v3.19.2
Document and Entity Information
Aug. 13, 2019
Document And Entity Information [Line Items]  
Entity Registrant Name CBS CORP
Amendment Flag false
Entity Central Index Key 0000813828
Document Type 8-K
Document Period End Date Aug. 13, 2019
Entity Incorporation, State or Country Code DE
Entity File Number 001-09553
Entity Tax Identification Number 04-2949533
Entity Address, Address Line One 51 West 52nd Street
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10019
City Area Code (212)
Local Phone Number 975-4321
Written Communications true
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Class A [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security Class A Common Stock, $0.001 par value
Trading Symbol CBS.A
Security Exchange Name NYSE
Common Class B [Member]  
Document And Entity Information [Line Items]  
Title of 12(b) Security Class B Common Stock, $0.001 par value
Trading Symbol CBS
Security Exchange Name NYSE