Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 311	$ 397
Receivables, less allowances of $75 (2014) and $76 (2013)	3,301	3,415
Programming and other inventory (Note 5)	541	772
Deferred income tax assets, net	168	164
Prepaid expenses	251	194
Other current assets	469	392
Current assets of discontinued operations	36	36
Total current assets	5,077	5,370
Property and equipment	5,003	5,023
Less accumulated depreciation and amortization	2,824	2,787
Net property and equipment	2,179	2,236
Programming and other inventory (Note 5)	1,635	1,697
Goodwill	8,559	8,562
Intangible assets	6,407	6,430
Other assets	2,184	2,010
Assets of discontinued operations	74	82
Total Assets	26,115	26,387
Liablities and Stockholders' Equity [Abstract]
Accounts payable	223	371
Accrued compensation	210	389
Participants' share and royalties payable	947	1,008
Program rights	492	398
Deferred revenues	223	292
Income taxes payable	165	55
Commercial paper (Note 7)	440	475
Current portion of long-term debt (Note 7)	106	21
Accrued expenses and other current liabilities	1,238	1,164
Current liabilities of discontinued operations	28	34
Total current liabilities	4,072	4,207
Long-term debt (Note 7)		5,940
Pension and postretirement benefit obligations	1,313	1,330
Deferred income tax liabilities, net	1,554	1,583
Other liabilities	3,128	3,213
Liabilities of discontinued operations	133	148
Commitments and contingencies (Note 11)
Stockholders' Equity:
Common stock	1	1
Additional paid-in capital	43,225	43,474
Accumulated deficit	(24,422)	(24,890)
Accumulated other comprehensive loss (Note 9)	(543)	(545)
Stockholders' equity before treasury stock	18,261	18,040
Less treasury stock, at cost; 270 (2014) and 244 (2013) Class B shares	9,794	8,074
Total Stockholders' Equity	8,467	9,966
Total Liabilities and Stockholders' Equity	26,115	26,387
CBS Corporation excluding Outdoor Americas Inc [Member]
Liablities and Stockholders' Equity [Abstract]
Long-term debt (Note 7)	5,850	5,940
Outdoor Americas Inc [Member]
Liablities and Stockholders' Equity [Abstract]
Long-term debt (Note 7)	1,598	0
Class A Common Stock
Stockholders' Equity:
Common stock	0	0
Class B Common Stock
Stockholders' Equity:
Common stock	$ 1	$ 1