Deduction Due to Change in Pension Value and Nonqualified Deferred Compensation Earnings [Member] Deduction Due to Stock Awards and Option Awards [Member] Deduction of ASC 718 Fair Value of Awards Granted Forfeited [Member] Increase Based on ASC 718 Fair Value of Awards Granted, Unvested [Member] Increase Based on Dividends or Other Earnings Paid [Member] Increase or Deduction for Awards Granted Due to Change in ASC 718 Fair Value [Member] Increase or Deduction for Awards Granted Due to Change in ASC 718 Fair Value Outstanding and Unvested [Member] Class A [Member] Class B [Member]