio Split-Off Shares paid for tax withholding for stock-based compensation (shares) Shares Paid for Tax Withholding for Share Based Compensation Shares paid for tax withholding for stock-based compensation Adjustments Related to Tax Withholding for Share-based Compensation Issuance of stock for deferred compensation (shares) Deferred Compensation Arrangement with Individual, Shares Issued Issuance of stock for deferred compensation Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued Balance, end of year (shares) Balance, end of year Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill Rollforward [Line Items] Goodwill [Line Items] Goodwill Goodwill [Roll Forward] Goodwill, beginning balance Goodwill, Gross Accumulated impairment losses, beginning balance Goodwill, Impaired, Accumulated Impairment Loss Goodwill, net of impairment, beginning balance Acquisitions Goodwill, Acquired During Period Accumulated impairment losses, Acquisitions Goodwill, Accumulated Impairment Acquired During Period Goodwill, Accumulated Impairment Acquired During Period Goodwill, net of impairment, Acquisitions Goodwill, Acquired During Period, Net Goodwill, Acquired During Period, Net Dispositions Goodwill, Written off Related to Sale of Business Unit Accumulated impairment losses, Dispositions Goodwill, Accumulated Impairment Written off Related to Sale of Business Unit Goodwill, Accumulated Impairment Written off Related to Sale of Business Unit Goodwill, net of impairment, Dispositions Goodwill, Written off Related to Sale of Business Unit, Net Goodwill, Written off Related to Sale of Business Unit, Net Goodwill, ending balance Accumulated impairment losses, ending balance Goodwill, net of impairment, ending balance Goodwill associated with CBS Sports Network Goodwill Reclassified Among Segments Goodwill Reclassified Among Segments Projected benefit obligation Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Projected Benefit Obligation Accumulated benefit obligation Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Accumulated Benefit Obligation Fair value of plan assets Defined Benefit Plan, Plan with Accumulated Benefit Obligation in Excess of Plan Assets, Plan Assets Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Shares received in exchange offer (in shares) Disposal Group, Including Discontinued Operation, Shares Received in Exchange Offer Disposal Group, Including Discontinued Operation, Shares Received in Exchange Offer Shares exchanged in exchange offer (in shares) Disposal Group, Including Discontinued Operation, Shares Exchanged in Exchange Offer Disposal Group, Including Discontinued Operation, Shares Exchanged in Exchange Offer Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rate [Abstract] Effect of one percentage point increase on total service and interest cost components Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components Effect of one percentage point decrease on total service and interest cost components Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components Effect of one percentage point increase in accumulated postretirement benefit obligation Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation Effect of one percentage point decrease on the accumulated postretirement benefit obligation Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation Performance Share Units (PSUs) [Member] Performance Shares [Member] Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Aggregate fair value of RSUs vested during the period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Unrecognized future expense of unvested RSUs Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Fair value Share-based Compensation Arrangement By Share-based Payment Award, Options, Granted In Period, Fair Value Share-based Compensation Arrangement By Share-based Payment Award, Options, Granted In Period, Fair Value RSUs Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Non-vested (shares), beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested (shares), ending balance Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Non-vested, beginning balance (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Non-vested, ending balance (USD per share) United States Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Bank Financing and Debt Debt Disclosure [Text Block] Pension and postretirement benefit costs Foreign exchange (losses) gains Foreign Currency Transaction Gain (Loss), before Tax Net loss from investments Equity Securities Without Readily Determinable Fair Value, Gain (Loss) Equity Securities Without Readily Determinable Fair Value, Gain (Loss) Other items, net Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Asbestos Claims [Member] Asbestos Issue [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of pending asbestos claims Loss Contingency, Pending Claims, Number Number of new asbestos claims Loss Contingency, New Claims Filed, Number Number of asbestos claims closed or moved to inactive docket Loss Contingency, Claims Settled and Dismissed, Number Cost for settlement and defense of asbestos claims, net of insurance recoveries and tax benefits Liability for Asbestos and Environmental Claims, Net, Incurred Loss Other Commitments [Table] Other Commitments [Table] Other Commitments [Axis] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] Sports programming rights commitments [Member] Sports Programming Rights Commitments [Member] Production and licensing of television and film programming [Member] Production Licensing Of Programming [Member] Production and licensing of television and film programming [Member] Talent contracts [Member] Talent Contracts [Member] Other Commitments [Line Items] Other Commitments [Line Items] Programming and talent commitments Purchase obligations Future minimum sublease income Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals Rent expense Operating Leases, Rent Expense Outstanding letters of credit and surety bonds Letters of Credit Outstanding, Amount Charitable contribution expense Cash Charitable Contribution Expense Cash Charitable Contribution Expense Contributions to grantor trust Contributions To Grantor Trust Contributions To Grantor Trust Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected stock price volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected term of options Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Commercial Paper [Member] Commercial Paper [Member] Maximum borrowing capacity under credit facility Line of Credit Facility, Maximum Borrowing Capacity Debt term Debt Instrument, Term Weighted average interest rate Short-term Debt, Weighted Average Interest Rate, at Point in Time Discontinued Operations Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Revenues by Segment Reconciliation of Revenue from Segments to Consolidated [Table Text Block] Intercompany Revenues by Segment Segment Reporting Intercompany Revenues [Table Text Block] Tabular disclosure of amount of revenue from transactions with other reportable segments of the same entity. Operating Income (Loss) by Segment Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Depreciation and Amortization, Stock-based Compensation and Capital Expenditures Reconciliation of Other Significant Reconciling Items from Segments to Consolidated [Table Text Block] Assets by Segment Reconciliation of Assets from Segment to Consolidated [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Revenues by Customer Location Revenue from External Customers by Geographic Areas [Table Text Block] Long-lived Assets by Geographic Area Long-lived Assets by Geographic Areas [Table Text Block] Taxes on income at U.S. federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State and local taxes, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Effect of foreign operations Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Impact of federal tax legislation Income Tax Reconciliation Tax Cuts And Jobs Act Of 2017, Provisional Income Tax Expense (Benefit) Income Tax Reconciliation Tax Cuts And Jobs Act Of 2017, Provisional Income Tax Expense (Benefit) Excess tax benefits from stock-based compensation Tax Benefit Realized From Employee Stock Option Exercises And Restricted Share Vests Disclosure of the difference between the tax benefit from stock-based compensation expense and the deduction on the tax return associated with the exercise of stock options and vesting of RSUs. Domestic production deduction Effective Income Tax Rate Reconciliation, Deduction, Qualified Production Activity, Amount Other, net Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Provision for income taxes Multiyear adjustment to tax deduction Effective Income Tax Rate Reconciliation, Deduction, Other, Amount Programming and Other Inventory Inventory Disclosure [Text Block] Amortization expense Amortization of Intangible Assets Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Trade names [Member] Trade Names [Member] Other intangible assets [Member] Other Intangible Assets [Member] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] FCC licenses [Member] Operating and Broadcast Rights [Member] International broadcast licenses [Member] Operating and Broadcast Rights International [Member] Operating and Broadcast Rights International [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Finite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Finite-Lived Intangible Assets, Net Indefinite-lived intangible assets Indefinite-lived Intangible Assets (Excluding Goodwill) Total intangible assets, gross Intangible Assets, Gross (Excluding Goodwill) Total intangible assets Nonqualified Plan [Member] Nonqualified Plan [Member] 2019 Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2020 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2021 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2024-2028 Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter Expected contribution in the next fiscal year Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Retiree Medicare drug subsidy Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract] 2019 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Next Twelve Months 2020 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Two 2021 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Three 2022 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Four 2023 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, Year Five 2024-2028 Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt, after Year Five Schedule II - Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] 2019 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2020 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Five Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Buildings and building improvements [Member] Building [Member] Leasehold Improvements [Member] Leasehold Improvements [Member] Equipment and other (including capital leases) [Member] Other Capitalized Property Plant and Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment estimated useful life Property, Plant and Equipment, Useful Life Leasehold improvement estimated useful life Property, Plant and Equipment, Estimated Useful Lives Commitments Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Exercise price range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $5 to $9.99 [Member] Range 5 To 999 [Member] $10 to $19.99 [Member] Range 10 To 1999 [Member] $20 to $29.99 [Member] Range 20 To 2999 [Member] $30 to $39.99 [Member] Range 30 To 3999 [Member] $40 to $49.99 [Member] Range 40 To 4999 [Member] $50 to $59.99 [Member] Range 50 To 5999 [Member] $60 to $69.99 [Member] Range 60 To 6999 [Member] Range 60 To 6999 [Member] Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Exercise price range, lower range limit (USD per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Exercise price range, upper range limit (USD per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Number of stock options outstanding (shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Stock options outstanding, weighted average exercise (USD per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Number of stock options exercisable (shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Stock options exercisable, weighted average exercise price (USD per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State and local Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Total current income tax expense provision Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit) Net actuarial (loss) gain Defined Benefit Plan, Accumulated Other Comprehensive Income (Loss), Gain (Loss), before Tax Net prior service cost Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax Share of equity investee Defined Benefit Plan Accumulated Other Comprehensive Income Share Of Equity Investee Before Tax Share of equity method investee's other comprehensive income included in the Company's other comprehensive income. Net amount recognized in accumulated other comprehensive income (loss) before tax Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax Deferred income taxes Defined Benefit Plan Accumulated Other Comprehensive Income Deferred Tax Deferred income taxes relating to amounts recorded in accumulated other comprehensive income associated with pension and postretirement benefit plans. Net amount recognized in accumulated other comprehensive income (loss) Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Accumulated benefit obligation for all defined benefit pension plans Defined Benefit Plan, Accumulated Benefit Obligation Change in plan assets: Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer Benefits paid Defined Benefit Plan, Plan Assets, Benefits Paid Participants’ contributions Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Retiree Medicare drug subsidy Defined Benefit Plan, Plan Assets, Prescription Drug Subsidy Receipt Settlements Defined Benefit Plan, Plan Assets, Payment for Settlement Cumulative translation adjustments Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss) Quarterly Financial Data (Unaudited) Quarterly Financial Information [Table Text Block] Operating Activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Less: Net loss from discontinued operations, net of tax Net earnings from continuing operations Adjustments to reconcile net earnings from continuing operations to net cash flow provided by operating activities from continuing operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Deferred tax provision (benefit) Redemption of debt Early Extinguishment Of Debt Adjustment To Cash Portion Adjustment to gain or loss on early extinguishment of debt to arrive at the portion of cash paid for early extinguishment of debt that is classified as operating cash flows. Net loss (gain) on disposition and write-down of assets Gain (Loss) on Sale of Assets and Asset Impairment Charges Equity in loss of investee companies, net of tax and distributions Income (Loss) from Equity Method Investments, Net of Dividends or Distributions Change in assets and liabilities, net of investing and financing activities Increase (Decrease) in Operating Capital [Abstract] (Increase) decrease in receivables Increase (Decrease) in Accounts Receivable Increase in inventory and related program and participation liabilities, net Increase (Decrease) in Inventories Decrease (increase) in other assets Increase (Decrease) in Other Operating Assets Decrease in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities (Decrease) increase in pension and postretirement benefit obligations Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits Increase in income taxes Increase (Decrease) in Income Taxes Payable (Decrease) increase in deferred revenue Increase (Decrease) in Contract with Customer, Liability Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash flow provided by operating activities from continuing operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash flow provided by operating activities from discontinued operations Cash Provided by (Used in) Operating Activities, Discontinued Operations Net cash flow provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing Activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Investments in and advances to investee companies Capital expenditures Acquisitions (including acquired television library), net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Proceeds from sale of investments Proceeds from Sale, Maturity and Collection of Investments Proceeds from dispositions Proceeds from Divestiture of Businesses Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash flow used for investing activities from continuing operations Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash flow used for investing activities from discontinued operations Cash Provided by (Used in) Investing Activities, Discontinued Operations Net cash flow used for investing activities Net Cash Provided by (Used in) Investing Activities Financing Activities: Net Cash Provided by (Used in) Financing Activities [Abstract] (Repayments of) proceeds from short-term debt borrowings, net Proceeds from (Repayments of) Short-term Debt, Maturing in Three Months or Less Proceeds from issuance of senior notes Proceeds from Issuance of Senior Long-term Debt Repayment of senior notes and debentures Repayments of Senior Debt Proceeds from debt borrowings of CBS Radio Proceeds From Debt Borrowings Discontinued Operations Proceeds From Debt Borrowings Discontinued Operations Repayment of debt borrowings of CBS Radio Repayment Of Debt Borrowings Discontinued Operations Repayment of debt borrowings of discontinued operations Payment of capital lease obligations Repayments of Long-term Capital Lease Obligations Dividends Payments of Ordinary Dividends, Common Stock Purchase of Company common stock Payments for Repurchase of Common Stock Payment of payroll taxes in lieu of issuing shares for stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Proceeds from exercise of stock options Proceeds from Stock Options Exercised Excess tax benefit from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities Other financing activities Proceeds from (Payments for) Other Financing Activities Net cash flow used for financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash and cash equivalents at beginning of year (includes $24 (2017) and $6 (2016) of discontinued operations cash) Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Cash, cash equivalents and restricted cash at end of year (includes $120 (2018) of restricted cash and $24 (2016) of discontinued operations cash) Condensed Financial Statements [Table] Condensed Financial Statements [Table] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Net cash flow (used for) provided by operating activities Investments in and advances to investee companies Acquisitions (including acquired television library), net of cash acquired Net cash flow provided by (used for) investing activities from discontinued operations Repayment of debt borrowings of CBS Radio Excess tax benefit from stock-based compensation Increase (decrease) in intercompany payables Increase Decrease In Intercompany Payables The net change during the reporting period in intercompany amounts. Revolving Credit Facility [Member] Revolving Credit Facility [Member] Maximum Consolidated Leverage Ratio Line of Credit Facility, Covenant, Maximum Consolidated Leverage Ratio Line of Credit Facility, Covenant, Maximum Consolidated Leverage Ratio Consolidated Leverage Ratio Line of Credit Facility, Covenant, Consolidated Leverage Ratio Line of Credit Facility, Covenant, Consolidated Leverage Ratio Period for consolidated EBITDA Debt Instrument, Period for Consolidated EBITDA Debt Instrument, Period for Consolidated EBITDA Borrowings outstanding Long-term Line of Credit Availability under the credit facility, net of outstanding letters of credit Line of Credit Facility, Remaining Borrowing Capacity Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding (shares), beginning balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercised (shares) Forfeited or expired (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding (shares), ending balance Exercisable (shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding, beginning balance (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (USD per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Forfeited or expired (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding, ending balance (USD per share) Exercisable (USD per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Segment and Revenue Information Segment Reporting Disclosure [Text Block] Condensed Consolidating Statements of Operations Condensed Income Statement [Table Text Block] Condensed Consolidating Balance Sheets Condensed Balance Sheet [Table Text Block] Condensed Consolidating Statement of Cash Flows Condensed Cash Flow Statement [Table Text Block] Document And Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Document Type Document Type Document Period End Date Document Period End Date Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Common Stock Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float 2019 Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months 2020 Long-term Debt, Maturities, Repayments of Principal in Year Two 2021 Long-term Debt, Maturities, Repayments of Principal in Year Three 2022 Long-term Debt, Maturities, Repayments of Principal in Year Four 2023 Long-term Debt, Maturities, Repayments of Principal in Year Five 2024 and Thereafter Long-term Debt, Maturities, Repayments of Principal after Year Five Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Cumulative translation adjustments [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Net actuarial gain (loss) and prior service cost [Member] Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Balance, beginning of year Other comprehensive income (loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Reclassifications to net earnings Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Balance, end of year Tax (provision) benefit on net actuarial gain (loss) and prior service costs related to pension and other postretirement plans Stockholders' Equity Shareholders' Equity and Share-based Payments [Text Block] Change in Benefit Obligations Schedule of Changes in Projected Benefit Obligations [Table Text Block] Change in Plan Assets Schedule of Changes in Fair Value of Plan Assets [Table Text Block] Funded Status and Amounts Recognized on Consolidated Balance Sheets Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Amounts Recognized in Accumulated Other Comprehensive Income (Loss) Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] Schedule of Accumulated Benefit Obligations in Excess of Plan Assets Schedule of Accumulated Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] Components of Net Periodic Benefit Cost Schedule of Net Benefit Costs [Table Text Block] Schedule of Amounts Recognized in Other Comprehensive Income (Loss) Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Costs Schedule of Assumptions Used [Table Text Block] Assumptions Regarding Heath Care Cost Trend Rates for Postretirement Benefits Schedule of Health Care Cost Trend Rates [Table Text Block] Impact of One Percentage Point Change in Assumed Health Care Trend Rates Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block] Fair Value of Pension Plan Assets Schedule of Allocation of Plan Assets [Table Text Block] Changes in Fair Value of Level 3 Assets Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block] Estimated Future Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Participation in Multi-employer Defined Benefit Pension Plan Schedule of Multiemployer Plans [Table Text Block] Stock-based Compensation Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Rollforward of RSU Activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Weighted Average Assumptions for Black-Scholes Option Pricing Model Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Rollforward of Stock Option Activity Share-based Compensation, Stock Options, Activity [Table Text Block] Stock Option Exercise Information Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block] Stock Options Outstanding and Exercisable by Price Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Retirement Plan Name [Axis] Retirement Plan Name [Axis] Retirement Plan Name [Domain] Retirement Plan Name [Domain] Group Annuity Purchase [Member] Group Annuity Purchase [Member] Group Annuity Purchase [Member] Service period over which benefits vest Benefit Plan Service Period The minimum period that the individual is required to perform services in order to be fully vested under the benefit plans. Percent of plan assets' fair value invested in Company common stock Percent Of Plan Assets Fair Value Invested In Company Common Stock The percent of plan assets invested in Company common stock. Settlements Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement Percent of pension obligations settled Percent Of Pension Obligations Settled Percent Of Pension Obligations Settled Contribution amount Defined Benefit Plan, Employer Discretionary Contribution Amount Defined Benefit Plan, Employer Discretionary Contribution Amount Change in benefit obligation: Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Benefit obligation, beginning of year Defined Benefit Plan, Benefit Obligation Actuarial (gain) loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Participants’ contributions Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant Retiree Medicare drug subsidy Defined Benefit Plan, Benefit Obligation, Prescription Drug Subsidy Receipt Cumulative translation adjustments Defined Benefit Plan, Benefit Obligation, Foreign Currency Translation Gain (Loss) Benefit obligation, end of year Dividends per common share (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends Class B Common Stock purchased Average price per share repurchased (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Remaining authorization under repurchase program Stock Repurchase Program, Remaining Authorized Repurchase Amount Minimum Class A shares needed for conversion (in shares) Minimum Class A Shares For Conversion The minimum number of class A shares that need to be outstanding for holders to convert their class A shares to class B shares. Land [Member] Land [Member] Building [Member] Capital leases [Member] Assets Held under Capital Leases [Member] Equipment and other [Member] Equipment [Member] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale by Asset Type [Axis] Long Lived Assets Held-for-sale, Name [Domain] Long Lived Assets Held-for-sale, Name [Domain] Accumulated amortization of capital leases Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Depreciation expense, including capitalized lease amortization Depreciation Amortization expense related to capital leases Capital Leases, Income Statement, Amortization Expense Sale of property and sound stage Proceeds from Sale of Property, Plant, and Equipment Guaranteed cash flow period Guaranteed Cash Flow Period Guaranteed Cash Flow Period Estimated liability Estimated Liability, Guarantee Obligation Estimated Liability, Guarantee Obligation Gain on sale of property and sound stage operation Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair value assets measured on recurring basis financial statement captions [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Foreign currency hedges Foreign Currency Contract, Asset, Fair Value Disclosure Total Assets Assets, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Deferred compensation Deferred Compensation Liability, Current and Noncurrent Foreign currency hedges Foreign Currency Contracts, Liability, Fair Value Disclosure Total Liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Adoption of Revenue From Contracts With Customers Revenue from Contract with Customer [Text Block] Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Restructuring, Programming Charges and Other Corporate Matters Restructuring and Related Activities Disclosure [Text Block] Restructuring Reserve Rollforward Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Axis] Retirement Plan Sponsor Location [Domain] Retirement Plan Sponsor Location [Domain] Fixed Income Instrument [Member] Fixed Income Securities [Member] Equity securities [Member] Defined Benefit Plan, Equity Securities [Member] Defined benefit plan, actual plan asset allocation Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Defined benefit plan, target plan asset allocations Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Schedule of Multiemployer Plans [Table] Schedule of Multiemployer Plans [Table] Multiemployer Plan Type [Axis] Multiemployer Plan Type [Axis] Multiemployer Plans Type [Domain] Multiemployer Plans Type [Domain] Pension Plan [Member] Multiemployer Plans, Pension [Member] Postretirement Benefit Healthcare [Member] Multiemployer Plans, Postretirement Benefit [Member] Multiemployer Plan Name [Axis] Multiemployer Plan Name [Axis] Multiemployer Plan Name [Domain] Multiemployer Plan Name [Domain] AFTRA Retirement Plan [Member] AFTRA Retirement Plan [Member] Multiemployer defined benefit plan to which the Company contributes. Directors Guild Of America Producer [Member] Directors Guild Of America Producer [Member] Multiemployer defined benefit plan to which the Company contributes. Producer Writers Guild Of America [Member] Producer Writers Guild Of America [Member] Multiemployer defined benefit plan to which the Company contributes. Screen Actors Guild Producers [Member] Screen Actors Guild Producers [Member] Multiemployer defined benefit plan to which the Company contributes. Motion Picture Industry [Member] Motion Picture Industry [Member] Multiemployer defined benefit plan to which the Company contributes. I.A.T.S.E. Local No. 33 Pension Trust Fund [Member] I.A.T.S.E. Local No. 33 Pension Trust Fund [Member] I.A.T.S.E. Local No. 33 Pension Trust Fund [Member] Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member] Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member] Multiemployer Plans [Line Items] Multiemployer Plans [Line Items] Entity tax identification number Entity Tax Identification Number Pension plan number Multiemployer Plan Number Pension Protection Act Multiemployer Plans, Certified Zone Status [Fixed List] Company Contributions Multiemployer Plan, Contributions by Employer Expiration date of collective bargaining agreement Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date Multiemployer Plan for which the company contributed more than 5% of total contributions Multiemployer Plans, Period Contributions, Significance of Contributions [true false] Cash received from stock option exercises Tax benefit of stock option exercises Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options Intrinsic value of stock option exercises Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value