0000813828 2021-03-23 2021-03-23 0000813828 viac:Class160ACommonStock0.001ParValueMember 2021-03-23 2021-03-23 0000813828 us-gaap:CommonClassBMember 2021-03-23 2021-03-23 false 0000813828 --12-31 8-K 2021-03-23 VIACOMCBS INC. DE 001-09553 04-2949533 1515 Broadway New York NY 10036 (212) 258-6000 false false false false Class A Common Stock, $0.001 par value VIACA NASDAQ Class B Common Stock, $0.001 par value VIAC NASDAQ false