Paramount Global (PARA) 10-K 13 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2014	Feb. 10, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	CBS Corporation
Entity Central Index Key	813828
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Amendment Flag	FALSE
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Document Type	10-K
Document Period End Date	31-Dec-14
Class of Stock [Line Items]
Entity Public Float		$32,764,308,589
Common Class A [Member]
Class of Stock [Line Items]
Common Stock Outstanding			37,826,904
Entity Public Float		489,547,031
Common Class B [Member]
Class of Stock [Line Items]
Common Stock Outstanding			459,445,346
Entity Public Float		$32,274,761,558

Consolidated_Statements_of_Ope

Consolidated Statements of Operations (USD $)	12 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Revenues	$13,806,000,000	$14,005,000,000	$12,820,000,000
Costs and Expenses [Abstract]
Operating	8,089,000,000	8,124,000,000	7,264,000,000
Selling, general and administrative	2,462,000,000	2,546,000,000	2,442,000,000
Restructuring charges (Note 5)	26,000,000	20,000,000	19,000,000
Impairment charges (Note 3)	52,000,000	0	11,000,000
Depreciation and amortization	281,000,000	290,000,000	306,000,000
Total expenses	10,910,000,000	10,980,000,000	10,042,000,000
Operating income	2,896,000,000	3,025,000,000	2,778,000,000
Interest expense	-363,000,000	-375,000,000	-401,000,000
Interest income	13,000,000	8,000,000	5,000,000
Net loss on early extinguishment of debt (Note 9)	-352,000,000	0	-32,000,000
Other items, net	-30,000,000	7,000,000	7,000,000
Earnings from continuing operations before income taxes and equity in loss of investee companies	2,164,000,000	2,665,000,000	2,357,000,000
Provision for income taxes	-762,000,000	-878,000,000	-812,000,000
Equity in loss of investee companies, net of tax	-48,000,000	-49,000,000	-37,000,000
Net earnings from continuing operations	1,354,000,000	1,738,000,000	1,508,000,000
Net earnings from discontinued operations, net of tax (Note 4)	1,605,000,000	141,000,000	66,000,000
Net earnings	$2,959,000,000	$1,879,000,000	$1,574,000,000
Basic net earnings per common share:
Basic net earnings from continuing operation (in dollars per share)	$2.46	$2.86	$2.35
Basic net earnings from discontinued operations (in dollars per share)	$2.92	$0.23	$0.10
Basic net earnings (in dollars per share)	$5.38	$3.09	$2.45
Diluted net earnings per common share:
Diluted net earnings from continuing operations (in dollars per share)	$2.41	$2.79	$2.29
Diluted net earnings from discontinued operations (in dollars per share)	$2.86	$0.23	$0.10
Diluted net earnings (in dollars per share)	$5.27	$3.01	$2.39
Weighted average number of shares outstanding [Abstract]
Basic weighted average number of common shares outstanding	550	608	642
Diluted weighted average number of common shares outstanding	561	624	659
Dividends per common share (in dollars per share)	$0.54	$0.48	$0.44

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net earnings	$413	$1,639	$439	$468	$470	$494	$472	$443	$2,959	$1,879	$1,574
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Total other comprehensive income (loss), net of tax									-190	24	-130
Other comprehensive income (loss), before reclassifications, net of tax									-183	158
Reclassifications from accumulated other comprehensive income (loss) to net earnings									-7	-134
Total comprehensive income (loss)									2,769	1,903	1,444
Continuing Operations [Member]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative translation adjustment									-8	-2	9
Net actuarial gain (loss) and prior service cost									-163	207	-136
Unrealized gain on securities									-3	1	0
Changes in fair value of cash flow hedges									-1	0	0
Total other comprehensive income (loss), net of tax									-175	206	-127
Discontinued Operations [Member]
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Total other comprehensive income (loss), net of tax									-15	-182	-3
Other comprehensive income (loss), before reclassifications, net of tax									15	-4	-3
Reclassifications from accumulated other comprehensive income (loss) to net earnings									($30)	($178)	$0

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current Assets
Cash and cash equivalents	$428	$368
Receivables, less allowances of $50 (2014) and $60 (2013)	3,459	3,234
Programming and other inventory (Note 6)	922	772
Deferred income tax assets, net (Note 13)	104	152
Prepaid income taxes	161	0
Prepaid expenses	129	109
Other current assets	386	384
Current assets of discontinued operations (Note 4)	0	351
Total current assets	5,589	5,370
Property and equipment	3,164	3,060
Less accumulated depreciation and amortization	1,731	1,599
Net property and equipment (Note 2)	1,433	1,461
Programming and other inventory (Note 6)	1,817	1,697
Goodwill (Note 3)	6,698	6,588
Intangible assets (Note 3)	6,008	5,870
Other assets (Note 1)	2,488	1,963
Assets held for sale (Note 3)	0	314
Assets of discontinued operations (Note 4)	39	3,124
Total Assets	24,072	26,387
Current Liabilities
Accounts payable	302	286
Accrued expenses	605	595
Accrued compensation	333	376
Participants' share and royalties payable	999	1,008
Program rights	404	398
Deferred revenues	206	269
Income taxes payable	0	54
Commercial paper (Note 9)	616	475
Current portion of long-term debt (Note 9)	20	20
Other current liabilities	522	472
Current liabilities of discontinued operations (Note 4)	26	254
Total current liabilities	4,033	4,207
Long-term debt (Note 9)	6,510	5,940
Participants' share and royalties payable	1,267	1,122
Pension and postretirement benefit obligations (Note 14)	1,564	1,327
Deferred income tax liabilities, net (Note 13)	1,530	1,314
Other liabilities	2,080	2,034
Liabilities of discontinued operations (Note 4)	118	477
Commitments and contingencies (Note 15)
Stockholders' Equity
Common stock	1	1
Additional paid-in capital	44,041	43,474
Accumulated deficit	-21,931	-24,890
Accumulated other comprehensive loss (Note 1)	-735	-545
Stockholder' equity including treasury stock	21,376	18,040
Less treasury stock, at cost; 349 (2014) and 244 (2013) Class B Shares	14,406	8,074
Total Stockholders' Equity	6,970	9,966
Total Liabilities and Stockholders' Equity	24,072	26,387
Common Class A [Member]
Stockholders' Equity
Common stock	0	0
Common Class B [Member]
Stockholders' Equity
Common stock	$1	$1

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Balance Sheet Parentheticals [Abstract]
Allowances for receivables	$50	$60
Common Class A [Member]
Class of Stock [Line Items]
Common Stock, par value (in dollars per share)	$0.00	$0.00
Common Stock, shares authorized	375,000,000	375,000,000
Common Stock, shares issued	38,000,000	39,000,000
Common Class B [Member]
Class of Stock [Line Items]
Common Stock, par value (in dollars per share)	$0.00	$0.00
Common Stock, shares authorized	5,000,000,000	5,000,000,000
Common Stock, shares issued	818,000,000	801,000,000
Treasury Stock, at cost, Class B Shares	349,000,000	244,000,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Activities:
Net earnings (loss)	$2,959,000,000	$1,879,000,000	$1,574,000,000
Less: Net earnings (loss) from discontinued operations	1,605,000,000	141,000,000	66,000,000
Net earnings (loss) from continuing operations	1,354,000,000	1,738,000,000	1,508,000,000
Adjustments to reconcile net earnings from continuing operations to net cash flow provided by operating activities from continuing operations:
Depreciation and amortization	281,000,000	290,000,000	306,000,000
Impairment charges	52,000,000	0	11,000,000
Deferred tax provision (benefit)	692,000,000	433,000,000	453,000,000
Stock-based compensation	154,000,000	222,000,000	147,000,000
Redemption of debt	-8,000,000	0	-28,000,000
Net gain on disposition and write-down of assets	-12,000,000	-3,000,000	-2,000,000
Equity in loss of investee companies, net of tax and distributions	57,000,000	57,000,000	48,000,000
Amortization of deferred financing costs	9,000,000	10,000,000	12,000,000
Change in assets and liabilities, net of investing and financing activities
Increase in receivables	-600,000,000	-777,000,000	-237,000,000
(Increase) decrease in inventory and related program and participation liabilities, net	-213,000,000	48,000,000	-414,000,000
Decrease (increase) in other assets	34,000,000	-19,000,000	28,000,000
Decrease in accounts payable and accrued expenses	-152,000,000	-135,000,000	-25,000,000
Decrease in pension and postretirement benefit obligations	-34,000,000	-188,000,000	-190,000,000
(Decrease) increase in income taxes	-390,000,000	9,000,000	-75,000,000
(Decrease) increase in deferred revenue	-47,000,000	90,000,000	-29,000,000
Other, net	33,000,000	4,000,000	-8,000,000
Net cash flow provided by operating activities from continuing operations	1,210,000,000	1,779,000,000	1,505,000,000
Net cash flow provided by operating activities from discontinued operations	65,000,000	94,000,000	310,000,000
Net cash flow provided by operating activities	1,275,000,000	1,873,000,000	1,815,000,000
Investing Activities:
Acquisitions, net of cash acquired	-27,000,000	-20,000,000	-146,000,000
Capital expenditures	-206,000,000	-212,000,000	-200,000,000
Investments in and advances to investee companies	-98,000,000	-176,000,000	-91,000,000
Proceeds from sale of investments	12,000,000	30,000,000	13,000,000
Proceeds from dispositions	7,000,000	164,000,000	49,000,000
Other investing activities	-4,000,000	0	0
Net cash flow used for investing activities from continuing operations	-316,000,000	-214,000,000	-375,000,000
Net cash flow used for investing activities from discontinued operations	-285,000,000	-58,000,000	-76,000,000
Net cash flow used for investing activities	-601,000,000	-272,000,000	-451,000,000
Financing Activities:
Proceeds from short-term debt borrowings, net	141,000,000	475,000,000	0
Proceeds from issuance of notes	1,728,000,000	0	1,566,000,000
Repayment of notes and debentures	-1,152,000,000	0	-1,583,000,000
Payment of capital lease obligations	-17,000,000	-17,000,000	-19,000,000
Payment of contingent consideration	0	-30,000,000	-33,000,000
Dividends	-292,000,000	-300,000,000	-276,000,000
Purchase of Company common stock	-3,595,000,000	-2,185,000,000	-1,137,000,000
Payment of payroll taxes in lieu of issuing shares for stock-based compensation	-146,000,000	-145,000,000	-105,000,000
Proceeds from exercise of stock options	283,000,000	146,000,000	168,000,000
Excess tax benefit from stock-based compensation	243,000,000	148,000,000	103,000,000
Other financing activities	-3,000,000	-4,000,000	0
Net cash flow provided by (used for) financing activities from continuing operations	-2,810,000,000	-1,912,000,000	-1,316,000,000
Net cash flow provided by financing activities from discontinued operations	2,167,000,000	0	0
Net cash flow used for financing activities	-643,000,000	-1,912,000,000	-1,316,000,000
Net increase (decrease) in cash and cash equivalents	31,000,000	-311,000,000	48,000,000
Cash and cash equivalents, including discontinued operations, at beginning of period	397,000,000	708,000,000	660,000,000
Cash and cash equivalents, including discontinued operations, at end of period	$428,000,000	$397,000,000	$708,000,000

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Statement of Cash Flows [Abstract]
Cash and cash equivalents of discontinued operations	$29	$21	$38

Consolidated_Statements_of_Sto

Consolidated Statements of Stockholders' Equity (USD $)	Total	Common Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]
		Common Class A [Member]	Common Class B [Member]
Balance, beginning of year at Dec. 31, 2011		$0	$1,000,000	$43,395,000,000	($28,343,000,000)	($439,000,000)	($4,706,000,000)
Balance, beginning of year, shares at Dec. 31, 2011		44,000,000	769,000,000				162,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of A into B shares, increase, shares	300,000	-1,000,000	1,000,000
Restricted stock unit vests, shares			8,000,000
Exercise of stock options, shares			10,000,000
Class B Common Stock purchased, shares							36,000,000
Outdoor Americas Split-Off, shares							0
Shares paid for tax withholding for stock-based compensation, shares							3,000,000
Issuance of stock for deferred compensation, shares							0
Retirement of treasury stock, shares			-3,000,000				-3,000,000
Conversion of A shares into B shares		0	0
Stock-based compensation				147,000,000
Tax benefit related to employee stock-based transactions				104,000,000
Restricted stock unit vests			0
Exercise of stock options			0	170,000,000
Retirement of treasury stock			0	-105,000,000			105,000,000
Dividends	-287,000,000			-287,000,000
Gain on Outdoor Americas IPO				0
Net earnings (loss)	1,574,000,000				1,574,000,000
Other comprehensive income (loss)	-130,000,000					-130,000,000
Class B Common Stock purchased, value							-1,170,000,000
Outdoor Americas Split-Off	0						0
Shares paid for tax withholding for stock-based compensation							-105,000,000
Issuance of stock for deferred compensation							2,000,000
Balance, end of year at Dec. 31, 2012	10,213,000,000	0	1,000,000	43,424,000,000	-26,769,000,000	-569,000,000	-5,874,000,000
Balance, end of year, shares at Dec. 31, 2012		43,000,000	785,000,000				198,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of A into B shares, increase, shares	4,000,000	-4,000,000	4,000,000
Restricted stock unit vests, shares			7,000,000
Exercise of stock options, shares			8,000,000
Class B Common Stock purchased, shares							46,000,000
Outdoor Americas Split-Off, shares							0
Shares paid for tax withholding for stock-based compensation, shares							3,000,000
Issuance of stock for deferred compensation, shares							0
Retirement of treasury stock, shares			-3,000,000				-3,000,000
Conversion of A shares into B shares		0	0
Stock-based compensation				187,000,000
Tax benefit related to employee stock-based transactions				159,000,000
Restricted stock unit vests			0
Exercise of stock options			0	144,000,000
Retirement of treasury stock			0	-145,000,000			145,000,000
Dividends	-295,000,000			-295,000,000
Gain on Outdoor Americas IPO				0
Net earnings (loss)	1,879,000,000				1,879,000,000
Other comprehensive income (loss)	24,000,000					24,000,000
Class B Common Stock purchased, value							-2,201,000,000
Outdoor Americas Split-Off	0						0
Shares paid for tax withholding for stock-based compensation							-145,000,000
Issuance of stock for deferred compensation							1,000,000
Balance, end of year at Dec. 31, 2013	9,966,000,000	0	1,000,000	43,474,000,000	-24,890,000,000	-545,000,000	-8,074,000,000
Balance, end of year, shares at Dec. 31, 2013		39,000,000	801,000,000				244,000,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of A into B shares, increase, shares	1,300,000	-1,000,000	1,000,000
Restricted stock unit vests, shares			5,000,000
Exercise of stock options, shares	13,534,632		14,000,000
Class B Common Stock purchased, shares	60,300,000						60,000,000
Outdoor Americas Split-Off, shares							45,000,000
Shares paid for tax withholding for stock-based compensation, shares							3,000,000
Issuance of stock for deferred compensation, shares							0
Retirement of treasury stock, shares			-3,000,000				-3,000,000
Conversion of A shares into B shares		0	0
Stock-based compensation				168,000,000
Tax benefit related to employee stock-based transactions				246,000,000
Restricted stock unit vests			0
Exercise of stock options			0	282,000,000
Retirement of treasury stock			0	-146,000,000			146,000,000
Dividends	-296,000,000			-296,000,000
Gain on Outdoor Americas IPO				313,000,000
Net earnings (loss)	2,959,000,000				2,959,000,000
Other comprehensive income (loss)	-190,000,000					-190,000,000
Class B Common Stock purchased, value	-3,612,000,000						-3,612,000,000
Outdoor Americas Split-Off	-2,721,000,000						-2,721,000,000
Shares paid for tax withholding for stock-based compensation							-146,000,000
Issuance of stock for deferred compensation							1,000,000
Balance, end of year at Dec. 31, 2014	$6,970,000,000	$0	$1,000,000	$44,041,000,000	($21,931,000,000)	($735,000,000)	($14,406,000,000)
Balance, end of year, shares at Dec. 31, 2014		38,000,000	818,000,000				349,000,000

Basis_of_Presentation_and_Summ

Basis of Presentation and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	1) BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Description of Business—CBS Corporation (together with its consolidated subsidiaries unless the context otherwise requires, the “Company” or “CBS Corp.”) is comprised of the following segments: Entertainment (CBS Television, comprised of the CBS Television Network, CBS Television Studios, and CBS Global Distribution Group; CBS Interactive; and CBS Films), Cable Networks (Showtime Networks, CBS Sports Network and Smithsonian Networks), Publishing (Simon & Schuster) and Local Broadcasting (CBS Television Stations and CBS Radio).
	Discontinued Operations—On April 2, 2014, CBS Outdoor Americas Inc. (“Outdoor Americas”), which was previously a subsidiary of the Company and has been renamed Outfront Media Inc., completed an initial public offering (“IPO”) through which it sold 23.0 million shares, or approximately 19%, of its common stock. On July 16, 2014, the Company completed the split-off of Outdoor Americas through which the Company accepted 44.7 million shares of CBS Corp. Class B Common Stock from its stockholders in exchange for the 97.0 million shares, or approximately 81%, of Outdoor Americas common stock that it owned (the "Split-Off"). During 2013, the Company completed the sale of its outdoor advertising business in Europe, which included an interest in an outdoor business in Asia (“Outdoor Europe”). Outdoor Americas and Outdoor Europe have been presented as discontinued operations in the Company’s consolidated financial statements (See Note 4). In addition, certain businesses that were previously disposed of by the Company prior to January 1, 2002, were accounted for as discontinued operations in accordance with accounting rules in effect prior to 2002.
	Principles of Consolidation—The consolidated financial statements include the accounts of CBS Corp. and all of its subsidiaries in which a controlling interest is maintained. Controlling interest is determined by majority ownership interest and the absence of substantive third party participating rights.  Investments over which the Company has a significant influence or ownership of more than 20% but less than or equal to 50%, without a controlling interest, are accounted for under the equity method.  Investments of 20% or less, over which the Company has no significant influence, are accounted for under the cost method if the fair value is not readily determinable and are accounted for as available for sale securities if the fair value is readily determinable. All significant intercompany transactions have been eliminated.
	Reclassifications—Certain amounts reported for prior years have been reclassified to conform to the current year’s presentation.
	Use of Estimates—The preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period.  The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
	Cash and Cash Equivalents—Cash and cash equivalents consist of cash on hand and short-term (maturities of three months or less at the date of purchase) highly liquid investments, including money market funds, commercial paper and bank time deposits.
	Programming Inventory—The Company acquires rights to programming and produces programming to exhibit on its broadcast and cable networks, broadcast television and radio stations, and in theaters.  The costs incurred in acquiring and producing programs are capitalized and amortized over the license period or projected useful life of the programming.  Program rights and the related liabilities are recorded at the gross amount of the liabilities when the license period has begun, the cost of the program is determinable, and the program is accepted and available for airing.
	Television production costs (which include direct production costs, production overhead and acquisition costs) are stated at the lower of unamortized cost or net realizable value. The Company then estimates total revenues to be earned and costs to be incurred throughout the life of each television program.  For television programming, estimates for remaining total lifetime revenues are limited to the amount of revenue contracted for each episode in the initial market. Accordingly, television programming costs and participation costs incurred in excess of the amount of revenue contracted for each episode in the initial market are expensed as incurred on an episode by episode basis. Estimates for all secondary market revenues such as domestic and foreign syndication, basic cable, digital streaming, home entertainment and merchandising are included in the estimated lifetime revenues of such television programming once it can be demonstrated that a program can be successfully licensed in such secondary market. Television programming costs incurred subsequent to the establishment of the secondary market are initially capitalized and amortized, and estimated liabilities for participations are accrued, based on the proportion that current period revenues bear to the estimated remaining total lifetime revenues.
	The costs incurred in acquiring television series and feature film programming are capitalized when the program is accepted and available for airing.  These costs are amortized over the period in which an economic benefit is expected to be derived based on the timing of the Company’s usage of and benefit from such programming.  The costs of programming rights licensed under multi-year sports programming agreements are capitalized if the rights payments are made before the related economic benefit has been received.  These costs are expensed over the period in which an economic benefit is expected to be derived based on the relative value of the events broadcast by the Company during a period.  The relative value for an event is determined based on the revenues generated for that event in relation to the estimated total revenues over the remaining term of the sports programming agreement.  For the Company’s multi-year sports programming agreements where the rights payments for a season approximate the relative value of the events broadcast by the Company during that season, those rights payments are expensed during such season.
	Lifetime revenue estimates for internally produced television programming, and the estimated economic benefit for the acquired programming, including revenue projections for multi-year sports programming, are periodically reviewed. Adjustments, if any, will result in changes to amortization rates, future net realizable value adjustments and/or estimated accruals for participation expense.
	Property and Equipment—Property and equipment is stated at cost.  Depreciation is computed by the straight-line method over estimated useful lives as follows:
	Buildings	20 to 40 years
	Leasehold Improvements	Shorter of lease term or useful life
	Equipment and other (including capital leases)	3 to 20 years
	Impairment of Long-Lived Assets—The Company assesses long-lived assets and intangible assets, other than goodwill and intangible assets with indefinite lives, for impairment whenever there is an indication that the carrying amount of the asset may not be recoverable.  Recoverability of these assets is determined by comparing the forecasted undiscounted cash flows expected to be generated by these assets, which is the estimated fair value, to their net carrying value. The amount of impairment loss, if any, will generally be measured by the difference between the net carrying value and the estimated fair value of the asset.
	Impairment of Investments—Investments are reviewed for impairment on a quarterly basis by comparing their fair value to their respective carrying amounts. The Company determines the fair value of its public company investments by reference to their publicly traded stock price. With respect to private company investments, the Company makes its estimate of fair value by considering recent investee equity transactions, discounted cash flow analyses, recent operating results, estimates based on comparable public company operating cash flow multiples and, in certain situations, balance sheet liquidation values.  If the fair value of the investment has dropped below the carrying amount, management considers several factors when determining whether an other-than-temporary decline has occurred.  These factors include the length of time and the extent to which the estimated fair value or market value has been below the carrying value, the financial condition and the near-term prospects of the investee, the intent and ability of the Company to retain its investment in the investee for a period of time sufficient to allow for any anticipated recovery in market value, and other factors influencing the fair market value, such as general market conditions.
	Goodwill and Intangible Assets—Goodwill is allocated to various reporting units, which are generally one level below the Company’s operating segments. Intangible assets with finite lives, which primarily consist of trade names, are generally amortized using the straight-line method over their estimated useful lives, which range from 4 to 40 years.  Goodwill and other intangible assets with indefinite lives, which consist of FCC licenses, are not amortized but are tested for impairment on an annual basis and between annual tests if events occur or circumstances change that would more likely than not reduce the fair value below its carrying amount.  If the carrying value of goodwill or the intangible asset exceeds its fair value, an impairment loss is recognized as a noncash charge.
	Other Assets—Other assets include noncurrent receivables of $1.94 billion at December 31, 2014 and $1.56 billion at December 31, 2013, which are primarily related to revenues recognized under long-term television licensing arrangements. Television license fee revenues are recognized at the beginning of the license period in which programs are made available to the licensee for exhibition, while the related cash is collected over the term of the license period.
	Other Liabilities—Other liabilities consist primarily of the noncurrent portion of residual liabilities of previously disposed businesses, program rights obligations, deferred compensation and other employee benefit accruals.
	Revenue Recognition—Advertising revenues, net of agency commissions, are recognized in the period during which advertising spots are aired or displayed.  If there is a guarantee to deliver a targeted audience rating, revenues are recognized for the actual audience rating delivered, based on the ratings data published by independent audience ratings measurement companies.  Revenues are deferred for any shortfall in the audience rating with respect to an advertising spot until such time as the required audience rating is delivered.
	Revenues from the licensing of television programming are recognized in the period that the television series is made available to the licensee, which may cause fluctuations in operating results.  Television series initially produced for networks and first-run syndication are generally licensed to domestic and international markets concurrently.  The more successful network series are later licensed for digital streaming and to television stations, cable networks, and additional international markets.  The length of the revenue cycle for television series will vary depending on the number of seasons a series remains in active production.
	Affiliate and subscription fees for cable and broadcast networks, television stations and online content are recognized in the period the service is provided.  Costs for advertising and marketing services provided to the Company by cable, satellite and other distributors are recorded in selling, general and administrative expenses.
	Publishing revenues are recognized when merchandise is shipped or electronically delivered to the consumer.  The Company records a provision for sales returns and allowances at the time of sale based upon historical trends which allow for a percentage of revenue recognized.
	Deferred revenues primarily consist of revenues related to advertising arrangements and the licensing of television programming for which the revenues have not yet been earned.  The amounts classified as current are expected to be earned within the next twelve months.
	Sales of Multiple Products or Services—Revenues derived from a single sales contract that contains multiple products and services are allocated based on the relative fair value of each delivered item and recognized in accordance with the applicable revenue recognition criteria for the specific unit of accounting.
	Collaborative Arrangements—Collaborative arrangements primarily consist of joint efforts with third parties to produce and distribute programming such as television series and live sporting events, including the 14-year agreement between the Company and Turner Broadcasting System, Inc. to telecast the NCAA Division I Men’s Basketball Championship (“NCAA Tournament”), which began in 2011.  In connection with this agreement for the NCAA Tournament, advertisements aired on the CBS Television Network are recorded as revenues and the Company’s share of the program rights fees and other operating costs are recorded as operating expenses.
	For episodic television programming, co-production costs are initially capitalized as programming inventory and amortized over the television series’ estimated economic life.  In such arrangements where the Company has distribution rights, all proceeds generated from such distribution are recorded as revenues and any participation profits due to third party collaborators are recorded as operating expenses.  In co-production arrangements where third party collaborators have distribution rights, the Company’s net participating profits are recorded as revenues.
	Amounts attributable to transactions arising from collaborative arrangements between participants were not material to the Company’s consolidated financial statements for all periods presented.
	Advertising—Advertising costs are expensed as incurred. The Company incurred total advertising expenses of $410 million in 2014, $449 million in 2013 and $419 million in 2012.
	Interest—Costs associated with the refinancing or issuance of debt, as well as debt discounts or premiums, are recorded as interest over the term of its related debt.  The Company may enter into interest rate exchange agreements; the amount to be paid or received under such agreements is accrued and recognized over the life of the agreements as an adjustment to interest expense.
	Income Taxes—The provision for income taxes includes federal, state, local, and foreign taxes. Deferred tax assets and liabilities are recognized for the estimated future tax effects of temporary differences between the financial statement carrying amounts and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. The Company evaluates the realizability of deferred tax assets and establishes a valuation allowance when it is more likely than not that all or a portion of deferred tax assets will not be realized. For tax positions taken in a previously filed tax return or expected to be taken in a future tax return, the Company evaluates each position to determine whether it is more likely than not that the tax position will be sustained upon examination, based on the technical merits of the position. A tax position that meets the more-likely-than-not recognition threshold is subject to a measurement assessment to determine the amount of benefit to recognize in the Consolidated Statement of Operations and the appropriate reserve to establish, if any. If a tax position does not meet the more-likely-than-not recognition threshold a tax reserve is established and no benefit is recognized.  A number of years may elapse before a tax return containing tax matters for which a reserve has been established is audited and finally resolved.
	Foreign Currency Translation and Transactions—The Company’s assets and liabilities denominated in foreign currencies are translated at foreign exchange rates in effect at the balance sheet date, while results of operations are translated at average foreign exchange rates for the respective periods.  The resulting translation gains or losses are included as a separate component of stockholders’ equity in accumulated other comprehensive income (loss).  Foreign currency transaction gains and losses have been included in “Other items, net” in the Consolidated Statements of Operations.
	Other items, net—For all periods presented, "Other items, net" primarily consisted of foreign exchange gains and losses.
	Provision for Doubtful Accounts—The provision for doubtful accounts is estimated based on historical bad debt experience, the aging of accounts receivable, industry trends and economic indicators, as well as recent payment history for specific customers.  The provision for doubtful accounts charged to expense was $9 million in 2014 and $14 million in each of 2013 and 2012.
	Net Earnings (Loss) per Common Share—Basic earnings (loss) per share (“EPS”) is based upon net earnings (loss) divided by the weighted average number of common shares outstanding during the period.  Diluted EPS reflects the effect of the assumed exercise of stock options and vesting of restricted stock units (“RSUs”) and market-based performance share units (“PSUs”) only in the periods in which such effect would have been dilutive.  Stock options to purchase 2 million shares of Class B Common Stock for each of the years ended December 31, 2014 and 2013, and stock options to purchase 4 million shares of Class B Common Stock for the year ended December 31, 2012, were outstanding but excluded from the calculation of diluted EPS because their inclusion would have been anti-dilutive.
	The table below presents a reconciliation of weighted average shares used in the calculation of basic and diluted EPS.
	Year Ended December 31,	2014			2013			2012
	(in millions)
	Weighted average shares for basic EPS	550			608			642
	Dilutive effect of shares issuable under stock-based compensation plans	11			16			17
	Weighted average shares for diluted EPS	561			624			659
	Accumulated Other Comprehensive Income —The following table presents the changes in the components of accumulated other comprehensive income (loss).
		Continuing Operations														Discontinued Operations
						Net Actuarial							Change in							Accumulated
		Cumulative				Gain (Loss)				Unrealized			Fair Value of			Other				Other
		Translation				and Prior				Gain on			Cash Flow			Comprehensive				Comprehensive
		Adjustments				Service Cost				Securities			Hedges			Income (Loss)			(b)	Loss
	At December 31, 2011	$	159			$	(800	)		$	2		$	—		$	200			$	(439	)
	Other comprehensive income (loss)	9				(136		)		—			—			(3		)		(130		)
	At December 31, 2012	168				(936		)		2			—			197				(569		)
	Other comprehensive income (loss) before reclassifications	(2		)		163				1			—			(4		)		158
	Reclassifications to net earnings	—				44			(a)	—			—			(178		)	(c)	(134		)
	Other comprehensive income (loss)	(2		)		207				1			—			(182		)		24
	At December 31, 2013	166				(729		)		3			—			15				(545		)
	Other comprehensive income (loss) before reclassifications	(8		)		(189		)		—			(1		)	15				(183		)
	Reclassifications to net earnings	—				26			(a)	(3		)	—			(30		)	(c)	(7		)
	Other comprehensive loss	(8		)		(163		)		(3		)	(1		)	(15		)		(190		)
	At December 31, 2014	$	158			$	(892	)		$	—		$	(1	)	$	—			$	(735	)
	(a) Reflects amortization of net actuarial losses. See Note 14.
	(b) Primarily reflects cumulative translation adjustments.
	(c) Reclassified in connection with the disposal of Outdoor Americas in 2014 and Outdoor Europe in 2013. See Note 4.
	The net actuarial gain (loss) and prior service cost related to pension and other postretirement benefit plans included in other comprehensive income (loss) is net of a tax benefit (provision) for the years ended December 31, 2014, 2013 and 2012 of $105 million, $(132) million and $80 million, respectively, and other comprehensive loss from discontinued operations is net of a tax (provision) benefit of $(3) million and $1 million for the years ended December 31, 2013 and 2012, respectively. For the year ended December 31, 2014, the tax provision related to the other comprehensive loss from discontinued operations was minimal. The tax provision related to the unrealized gain on securities is minimal for all periods presented.
	Stock-based Compensation—The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award.  The cost is recognized over the vesting period during which an employee is required to provide service in exchange for the award.
The following table summarizes the Company’s stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012.
Year Ended December 31,	2014				2013				2012
RSUs and PSUs	$	131			$	129			$	105
Stock options and equivalents	23				93				42
Stock-based compensation expense, before income taxes	154				222				147
Related tax benefit	(60		)		(86		)		(57		)
Stock-based compensation expense, net of tax benefit	$	94			$	136			$	90
Stock-based compensation included in net earnings from discontinued operations was $5 million, $15 million and $7 million for 2014, 2013, and 2012, respectively.
Adoption of New Accounting Standards
Presentation of Reserves for Uncertain Tax Positions when a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists
During the first quarter of 2014, the Company adopted Financial Accounting Standards Board ("FASB") guidance on the presentation of the reserve for uncertain tax positions when a net operating loss carryforward, a similar tax loss, or a tax credit carryforward exists. This guidance requires the reserve for uncertain tax positions to be presented in the financial statements as a reduction to the deferred tax asset for a tax loss or other tax carryforward that would be applied in the settlement of the uncertain tax position. The adoption of this guidance did not have a material effect on the Company's consolidated financial statements.
Obligations Resulting from Joint and Several Liability Arrangements
During the first quarter of 2014, the Company adopted FASB guidance on the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date. Under this guidance, the Company is required to measure its obligations under such arrangements as the sum of the amount it agreed to pay in the arrangement among its co-obligors and any additional amount the Company expects to pay on behalf of its co-obligors. The Company is also required to disclose the nature and amount of the obligation. The adoption of this guidance did not have an effect on the Company's consolidated financial statements.
Recent Pronouncements
Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items
In January 2015, the FASB issued amended guidance which eliminates the concept of extraordinary items. This guidance removes the requirement to assess whether an event or transaction is both unusual in nature and infrequent in occurrence and to separately present any such items on the statement of operations after income from continuing operations. Rather, such items will either be presented as a separate component of income from continuing operations or disclosed in the notes to the financial statements. This guidance is effective for interim and annual periods beginning after December 15, 2015. Early adoption is permitted provided that the guidance is applied from the beginning of the fiscal year of adoption. Additionally, the Company is permitted to amend prior periods presented in the financial statements once the guidance is adopted.
Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern
In August 2014, the FASB issued guidance which requires management to evaluate, for each interim and annual reporting period, whether there are conditions or events that raise substantial doubt about an entity’s ability to continue as a going concern within one year after the date the financial statements are issued. If management identifies conditions or events that raise substantial doubt, disclosures are required in the financial statements, including any plans that will alleviate the substantial doubt about the entity’s ability to continue as a going concern. This guidance, which is effective for the first annual period ending after December 15, 2016, is not expected to have an impact on the Company’s consolidated financial statements.
Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period
In June 2014, the FASB issued guidance on the accounting for stock-based compensation when the terms of an award provide that a performance target that affects vesting could be achieved after the requisite service period. Under this guidance such performance target should not be reflected in estimating the grant-date fair value of the award. Compensation cost should be recognized in the period in which it becomes probable that the performance target will be achieved and should represent the compensation cost attributable to the period(s) for which the requisite service has already been rendered. This guidance, which is effective for interim and annual periods beginning after December 15, 2015, is not expected to have a material impact on the Company’s consolidated financial statements.
Revenue from Contracts with Customers
In May 2014, the FASB issued guidance on the recognition of revenues which provides a single, comprehensive revenue recognition model for all contracts with customers and supersedes most existing revenue recognition guidance. The main principle under this guidance is that an entity should recognize revenue at the amount it expects to be entitled to in exchange for the transfer of goods or services to customers. The Company is currently evaluating the impact of this guidance, which is effective for interim and annual reporting periods beginning after December 15, 2016 with early adoption not permitted.
Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity
In April 2014, the FASB issued amended guidance which changes the requirements for reporting discontinued operations and requires additional disclosures about discontinued operations and disposals of components of an entity that do not qualify for discontinued operations reporting. Under this guidance, only a disposal of a component of an entity or a group of components of an entity that represent a strategic shift that has (or will have) a major effect on the company’s operations and financial results should be reported in discontinued operations. The guidance also expands the definition of a discontinued operation to include a business or nonprofit activity that, on acquisition, meets the criteria to be classified as held for sale and disposals of equity method investments that meet the definition of discontinued operations. This guidance is effective prospectively for interim and annual periods beginning after December 15, 2014.

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property and Equipment	2) PROPERTY AND EQUIPMENT
	At December 31,	2014		2013
	Land	$	240	$	239
	Buildings	717		691
	Capital leases	165		165
	Equipment and other	2,042		1,965
		3,164		3,060
	Less accumulated depreciation and amortization	1,731		1,599
	Net property and equipment	$	1,433	$	1,461
	Depreciation expense, including capitalized lease amortization, was $249 million in 2014, $251 million in 2013 and $261 million in 2012.  Amortization expense related to capital leases was $17 million in each of 2014 and 2013 and $19 million in 2012. Accumulated amortization of capital leases was $78 million at December 31, 2014 and $62 million at December 31, 2013.

Goodwill_and_Other_Intangible_

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	3) GOODWILL AND OTHER INTANGIBLE ASSETS
	The Company performs an annual fair value-based impairment test of goodwill and intangible assets with indefinite lives, comprised of FCC licenses, during the fourth quarter and also between annual tests if an event occurs or if circumstances change that would more likely than not reduce the fair value of a reporting unit or an indefinite-lived intangible asset below its carrying value. Goodwill is tested for impairment at the reporting unit level, which is one level below or the same as an operating segment. FCC licenses are tested for impairment at the geographic market level. The Company considers each geographic market, which is comprised of all of the Company’s radio or television stations within that geographic market, to be a single unit of accounting because the FCC licenses at this level represent their highest and best use.
	For 2014, the Company performed qualitative assessments for five reporting units, five radio markets, and ten television markets which management estimates each have fair values that exceed their respective carrying values by 20% or more. For each reporting unit, the Company weighed the relative impact of factors that are specific to the reporting unit as well as industry and macroeconomic factors. For each radio and television market, the Company weighed the relative impact of market-specific and macroeconomic factors. Based on the qualitative assessments, considering the aggregation of the relevant factors, the Company concluded that it is not more likely than not that the fair values of these reporting units and the fair value of FCC licenses within each market are less than their respective carrying amounts. Therefore, performing the quantitative impairment test was unnecessary.
	For 2014, the Company performed the two-step quantitative goodwill impairment test for the remaining two reporting units, CBS Interactive and CBS Radio. The first step of the goodwill impairment test examines whether the carrying value of a reporting unit exceeds its fair value. If the carrying value exceeds the fair value, the second step of the test compares the implied fair value of a reporting unit’s goodwill with the carrying value of its goodwill to determine the amount of impairment charge, if any. The estimated fair value of each reporting unit for which step one of the impairment test is performed is computed based upon the present value of future cash flows (“Discounted Cash Flow Method”) and both the traded and transaction values of comparable businesses (“Market Comparable Method”). The Discounted Cash Flow Method and Market Comparable Method resulted in substantially equal fair values. The Discounted Cash Flow Method includes the Company’s assumptions for growth rates, operating margins and capital expenditures for the projection period plus the residual value of the business at the end of the projection period.  The estimated growth rates, operating margins and capital expenditures for the projection period are based on the Company’s internal forecasts of future performance as well as historical trends.  The residual value is estimated based on a perpetual nominal growth rate, which is based on projected long-range inflation and long-term industry projections, and for 2014 was 3.0% for CBS Interactive and 1.5% for CBS Radio.  The discount rates, which for 2014 were 9.5% for CBS Interactive and 8.0% for CBS Radio, are determined based on the average of the weighted average cost of capital of comparable entities.
	Based on the 2014 annual impairment test, for each of the two reporting units for which the Company performed the first step of the impairment test, the estimated fair values exceeded the respective carrying values and therefore the second step of the impairment test was unnecessary.
	For each of the remaining 21 radio and four television markets, the Company performed the quantitative impairment test that compares the estimated fair value of the FCC licenses by geographic market with their respective carrying values.  The estimated fair value of each FCC license is computed using the Greenfield Discounted Cash Flow Method (‘‘Greenfield Method’’), which attempts to isolate the income that is attributable to the license alone. The Greenfield Method is based upon modeling a hypothetical start-up station and building it up to a normalized operation that, by design, lacks inherent goodwill and whose other assets have essentially been added as part of the build-up process. The Greenfield Method adds the present value of the estimated annual cash flows of the start-up station over a projection period to the residual value at the end of the projection period. The annual cash flows over the projection period include assumptions for overall advertising revenues in the relevant geographic market, the start-up station’s operating costs and capital expenditures, and a three-year build-up period for the start-up station to reach a normalized state of operations, which reflects the point at which it achieves an average market share. In order to estimate the revenues of a start-up station, the total market advertising revenue in the subject market is estimated based on recent industry projections. Operating costs and capital expenditures are estimated based on both industry and internal data. The residual value is calculated using a perpetual nominal growth rate, which is based on projected long-range inflation in the U.S. and long-term industry projections. The discount rate is determined based on the average of the weighted average cost of capital of comparable entities in the broadcast industry.  For each television station and radio station, the discount rate used for 2014 was 8.0% and the perpetual nominal growth rates used were 2.5% and 1.5%, respectively.
	For its 2014 annual impairment test the Company concluded that the estimated fair values of the indefinite-lived intangible assets for which it performed a quantitative assessment exceeded the respective carrying values and therefore no impairment charge was required.
	In December 2014, in connection with its strategy to grow its major market presence, the Company completed a radio station swap with Beasley Broadcast Group, Inc. through which the Company exchanged 13 of its radio stations in Tampa and Charlotte as well as one radio station in Philadelphia, for two radio stations in Philadelphia and three radio stations in Miami. In connection with the radio station swap, the Company recorded a pretax noncash impairment charge of $52 million to reduce the carrying value of the allocated goodwill. The assets associated with the disposed radio stations, which primarily consist of goodwill and FCC licenses, have been presented as held for sale on the Company’s Consolidated Balance Sheets for all periods prior to the closing of the transaction.
	During 2012, in connection with the sale of its five owned radio stations in West Palm Beach, the Company recorded a pretax noncash impairment charge of $11 million to reduce the carrying value of the allocated goodwill.
	For the years ended December 31, 2014 and 2013, the changes in the book value of goodwill by segment were as follows:
			Balance at										Balance at
			31-Dec-13						Acquisitions				31-Dec-14
	Entertainment:
	Goodwill			$	9,467				$	—				$	9,467
	Accumulated impairment losses			(6,294		)			—					(6,294		)
	Goodwill, net of impairment			3,173					—					3,173
	Cable Networks:
	Goodwill			480					—					480
	Accumulated impairment losses			—					—					—
	Goodwill, net of impairment			480					—					480
	Publishing:
	Goodwill			406					—					406
	Accumulated impairment losses			—					—					—
	Goodwill, net of impairment			406					—					406
	Local Broadcasting:
	Goodwill			22,244					110			(a)		22,354
	Accumulated impairment losses			(19,715		)			—					(19,715		)
	Goodwill, net of impairment			2,529					110					2,639
	Total:
	Goodwill			32,597					110					32,707
	Accumulated impairment losses			(26,009		)			—					(26,009		)
	Goodwill, net of impairment			$	6,588				$	110				$	6,698
	(a) Amount primarily reflects goodwill acquired in the radio station swap with Beasley Broadcast Group, Inc. At December 31, 2013, the allocated goodwill, net of accumulated impairment relating to the stations disposed of in the swap was included in “Assets held for sale” on the Consolidated Balance Sheet and as a result is not included in the changes in book value above.
		Balance at														Balance at
		31-Dec-12						Acquisitions				Other				31-Dec-13
	Entertainment:
	Goodwill		$	9,460				$	7			$	—				$	9,467
	Accumulated impairment losses		(6,294		)			—				—					(6,294		)
	Goodwill, net of impairment		3,166					7				—					3,173
	Cable Networks:
	Goodwill		480					—				—					480
	Accumulated impairment losses		—					—				—					—
	Goodwill, net of impairment		480					—				—					480
	Publishing:
	Goodwill		407					—				(1		)			406
	Accumulated impairment losses		—					—				—					—
	Goodwill, net of impairment		407					—				(1		)			406
	Local Broadcasting:
	Goodwill		22,244					—				—					22,244
	Accumulated impairment losses		(19,715		)			—				—					(19,715		)
	Goodwill, net of impairment		2,529					—				—					2,529
	Total:
	Goodwill		32,591					7				(1		)			32,597
	Accumulated impairment losses		(26,009		)			—				—					(26,009		)
	Goodwill, net of impairment		$	6,582				$	7			$	(1	)			$	6,588
	The Company’s intangible assets were as follows:
						Accumulated
	At December 31, 2014	Gross				Amortization				Net
	Intangible assets subject to amortization:
	Trade names	$	220			$	(54	)		$	166
	Other intangible assets	167				(129		)		38
	Total intangible assets subject to amortization	387				(183		)		204
	FCC licenses (a)	5,804				—				5,804
	Total intangible assets	$	6,191			$	(183	)		$	6,008
					Accumulated
At December 31, 2013	Gross				Amortization				Net
Intangible assets subject to amortization:
Trade names	$	222			$	(42	)		$	180
Other intangible assets	211				(159		)		52
Total intangible assets subject to amortization	433				(201		)		232
FCC licenses (a)	5,638				—				5,638
Total intangible assets	$	6,071			$	(201	)		$	5,870
(a) The increase in FCC licenses from December 31, 2013 to December 31, 2014 relates to the radio stations acquired in the radio station swap with Beasley Broadcast Group, Inc. At December 31, 2013, the FCC licenses relating to the radio stations disposed of in the swap were included in “Assets held for sale” on the Consolidated Balance Sheet.
Amortization expense was $32 million in 2014, $39 million in 2013 and $45 million in 2012. The Company expects its aggregate annual amortization expense for existing intangible assets subject to amortization for each of the years, 2015 through 2019, to be as follows:
	2015				2016				2017				2018				2019
Amortization expense	$	24			$	19			$	15			$	13			$	13

Discontinued_Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	4) DISCONTINUED OPERATIONS
	On July 16, 2014, the Company completed the disposition of Outdoor Americas and, as a result, Outdoor Americas has been presented as a discontinued operation in the Company’s consolidated financial statements for all periods presented. In aggregate, the Company received $4.76 billion from the disposition of Outdoor Americas, including $2.04 billion of cash and $2.72 billion in shares of CBS Corp. Class B Common Stock that were accepted in the Split-Off. The disposition was completed in three phases. First, in January 2014, Outdoor Americas borrowed $1.60 billion and provided $1.52 billion of the proceeds to the Company. Next, on April 2, 2014, Outdoor Americas completed an IPO through which it sold 23.0 million shares, or approximately 19%, of its common stock for $28.00 per share. Proceeds from the IPO, net of underwriting discounts and commissions, aggregated $615 million, of which $515 million was provided to the Company. Upon completion of the IPO, the Company owned 97.0 million shares, or approximately 81% of Outdoor Americas. Finally, on July 16, 2014, the Company completed the disposition of its 81% ownership of Outdoor Americas common stock through a Split-Off. In connection with the Split-Off, the Company
	accepted 44.7 million shares of CBS Corp. Class B Common Stock from its stockholders in exchange for the 97.0 million shares of Outdoor Americas common stock that it owned. This transaction resulted in a gain of $1.56 billion for the year ended December 31, 2014 which is calculated as follows:
	Fair value of CBS Corp. Class B Common Stock accepted		$	2,721
	(44,723,131 shares at $60.85 per share on July 16, 2014)
	Carrying value of Outdoor Americas		(1,162		)
	Accumulated other comprehensive income		30
	Transaction costs		(32		)
	Net gain on split-off of Outdoor Americas		$	1,557
	The Split-Off was a tax-free transaction and therefore, there is no tax impact on the gain.
	During 2013, the Company completed the sale of Outdoor Europe for $225 million. Outdoor Europe has been presented as a discontinued operation for all periods presented. For 2013, net earnings from discontinued operations include a gain on the disposal of Outdoor Europe and an after-tax charge of $110 million related to Outdoor Europe. This charge was associated with exiting an unprofitable contractual arrangement and the estimated fair value of guarantees, which historically were intercompany but upon the closing of the transaction became third-party guarantees (See Note 15).
	The following table sets forth details of net earnings from discontinued operations for the years ended December 31, 2014, 2013 and 2012.
	Year Ended December 31,	2014				2013			2012
	Revenues from discontinued operations	$	677			$	1,695		$	1,873
	Earnings (loss) from discontinued operations	$	79			$	(12	)	$	128
	Income tax provision	(26		)		—			(62		)
	Earnings (loss) from discontinued operations, net of tax	53				(12		)	66
	Gain on disposal	1,557				159			—
	Income tax provision	—				(6		)	—
	Gain on disposal, net of tax	1,557				153			—
	Less: Net earnings from discontinued operations attributable to noncontrolling interest, net of tax	5				—			—
	Net earnings from discontinued operations attributable to CBS Corp.	$	1,605			$	141		$	66
	The following table presents the major classes of assets and liabilities of the Company’s discontinued operations.
	At December 31,	2014				2013
	Current assets	$	—			$	351
	Goodwill	—				1,866
	Intangible assets	—				366
	Net property and equipment	—				763
	Other assets	39				129
	Total Assets	$	39			$	3,475
	Current liabilities	$	26			$	254
	Other liabilities	118				477
	Total Liabilities	$	144			$	731
	Other liabilities of discontinued operations of $118 million and $477 million at December 31, 2014 and 2013, respectively, primarily include tax reserves related to previously disposed businesses and the carrying value of the guarantee liability associated with the disposition of Outdoor Europe of approximately $28 million and $40 million, respectively. At December 31, 2013, other liabilities of discontinued operations also included deferred tax liabilities related to Outdoor Americas.

Restructuring_Charges

Restructuring Charges	12 Months Ended
	Dec. 31, 2014
Restructuring Charges [Abstract]
Restructuring charges	5) RESTRUCTURING CHARGES
	During the year ended December 31, 2014, in a continued effort to reduce its cost structure, the Company initiated restructuring plans across several of its businesses, primarily for the reorganization or closure of certain business operations. As a result, the Company recorded restructuring charges of $26 million, reflecting $17 million of severance costs and $9 million of costs associated with exiting contractual obligations. During the year ended December 31, 2013, the Company recorded restructuring charges of $20 million, reflecting $14 million of severance costs and $6 million of costs associated with exiting contractual obligations. As of December 31, 2014, the cumulative amount paid for the 2014 and 2013 restructuring charges was $24 million, of which $17 million was for the severance costs and $7 million related to costs associated with exiting contractual obligations. The 2013 restructuring reserve was substantially utilized at December 31, 2014. The Company expects to substantially utilize the 2014 restructuring reserve by the end of 2015.
		Balance at				2014				2014			Balance at
		31-Dec-13				Charges				Payments			31-Dec-14
	Entertainment		$	8		$	8			$	(8	)		$	8
	Cable Networks		1			—				(1		)		—
	Publishing		1			1				(2		)		—
	Local Broadcasting		4			14				(6		)		12
	Corporate		1			3				(2		)		2
	Total		$	15		$	26			$	(19	)		$	22
			2013		2013			Balance at
			Charges		Payments			31-Dec-13
	Entertainment		$	12	$	(4	)		$	8
	Cable Networks		1		—				1
	Publishing		1		—				1
	Local Broadcasting		5		(1		)		4
	Corporate		1		—				1
	Total		$	20	$	(5	)		$	15

Programming_and_Other_Inventor

Programming and Other Inventory	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Programming and Other Inventory	6) PROGRAMMING AND OTHER INVENTORY
	At December 31,	2014		2013
	Program rights	$	1,471	$	1,331
	Television programming:
	Released (including acquired libraries)	983		878
	In process and other	179		139
	Theatrical programming:
	Released	23		38
	In process and other	36		32
	Publishing, primarily finished goods	47		51
	Total programming and other inventory	2,739		2,469
	Less current portion	922		772
	Total noncurrent programming and other inventory	$	1,817	$	1,697

Related_Parties

Related Parties	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Related Parties	7) RELATED PARTIES
	National Amusements, Inc. National Amusements, Inc. (“NAI”) is the controlling stockholder of CBS Corp. and Viacom Inc.  Mr. Sumner M. Redstone, the controlling stockholder, chairman of the board of directors and chief executive officer of NAI, is the Executive Chairman of the Board of Directors and founder of both CBS Corp. and Viacom Inc. In addition, Ms. Shari Redstone, Mr. Sumner M. Redstone’s daughter, is the president and a director of NAI and the vice chair of the Board of Directors of both CBS Corp. and Viacom Inc.  Mr. David R. Andelman is a director of CBS Corp. and serves as a director of NAI. Mr. Frederic V. Salerno is a director of CBS Corp. and serves as a director of Viacom Inc. At December 31, 2014, NAI directly or indirectly owned approximately 79.6% of CBS Corp.’s voting Class A Common Stock and owned approximately 7.8% of CBS Corp.’s Class A Common Stock and non-voting Class B Common Stock on a combined basis.
	Viacom Inc.  As part of its normal course of business, the Company licenses its television content, leases production facilities and sells advertising spots to various subsidiaries of Viacom Inc. Viacom Inc. also distributes certain of the Company's television programs in the home entertainment market. The Company’s total revenues from these transactions were $183 million, $185 million and $211 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	The Company places advertisements with and leases production facilities from various subsidiaries of Viacom Inc. The total amounts for these transactions were $19 million, $21 million and $26 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	The following table presents the amounts due from Viacom Inc. in the normal course of business as reflected on the Company’s Consolidated Balance Sheets. Amounts due to Viacom Inc. were minimal at December 31, 2014 and 2013.
	At December 31,	2014		2013
	Receivables	$	107	$	84
	Other assets (Receivables, noncurrent)	76		115
	Total amounts due from Viacom Inc.	$	183	$	199
	Other Related Parties  The Company has equity interests in two domestic television networks and several international joint ventures for television channels, from which the Company earns revenues primarily by selling its television programming.  Total revenues earned from sales to these joint ventures were $122 million, $108 million and $157 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	The Company, through the normal course of business, is involved in transactions with other related parties that have not been material in any of the periods presented.

Investments

Investments	12 Months Ended
	Dec. 31, 2014
Investments, All Other Investments [Abstract]
Investments	8) INVESTMENTS
	The Company accounts for investments over which it has significant influence or ownership of more than 20% but less than or equal to 50%, without a controlling interest, under the equity method. Such investments include the Company’s 50% interests in the broadcast network, The CW, and the entertainment cable network, POP (formerly known as TVGN, TV Guide Network). In addition, the Company has interests in several international television joint ventures including a 49% interest in a joint venture with a subsidiary of AMC Networks Inc., which owns and operates six cable and satellite channels in the United Kingdom and Ireland, including CBS branded channels; a 30% interest in a joint venture with another subsidiary of AMC Networks Inc., which owns and operates nine cable and satellite channels in Europe, the Middle East and Africa; a 33% interest in a joint venture with a subsidiary of Ten Network Holdings Limited to provide content to ELEVEN, a digital television channel service in Australia; and a 30% interest in a joint venture with RTL Group which owns and operates two cable channels in South East Asia.
	At December 31, 2014 and 2013, respectively, the Company had $199 million and $188 million of equity investments that are included in “Other assets” on the Consolidated Balance Sheets.
	Investments of 20% or less, over which the Company has no significant influence, that do not have a readily determinable fair value are accounted for under the cost method. At December 31, 2014 and 2013, respectively, the Company had $23 million and $16 million of cost investments that are included in “Other assets” on the Consolidated Balance Sheets.
	The Company invested $98 million, $176 million and $91 million into its equity and cost investments during the years ended December 31, 2014, 2013 and 2012, respectively.

Bank_Financing_and_Debt

Bank Financing and Debt	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Bank Financing and Debt	9) BANK FINANCING AND DEBT
	The Company's debt consists of the following (a):
	At December 31,	2014			2013
	Commercial paper	$	616		$	475
	8.875% Notes due 2014	—			99
	7.625% Senior Debentures due 2016	200			200
	1.95% Senior Notes due 2017	398			397
	4.625% Senior Notes due 2018	313			317
	8.875% Senior Notes due 2019	—			592
	2.30% Senior Notes due 2019	598			—
	5.75% Senior Notes due 2020	500			500
	4.30% Senior Notes due 2021	300			300
	3.375% Senior Notes due 2022	695			695
	7.875% Debentures due 2023	187			224
	7.125% Senior Notes due 2023 (b)	46			52
	3.70% Senior Notes due 2024	599			—
	7.875% Senior Debentures due 2030	839			1,270
	5.50% Senior Debentures due 2033	428			428
	5.90% Senior Notes due 2040	299			299
	4.85% Senior Notes due 2042	488			488
	4.90% Senior Notes due 2044	543			—
	Obligations under capital leases	97			113
	Total debt (c)	7,146			6,449
	Less discontinued operations debt (d)	—			14
	Total debt from continuing operations	7,146			6,435
	Less commercial paper	616			475
	Less current portion	20			20
	Total long-term debt from continuing operations, net of current portion	$	6,510		$	5,940
	(a) Unless otherwise noted, the long-term debt instruments are issuances of CBS Corp. and are guaranteed by CBS Operations Inc.
	(b) Debt instrument is an issuance of CBS Broadcasting Inc., a wholly owned subsidiary of CBS Corp., and has no guarantor.
	(c) At December 31, 2014 and December 31, 2013, the senior debt balances included (i) a net unamortized discount of $21 million and $13 million, respectively, and (ii) an increase in the carrying value of the debt relating to previously settled fair value hedges of $14 million and $18 million, respectively.  The face value of the Company’s total debt was $7.15 billion at December 31, 2014 and $6.44 billion at December 31, 2013.
	(d) Included in "Liabilities of discontinued operations" on the Consolidated Balance Sheets.
	For the year ended December 31, 2014, debt issuances, redemptions and repurchases were as follows:
	Debt Issuances
	August 2014, $600 million 2.30% senior notes due 2019
	August 2014, $600 million 3.70% senior notes due 2024
	August 2014, $550 million 4.90% senior notes due 2044
	Debt Redemptions
	$99 million 8.875% notes due 2014
	$264 million 8.875% senior notes due 2019
	Debt Repurchases
	$336 million 8.875% senior notes due 2019, through a tender offer
	$37 million 7.875% debentures due 2023, through a tender offer
	$6 million 7.125% senior notes due 2023, through a tender offer
	$423 million 7.875% senior debentures due 2030, through a tender offer
	The debt repurchases and early debt redemption resulted in a pretax loss on early extinguishment of debt of $352 million ($219 million, net of tax) for the year ended December 31, 2014.
	During January 2015, the Company issued $600 million of 3.50% senior notes due 2025 and $600 million of 4.60% senior notes due 2045 and used the net proceeds for the repurchase of CBS Corp. Class B Common Stock and repayment of short-term borrowings, including commercial paper.
	All of the Company’s long-term debt has been issued under fixed interest rate agreements. During 2014, in connection with the issuance of its $600 million of 2.30% senior notes due 2019, the Company entered into $600 million notional amount of fixed-to-floating rate swap agreements to hedge this debt. These interest rate swaps are designated as fair value hedges (See Note 10).
	At December 31, 2014, the Company’s scheduled maturities of long-term debt at face value, excluding capital leases, were as follows:
													2020 and
		2015		2016			2017		2018		2019		Thereafter
	Long-term debt	$	—	$	200		$	400	$	300	$	600	$	4,940
	Commercial Paper
	The Company had outstanding commercial paper borrowings under its commercial paper program of $616 million and $475 million at December 31, 2014 and 2013, respectively, at weighted average interest rates of 0.46% and 0.28%, respectively and with maturities of less than forty-five days. During December 2014, the Company increased its commercial paper program from $2.0 billion to $2.5 billion.
	Credit Facility
	During December 2014, the Company amended and restated its revolving credit facility (the “Credit Facility”) to increase the capacity from $2.0 billion to $2.5 billion and extend the expiration to December 2019. The provisions of the Credit Facility are substantially similar to those under the Company's previous credit facility. The Company, at its option, may also borrow in certain foreign currencies up to specified limits under the Credit Facility. Borrowing rates under the Credit Facility are determined at the Company’s option at the time of each borrowing and are based generally on the prime rate in the U.S. or the London Interbank Offer Rate (“LIBOR”) plus a margin based on the Company’s senior unsecured debt rating. The Company pays a facility fee based on the total amount of the commitments.
	The Credit Facility requires the Company to maintain a maximum Consolidated Leverage Ratio of 4.5x at the end of each quarter as further described in the Credit Facility. At December 31, 2014, the Company’s Consolidated Leverage Ratio was approximately 2.1x.
	The Consolidated Leverage Ratio reflects the ratio of the Company’s indebtedness from continuing operations, adjusted to exclude certain capital lease obligations, at the end of a quarter, to the Company’s Consolidated EBITDA for the trailing four consecutive quarters.  Consolidated EBITDA is defined in the Credit Facility as operating income plus interest income and before depreciation, amortization and certain other noncash items.
	The Credit Facility is used for general corporate purposes. At December 31, 2014, the Company had no borrowings outstanding under the Credit Facility and the remaining availability under the Credit Facility, net of outstanding letters of credit, was $2.49 billion.

Financial_Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments	10) FINANCIAL INSTRUMENTS
	The Company’s carrying value of financial instruments approximates fair value, except for differences with respect to notes and debentures.  At December 31, 2014 and 2013, the carrying value of the Company's senior debt was $6.43 billion and $5.86 billion, respectively, and the fair value, which is estimated based on quoted market prices for similar liabilities (Level 2) and includes accrued interest, was $7.15 billion and $6.69 billion, respectively.
	The Company uses derivative financial instruments primarily to modify its exposure to market risks from fluctuations in foreign currency exchange rates and interest rates.  The Company does not use derivative instruments unless there is an underlying exposure and, therefore, the Company does not hold or enter into derivative financial instruments for speculative trading purposes.
	All of the Company’s long-term debt has been issued under fixed interest rate agreements. During 2014, in connection with the issuance of its $600 million of 2.30% senior notes due 2019, the Company entered into $600 million notional amount of fixed-to-floating rate swap agreements to hedge this debt. The fair value of interest rate swaps is included within the carrying value of the debt attributable to the risk being hedged, and in other assets or other liabilities on the Consolidated Balance Sheet. Gains or losses on interest rate swaps are recognized within interest expense.
	Foreign exchange forward contracts have principally been used to hedge projected cash flows, generally within the next twelve months, in currencies such as the British Pound, the Euro, the Canadian Dollar and the Australian Dollar.  The Company designates forward contracts used to hedge projected future television production costs as cash flow hedges.  Gains or losses on the effective portion of designated cash flow hedges are initially recorded in other comprehensive income and reclassified to the statement of operations when the hedged item is recognized.  Additionally, the Company enters into non-designated forward contracts to hedge non-U.S. dollar denominated cash flows.  The change in fair value of the non-designated contracts is included in “Other items, net” in the Consolidated Statements of Operations.
	At December 31, 2014 and 2013, the notional amount of all foreign currency contracts was $152 million and $136 million, respectively, which represents hedges of expected foreign currency cash flows.
	The fair value of the Company’s derivative instruments and the related activity was not material to the Consolidated Balance Sheets and Consolidated Statements of Operations for any of the periods presented.
	The Company continually monitors its positions with, and credit quality of, the financial institutions that are counterparties to its financial instruments. The Company is exposed to credit loss in the event of nonperformance by the counterparties to the agreements. However, the Company does not anticipate nonperformance by the counterparties.
	The Company’s receivables do not represent significant concentrations of credit risk at December 31, 2014 and 2013, due to the wide variety of customers, markets and geographic areas to which the Company’s products and services are sold.

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements	11) FAIR VALUE MEASUREMENTS
	The following tables set forth the Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2014 and 2013. These assets and liabilities have been categorized according to the three-level fair value hierarchy established by the FASB, which prioritizes the inputs used in measuring fair value. Level 1 is based on publicly quoted prices for the asset or liability in active markets. Level 2 is based on inputs that are observable other than quoted market prices in active markets, such as quoted prices for the asset or liability in inactive markets or quoted prices for similar assets or liabilities. Level 3 is based on unobservable inputs reflecting the Company’s own assumptions about the assumptions that market participants would use in pricing the asset or liability.
	At December 31, 2014	Level 1		Level 2		Level 3		Total
	Assets:
	Investments	$	80	$	—	$	—	$	80
	Foreign currency hedges	—		6		—		6
	Total Assets	$	80	$	6	$	—	$	86
	Liabilities:							$	—
	Deferred compensation	$	—	$	307	$	—	$	307
	Foreign currency hedges	—		2		—		2
	Total Liabilities	$	—	$	309	$	—	$	309
	At December 31, 2013	Level 1		Level 2		Level 3		Total
	Assets:
	Investments	$	83	$	—	$	—	$	83
	Foreign currency hedges	—		3		—		3
	Total Assets	$	83	$	3	$	—	$	86
	Liabilities:							$	—
	Deferred compensation	$	—	$	268	$	—	$	268
	Foreign currency hedges	—		4		—		4
	Total Liabilities	$	—	$	272	$	—	$	272
	The fair value of investments is determined based on publicly quoted market prices in active markets. The fair value of foreign currency hedges is determined based on the present value of future cash flows using observable inputs including foreign currency exchange rates. The fair value of deferred compensation is determined based on the fair value of the investments elected by employees.
	In connection with the disposal of Outdoor Europe in 2013, the Company recorded a pretax charge of $40 million in net earnings (loss) from discontinued operations, for the estimated fair value of guarantees, which historically have been intercompany but upon the closing of the transaction became third-party guarantees. The fair value of guarantee liabilities reflected the premium that would be required to issue such guarantee in a standalone arm’s length transaction and was calculated based on an assessment of the probability of the primary obligor's default under the obligation, discounted to its present value (Level 3). At December 31, 2014, the guarantee liabilities were reduced to $28 million upon the expiration or settlement of obligations under the guarantees.
	During 2014, in connection with a radio station swap, the Company recorded a pretax noncash impairment charge of $52 million to reduce the carrying value of the allocated goodwill to its fair value using other nonobservable inputs (Level 3). The fair value of the transaction was determined based on a valuation of comparable assets in the same geographic markets.

Stockholders_Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Stockholders' Equity	12) STOCKHOLDERS’ EQUITY
	In general, CBS Corp. Class A Common Stock and CBS Corp. Class B Common Stock have the same economic rights; however, holders of CBS Corp. Class B Common Stock do not have any voting rights, except as required by law. Holders of CBS Corp. Class A Common Stock are entitled to one vote per share with respect to all matters on which the holders of CBS Corp. Common Stock are entitled to vote.
	Dividends—The Company declared a quarterly cash dividend on its Class A and Class B Common Stock during each of the four quarters of 2014, 2013, and 2012. For the years ended December 31, 2014, 2013 and 2012, the Company declared per share dividends of $.54, $.48, and $.44, respectively, resulting in total annual dividends of $296 million, $295 million and $287 million, respectively. Dividends have been recorded as a reduction to additional paid-in capital as the Company has an accumulated deficit balance.
	Purchase of Company Stock—During 2014, the Company repurchased 60.3 million shares of CBS Corp. Class B Common Stock under its share repurchase program for $3.61 billion, at an average cost of $59.88 per share. At December 31, 2014, $4.80 billion of authorization remained under the share repurchase program.
	Also during 2014, the Company completed the Split-Off through which it received 44.7 million shares of CBS Corp. Class B Common Stock in exchange for the 97.0 million shares of Outdoor Americas common stock that it owned (See Note 4).
	Conversion Rights—Holders of Class A Common Stock have the right to convert their shares to Class B Common Stock as long as there are at least 5,000 shares of Class A Common Stock outstanding. Conversions of CBS Corp. Class A Common Stock into Class B Common Stock were 1.3 million for 2014, 4.0 million for 2013 and 0.3 million for 2012.
	Equity Incentive Plans—The Company has equity incentive plans (the “Plans”) under which stock options, stock option equivalents, RSUs and PSUs were issued.
	The purpose of the Plans is to benefit and advance the interests of the Company by attracting, retaining and motivating participants and to compensate participants for their contributions to the financial success of the Company. The Plans provide for awards of stock options, stock appreciation rights, restricted and unrestricted shares, RSUs, dividend equivalents, performance awards and other equity-related awards. Upon exercise of stock options or vesting of RSUs and PSUs, the Company issues new shares from its existing authorization. At December 31, 2014, there were 58 million shares available for future grant under the Plans.
	RSUs and PSUs
	Compensation expense for RSUs is determined based upon the market price of the shares underlying the awards on the date of grant and expensed over the vesting period, which is generally a one- to four-year service period. Certain RSU awards are also subject to satisfying performance conditions. Compensation expense is recorded based on the probable outcome of the performance conditions. Forfeitures for RSUs are estimated on the date of grant based on historical forfeiture rates. On an annual basis, the Company adjusts the compensation expense based on actual forfeitures and revises the forfeiture rate as necessary.
	During 2012, the Company also granted awards of PSUs which vest based on the achievement of market performance targets.  The number of shares that will be issued upon vesting of PSUs can range from 0% to 300% of the target award, based on the ranking of the total shareholder return (“TSR”) for CBS Corp. Class B Common Stock within the S&P 500 Index over a designated three-year measurement period, or in certain circumstances, based on the achievement of established operating performance goals. The fair value of the PSUs is determined using a Monte Carlo Simulation model. This model generates simulated TSR of CBS Corp. Class B Common Stock versus each of the companies in the S&P 500 Index through the end of the relevant measurement period. Compensation expense for PSUs is expensed over the vesting period, which is a three-year service period.
	The total fair value of RSUs and PSUs that vested during 2014, 2013, and 2012 was $319 million, $324 million and $251 million, respectively. Total unrecognized compensation cost related to non-vested RSUs at December 31, 2014 was $182 million which is expected to be recognized over a weighted average period of 2.3 years.
	The following table summarizes the Company’s RSU and PSU activity.
							Weighted Average
		RSUs and PSUs					Grant Date Fair Value
	Non-vested at December 31, 2013		9,519,224					$	31.2
	Granted		2,789,721					$	62.7
	Vested		(4,929,780	)				$	28.56
	Forfeited		(422,899	)				$	43.23
	Converted to Outdoor Americas RSUs		(256,172	)				$	37.77
	Non-vested at December 31, 2014		6,700,094					$	45.26
	Stock Options and Equivalents
	Compensation expense for stock options is determined based on the grant date fair value of the award calculated using the Black-Scholes options-pricing model. Stock options generally vest over a three- to four-year service period and expire eight years from the date of grant. Forfeitures are estimated on the date of grant based on historical forfeiture rates. On an annual basis, the Company adjusts the compensation expense based on actual forfeitures and revises the forfeiture rate as necessary. Stock option equivalents are settled in cash upon exercise and therefore, the Company remeasures the fair value of these awards at each reporting date. The Company had 0.2 million and 1.8 million stock option equivalents outstanding at December 31, 2014 and 2013, respectively.
	The weighted average fair value of stock options as of the grant date was $18.23, $12.11 and $9.05 in 2014, 2013, and 2012, respectively. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
		2014			2013			2012
	Expected dividend yield	1.25	%		1.49	%		1.92	%
	Expected stock price volatility	33.06	%		34.86	%		39.09	%
	Risk-free interest rate	1.6	%		0.97	%		0.94	%
	Expected term of options (years)	5			5			5.02
	The expected stock price volatility is determined using a weighted average of historical volatility for CBS Corp. Class B Common Stock and implied volatility of publicly traded options to purchase CBS Corp. Class B Common Stock. Given the existence of an actively traded market for CBS Corp. options, the Company was able to derive implied volatility using publicly traded options to purchase CBS Corp. Class B Common Stock that were trading near the grant date of the employee stock options at a similar exercise price and a remaining term of greater than one year.
	The risk-free interest rate is based on a U.S. Treasury rate in effect on the date of grant with a term equal to the expected life. The expected term is determined based on historical employee exercise and post-vesting termination behavior. The expected dividend yield represents the Company’s future expectation of the dividend yield based on current rates and historical patterns of dividend changes.
	Total unrecognized compensation cost related to non-vested stock option awards at December 31, 2014 was $54 million, which is expected to be recognized over a weighted average period of 2.4 years.
	The following table summarizes the Company’s stock option activity under the Plans.
							Weighted Average
		Stock Options					Exercise Price
	Outstanding at December 31, 2013		27,974,627					$	24.78
	Granted		2,039,818					$	65.91
	Exercised		(13,534,632	)				$	20.87
	Forfeited or expired		(625,755	)				$	32.3
	Converted to Outdoor Americas stock options		(219,741	)				$	33.27
	Outstanding at December 31, 2014		15,634,317					$	33.12
	Exercisable at December 31, 2014		8,615,711					$	25.15
	The following table summarizes other information relating to stock option exercises during the years ended December 31, 2014, 2013 and 2012.
	Year Ended December 31,	2014				2013				2012
	Cash received from stock option exercises	$	283			$	146			$	168
	Tax benefit of stock option exercises	$	200			$	88			$	67
	Intrinsic value of stock option exercises	$	517			$	229			$	174
	The following table summarizes information concerning outstanding and exercisable stock options to purchase CBS Corp. Class B Common Stock under the Plans at December 31, 2014.
		Outstanding										Exercisable
					Remaining		Weighted						Weighted
	Range of	Number of			Contractual		Average					Number	Average
	Exercise Price	Options			Life (Years)		Exercise Price					of Options	Exercise Price
	$5 to 9.99	757,967			2.23			$	5.26			757,967		$	5.26
	$10 to 19.99	604,593			3.36			$	14.09			604,593		$	14.09
	$20 to 29.99	8,417,067			3.7			$	25.81			5,690,194		$	25.68
	$30 to 39.99	1,426,662			5.4			$	34.05			1,083,333		$	33.92
	$40 to 49.99	2,400,080			6.16			$	44.14			477,893		$	44.38
	$50 to 59.99	9,521			6.82			$	59.94			1,731		$	59.94
	$60 to 69.99	2,018,427			7.13			$	65.91			—		$	—
		15,634,317										8,615,711
	At December 31, 2014 stock options outstanding have a weighted average remaining contractual life of 4.59 years and the total intrinsic value for “in-the-money” options, based on the Company’s closing stock price of $55.34, was $369 million. At December 31, 2014 stock options exercisable have a weighted average remaining contractual life of 3.60 years and the total intrinsic value for “in-the-money” exercisable options was $260 million.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	13) INCOME TAXES
	The U.S. and foreign components of earnings from continuing operations before income taxes and equity in loss of investee companies were as follows:
	Year Ended December 31,	2014			2013			2012
	United States	$	1,790		$	2,283		$	2,030
	Foreign	374			382			327
	Total	$	2,164		$	2,665		$	2,357
	The components of the provision for income taxes were as follows:
	Year Ended December 31,	2014			2013			2012
	Current:
	Federal	$	(14	)	$	310		$	236
	State and local	22			74			61
	Foreign	62			61			62
		70			445			359
	Deferred	692			433			453
	Provision for income taxes	$	762		$	878		$	812
	In addition, included in discontinued operations was an income tax provision of $26 million, $6 million, and $62 million in 2014, 2013, and 2012, respectively.
	The equity in loss of investee companies is shown net of tax on the Company’s Consolidated Statements of Operations. The tax benefits relating to losses from equity investments in 2014, 2013, and 2012 were $30 million, $31 million, and $23 million, respectively, which represented an effective tax rate of 38.7% for 2014 and 38.8% for each of 2013 and 2012.
	In 2014 and 2013, the Company realized tax benefits from the exercise of stock options and vesting of RSUs and PSUs of $322 million and $210 million, respectively.
	The difference between income taxes expected at the U.S. federal statutory income tax rate of 35% and the provision for income taxes is summarized as follows:
	Year Ended December 31,	2014			2013			2012
	Taxes on income at U.S. federal statutory rate	$	758		$	933		$	825
	State and local taxes, net of federal tax benefit	93			101			84
	Effect of foreign operations	(90		)	(92		)	(67		)
	Audit settlements, net	(7		)	(17		)	(3		)
	Other, net (a)	8			(47		)	(27		)
	Provision for income taxes	$	762		$	878		$	812
	(a) For 2013 and 2012, amounts primarily reflect the Company’s domestic production deduction.
	The following table summarizes the components of deferred income tax assets and liabilities.
	At December 31,	2014			2013
	Deferred income tax assets:
	Reserves and other accrued liabilities	$	743		$	798
	Pension, postretirement and other employee benefits	794			697
	Tax credit and loss carryforwards	628			664
	Other	113			151
	Total deferred income tax assets	2,278			2,310
	Valuation allowance	(575		)	(634		)
	Deferred income tax assets, net	1,703			1,676
	Deferred income tax liabilities:
	Intangible assets	(2,432		)	(2,305		)
	Unbilled licensing receivables	(532		)	(345		)
	Property, equipment and other assets	(151		)	(176		)
	Total deferred income tax liabilities	(3,115		)	(2,826		)
	Deferred income tax liabilities, net	$	(1,412	)	$	(1,150	)
	In addition to the deferred income taxes reflected in the table above, included in the assets and liabilities of discontinued operations on the Consolidated Balance Sheets is a net deferred income tax asset of $38 million at December 31, 2014 and a net deferred income tax liability of $182 million at December 31, 2013.
	At December 31, 2014, the Company had net operating loss carryforwards for federal, state and local, and foreign jurisdictions of approximately $925 million, the majority of which expire in various years from 2015 through 2034.
	The 2014 and 2013 deferred income tax assets were reduced by a valuation allowance of $575 million and $634 million, respectively, principally relating to income tax benefits from capital losses and net operating losses in foreign jurisdictions which are not expected to be realized.
	The Company’s share of the undistributed earnings of foreign subsidiaries not included in its consolidated federal income tax return that could be subject to additional income taxes if remitted was approximately $3.99 billion at December 31, 2014 and $4.08 billion at December 31, 2013. No provision has been recorded for the U.S. or foreign taxes that could result from the remittance of such undistributed earnings since the Company intends to distribute only the portion of such earnings which would be offset by U.S. foreign tax credits or remitted in tax-free transactions, and intends to reinvest the remainder outside the U.S. indefinitely. The determination of the unrecognized U.S. federal deferred income tax liability for undistributed earnings is not practicable.
	The following table sets forth the change in the reserve for uncertain tax positions, excluding related accrued interest and penalties.
	At January 1, 2012	$	189
	Additions for current year tax positions	12
	Additions for prior year tax positions	10
	Reductions for prior year tax positions	(32		)
	Cash settlements	(5		)
	Statute of limitations lapses	(2		)
	At December 31, 2012	172
	Additions for current year tax positions	11
	Additions for prior year tax positions	14
	Reductions for prior year tax positions	(40		)
	Cash settlements	(17		)
	Statute of limitations lapses	(1		)
	At December 31, 2013	139
	Additions for current year tax positions	14
	Additions for prior year tax positions	31
	Reductions for prior year tax positions	(26		)
Cash settlements	(16		)
Statute of limitations lapses	(2		)
At December 31, 2014	$	140
At December 31, 2014 and 2013, $48 million and $53 million, respectively, of the reserve for uncertain tax positions were included in “Liabilities of discontinued operations” on the Consolidated Balance Sheets.
The reserve for uncertain tax positions of $140 million at December 31, 2014 includes $111 million which would affect the Company’s effective income tax rate, including discontinued operations, if and when recognized in future years.
The Company recognizes interest and penalty charges related to the reserve for uncertain tax positions as income tax expense. For the years ended December 31, 2014, 2013 and 2012, the Company recognized interest and penalties of $14 million, $12 million and $13 million, respectively, in the Consolidated Statements of Operations. As of December 31, 2014 and 2013, the Company has recorded liabilities for accrued interest and penalties of $50 million and $56 million, respectively, on the Consolidated Balance Sheets.
The Company is currently under examination by the IRS for the years 2011 and 2012 and expects to settle the audit in the first quarter of 2015. In addition, during the next six months, the Company expects a decrease to its reserve for uncertain tax positions related to an audit in a foreign jurisdiction of a previously disposed business that is accounted for as a discontinued operation. Various tax years are currently under examination by state and local and other foreign tax authorities. With respect to open tax years in all jurisdictions, the Company currently believes that it is reasonably possible that the reserve for uncertain tax positions will decrease within the next twelve months; however, as it is difficult to predict the final outcome of any particular tax matter, an estimate of any related impact to the reserve for uncertain tax positions cannot currently be determined.

Pension_and_Other_Postretireme

Pension and Other Postretirement Benefits	12 Months Ended
	Dec. 31, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Pension and Other Postretirement Benefits	14) PENSION AND OTHER POSTRETIREMENT BENEFITS
	The Company and certain of its subsidiaries sponsor qualified and non-qualified defined benefit pension plans, principally non-contributory, covering eligible employees. The majority of participants in these plans are retired employees or former employees of previously divested businesses. Most of the Company’s pension plans are closed to new entrants. The benefits for some plans are based primarily on an employee’s years of service and average pay near retirement. Benefits under other plans are based primarily on an employee’s pay for each year that the employee participated in the plan. Participating employees are vested in the plans after five years of service. The Company funds its pension plans in accordance with the Employee Retirement Income Security Act of 1974 (“ERISA”), the Pension Protection Act of 2006, the Internal Revenue Code of 1986 and the applicable rules and regulations. Plan assets consist principally of corporate bonds, equity securities and U.S. government securities. The Company’s common stock represents approximately 1.9% and 2.2% of the plan assets’ fair values at December 31, 2014 and 2013, respectively.
	In addition, the Company sponsors health and welfare plans that provide postretirement health care and life insurance benefits to eligible retired employees and their covered dependents. Eligibility is based in part on certain age and service requirements at the time of their retirement. Most of the plans are contributory and contain cost-sharing features such as deductibles and coinsurance which are adjusted annually. Claims are paid primarily with the Company’s funds.
	The Company uses a December 31 measurement date for all pension and other postretirement benefit plans.
	The following table sets forth the change in benefit obligation for the Company’s pension and postretirement benefit plans.
		Pension Benefits								Postretirement Benefits
		2014				2013				2014				2013
	Change in benefit obligation:
	Benefit obligation, beginning of year	$	5,022			$	5,511			$	589			$	676
	Service cost	31				38				—				—
	Interest cost	237				211				25				26
	Actuarial loss (gain)	444				(311		)		5				(51		)
	Benefits paid	(396		)		(415		)		(74		)		(79		)
	Participants’ contributions	—				—				11				10
	Retiree Medicare drug subsidy	—				—				6				7
	Settlements	(1		)		—				—				—
	Cumulative translation adjustments	(14		)		(12		)		—				—
	Benefit obligation, end of year	$	5,323			$	5,022			$	562			$	589
	The following table sets forth the change in plan assets for the Company’s pension and postretirement benefit plans.
		Pension Benefits								Postretirement Benefits
		2014				2013				2014				2013
	Change in plan assets:
	Fair value of plan assets, beginning of year	$	4,184			$	4,234			$	5			$	5
	Actual return on plan assets	402				178				—				—
	Employer contributions	50				199				57				62
	Benefits paid	(396		)		(415		)		(74		)		(79		)
	Participants’ contributions	—				—				11				10
	Retiree Medicare drug subsidy	—				—				6				7
	Settlements	(1		)		—				—				—
	Cumulative translation adjustments	(15		)		(12		)		—				—
	Fair value of plan assets, end of year	$	4,224			$	4,184			$	5			$	5
	The funded status of pension and postretirement benefit obligations and the related amounts recognized on the Company’s Consolidated Balance Sheets were as follows:
		Pension Benefits								Postretirement Benefits
	At December 31,	2014				2013				2014				2013
	Funded status at end of year	$	(1,099	)		$	(838	)		$	(557	)		$	(584	)
	Amounts recognized on the Consolidated Balance Sheets:
	Other assets	$	15			$	17			$	—			$	—
	Current liabilities	(50		)		(50		)		(57		)		(62		)
	Noncurrent liabilities	(1,064		)		(805		)		(500		)		(522		)
	Net amounts recognized	$	(1,099	)		$	(838	)		$	(557	)		$	(584	)
	The Company’s qualified pension plans were underfunded by $425 million and $203 million at December 31, 2014 and 2013, respectively.
	The following amounts were recognized in accumulated other comprehensive income (loss) on the Consolidated Balance Sheets.
		Pension Benefits								Postretirement Benefits
	At December 31,	2014				2013				2014				2013
	Net actuarial (loss) gain	$	(1,774	)		$	(1,533	)		$	222			$	248
	Net prior service (cost) credit	(10		)		(11		)		—				1
	Share of equity investee	(1		)		—				—				—
		(1,785		)		(1,544		)		222				249
	Deferred income taxes	706				612				(35		)		(46		)
	Net amount recognized in accumulated other	$	(1,079	)		$	(932	)		$	187			$	203
	comprehensive income (loss)
	The accumulated benefit obligation for all defined benefit pension plans was $5.23 billion and $4.95 billion at December 31, 2014 and 2013, respectively.
	Information for the pension plans with an accumulated benefit obligation in excess of plan assets is set forth below.
	At December 31,	2014				2013
	Projected benefit obligation	$	5,200			$	4,890
	Accumulated benefit obligation	$	5,111			$	4,814
	Fair value of plan assets	$	4,085			$	4,036
	The following tables present the components of net periodic benefit cost and amounts recognized in other comprehensive income (loss).
		Pension Benefits												Postretirement Benefits
	Year Ended December 31,	2014				2013				2012				2014				2013			2012
	Components of net periodic cost:
	Service cost	$	31			$	38			$	34			$	—			$	—		$	—
	Interest cost	237				211				240				25				26			33
	Expected return on plan assets	(262		)		(271		)		(247		)		—				—			—
Amortization of actuarial losses (gains)	63				85				70				(21		)		(16		)	(16		)
Amortization of prior service cost (credit)	1				1				1				(1		)		(1		)	(1		)
Net periodic cost	$	70			$	64			$	98			$	3			$	9		$	16
	Pension				Postretirement
Year Ended December 31, 2014	Benefits				Benefits
Other comprehensive income (loss):
Actuarial loss	$	(304	)		$	(5	)
Amortization of actuarial losses (gains) (a)	63				(21		)
Amortization of prior service cost (credit) (a)	1				(1		)
Share of equity investee	(1		)		—
	(241		)		(27		)
Deferred income taxes	94				11
Recognized in other comprehensive income, net of tax	$	(147	)		$	(16	)
(a)  Reflects amounts reclassified from accumulated other comprehensive income (loss) to net earnings.
Estimated net actuarial losses and prior service costs related to the defined benefit pension plans of approximately $78 million and $1 million, respectively, will be amortized from accumulated other comprehensive income (loss) into net periodic benefit costs in 2015.
Estimated net actuarial gains related to the other postretirement benefit plans of approximately $19 million will be amortized from accumulated other comprehensive income (loss) into net periodic benefit costs in 2015.
	Pension						Postretirement
	Benefits						Benefits
	2014			2013			2014			2013
Weighted average assumptions used to determine benefit obligations at December 31:
Discount rate	4.1	%		4.9	%		3.8	%		4.5	%
Rate of compensation increase	3	%		3	%		N/A			N/A
Weighted average assumptions used to determine net periodic costs for the year ended December 31:
Discount rate	4.9	%		4	%		4.5	%		4	%
Expected long-term return on plan assets	6.5	%		6.5	%		2	%		2	%
Rate of compensation increase	3	%		3	%		N/A			N/A
N/A - not applicable
The discount rates are determined based on the yield on portfolios of high quality bonds, constructed to provide cash flows necessary to meet the plans’ expected future benefit payments, as determined for the benefit obligations. The expected return on plan assets assumption is derived using the current and expected asset allocation of the pension plan assets and considering historical as well as expected returns on various classes of plan assets.
The following additional assumptions were used in accounting for postretirement benefits.
	2014			2013
Projected health care cost trend rate for participants of age 65 and below	7	%		7.5	%
Projected health care cost trend rate for participants above age 65	7	%		7.5	%
Ultimate trend rate	5	%		5	%
Year ultimate trend rate is achieved for participants of age 65 and below	2019			2019
Year ultimate trend rate is achieved for participants above 65	2019			2019
A one percentage point change in assumed health care cost trend rates would have the following effects:
	One Percentage				One Percentage
	Point Increase				Point Decrease
Effect on total service and interest cost components	$	—			$	—
Effect on the accumulated postretirement benefit obligation	$	9			$	(9	)
Plan Assets
The asset allocations for the Company’s U.S. qualified defined benefit pension plan trust and international pension plan trusts are based upon an analysis of the timing and amount of projected benefit payments, projected company contributions, the expected returns and risk of the asset classes and the correlation of those returns. The target asset allocation for the Company’s U.S. pension plan trust, which accounted for 95% of total plan assets at December 31, 2014, is to invest between 70% - 80% in long duration fixed income instruments, 16% - 28% in equity securities and the remainder in cash and other investments. At December 31, 2014, this trust was invested approximately 76% in long duration fixed income portfolios, 22% in equity instruments, and the remainder in cash, cash equivalents and other investments. Other trusts, which fund the Company’s international pension plans, accounted for 5% of total plan assets at December 31, 2014 and are invested approximately 74% in fixed income instruments, 20% in equity instruments, and the remainder in cash, cash equivalents and other investments. Long duration fixed income investments primarily consist of a diversified portfolio of investment grade fixed income instruments with a duration that approximates the duration of the liabilities covered by the trust. All equity portfolios are diversified between U.S. and non-U.S. equities and include large and small capitalization equities. The asset allocations are reviewed regularly.
The following tables set forth the Company’s pension plan assets measured at fair value on a recurring basis at December 31, 2014 and 2013. These assets have been categorized according to the three-level fair value hierarchy established by the FASB which prioritizes the inputs used in measuring fair value. Level 1 is based on quoted prices for the asset in active markets. Level 2 is based on inputs that are observable other than quoted market prices in active markets, such as quoted prices for the asset in inactive markets or quoted prices for similar assets. Level 3 is based on unobservable inputs that market participants would use in pricing the asset.
At December 31, 2014	Level 1				Level 2				Level 3				Total
Cash and cash equivalents (a)	$	5			$	43			$	—			$	48
Fixed income securities:
U.S. treasury securities	139				—				—				139
Government-related securities	49				301				—				350
Corporate bonds (b)	—				2,560				—				2,560
Mortgage-backed and asset-backed securities	—				116				3				119
Equity securities: (c)
U.S. large capitalization	258				349				—				607
U.S. small capitalization	74				2				—				76
International equity (d)	—				242				—				242
Limited partnerships	—				—				56				56
Other	—				27				—				27
Total Assets	$	525			$	3,640			$	59			$	4,224
At December 31, 2013	Level 1				Level 2				Level 3				Total
Cash and cash equivalents (a)	$	8			$	55			$	—			$	63
Fixed income securities:
U.S. treasury securities	133				—				—				133
Government-related securities	44				234				—				278
Corporate bonds (b)	—				2,373				—				2,373
Mortgage-backed and asset-backed securities	—				128				4				132
Equity securities: (c)
U.S. large capitalization	345				355				—				700
U.S. small capitalization	98				3				—				101
International equity (d)	—				291				—				291
Limited partnerships	—				—				55				55
Other	—				58				—				58
Total Assets	$	628			$	3,497			$	59			$	4,184
(a) Assets categorized as Level 2 reflect investments in money market funds.
(b)  Securities of diverse industries, substantially all investment grade.
(c)  Assets categorized as Level 2 reflect investments in common collective funds.
(d) Includes investments in emerging market funds of $50 million and $59 million at December 31, 2014 and 2013, respectively.
Money market investments are carried at amortized cost which approximates fair value due to the short-term maturity of these investments. Investments in equity securities are reported at fair value based on quoted market prices on national security exchanges. The fair value of investments in common collective funds are determined using the Net Asset Value (“NAV”) provided by the administrator of the fund. The NAV is determined by each fund’s trustee based upon the fair value of the underlying assets owned by the fund, less liabilities, divided by the number of outstanding units. The fair value of U.S. treasury securities is determined based on quoted market prices in active markets. The fair value of government related securities and corporate bonds is determined based on quoted market prices on national security exchanges, when available, or using valuation models which incorporate certain other observable inputs including recent trading activity for comparable securities and broker quoted prices. The fair value of mortgage-backed and asset-backed securities is based upon valuation models which incorporate available dealer quotes and market information. Limited partnerships are valued using statements issued by the partnership which determine the value based on the fair value of the underlying investments.
The table below sets forth a summary of changes in the fair value of investments reflected as Level 3 at December 31, 2014.
	Limited				Mortgage-backed				Total
	Partnerships				Securities
At January 1, 2013	$	52			$	4			$	56
Actual return related to investments held at end of year	4				—				4
Distributions	(1		)		—				(1		)
At December 31, 2013	55				4				59
Actual return related to investments held at end of year	1				—				1
Distributions	—				(1		)		(1		)
At December 31, 2014	$	56			$	3			$	59
The Company’s other postretirement benefits plan assets of $5 million at both December 31, 2014 and 2013 were invested in U.S. fixed income index funds, which are categorized as Level 1 assets.
Future Benefit Payments
Estimated future benefit payments are as follows:
	2015				2016				2017				2018				2019			2020-2024
Pension	$	398			$	388			$	381			$	372			$	364		$	1,691
Postretirement	$	67			$	65			$	62			$	59			$	57		$	236
Retiree Medicare drug subsidy	$	9			$	9			$	8			$	8			$	8		$	36
In 2015 the Company expects to make contributions of approximately $50 million to its non-qualified pension plans to satisfy the benefit payments due under these plans. Also in 2015, the Company expects to contribute approximately $58 million to its other postretirement benefit plans to satisfy the Company’s portion of benefit payments due under these plans.
Multiemployer Pension and Postretirement Benefit Plans
The Company contributes to a number of multiemployer defined benefit pension plans under the terms of collective-bargaining agreements that cover its union-represented employees including talent, writers, directors, producers and other employees, primarily in the entertainment industry. The other employers participating in these multiemployer plans are primarily in the entertainment and other related industries. The risks of participating in multiemployer plans are different from single-employer plans as assets contributed to the multiemployer plan by one employer may be used to provide benefits to employees of other participating employers and if a participating employer stops contributing to the plan, the unfunded obligations of the plan may be borne by the remaining participating employers. In addition, if the Company chooses to stop participating in some of its multiemployer plans it may be required to pay those plans a withdrawal liability based on the underfunded status of the plan.
The financial health of a multiemployer plan is indicated by the zone status, as defined by the Pension Protection Act of 2006, which represents the funded status of the plan as certified by the plan’s actuary. Plans in the red zone are less than 65% funded, the yellow zone are between 65% and 80% funded, and green zone are at least 80% funded.
The table below presents information concerning the Company’s participation in multiemployer defined benefit pension plans.
																			Expiration
		Employer		Pension															Date of
		Identification		Protection Act															Collective-
		Number/Pension		Zone Status (a)			Company Contributions												Bargaining
Pension Plan		Plan Number		2014	2013		2014				2013				2012				Agreement
AFTRA Retirement Plan (b)		13-6414972-001		Green	Green		$	7			$	7			$	7			(c)
Directors Guild of America - Producer		95-2892780-001		Green	Green		5				5				4				6/30/17
Producer-Writers Guild of America		95-2216351-001		Green	Green		10				8				8				5/1/17
Screen Actors Guild - Producers		95-2110997-001		Green	Green		7				7				6				6/30/17
Motion Picture Industry		95-1810805-001		Green	Green		8				7				7				(d)
Other Plans							10				8				6
		Total contributions					$	47			$	42			$	38
(a) The Zone status for each individual plan listed was certified by each plan’s actuary as of the beginning of the plan years for 2014 and 2013. The plan year is the twelve months ending December 31 for each plan listed above except AFTRA Retirement Plan which has a plan year ending November 30.
(b) The Company was listed in AFTRA Retirement Plan’s Form 5500 as providing more than 5% of total contributions for the plan year ended November 30, 2013.
(c) The expiration dates range from June 30, 2017 through November 15, 2017.
(d) The expiration dates range from March 2, 2015 through March 2, 2016.
As a result of the above noted zone status there were no funding improvements or rehabilitation plans implemented, as defined by ERISA, nor any surcharges imposed for any of the individual plans listed.
The Company also contributes to multiemployer plans that provide postretirement healthcare, defined contribution and other benefits to certain employees under collective bargaining agreements. The contributions to these plans were $20 million, $17 million and $18 million for the years ended December 31, 2014, 2013 and 2012, respectively.
The Company recognizes the net periodic cost for multiemployer pension and postretirement benefit plans based on the required contributions to the plans.
Defined Contribution Plans
The Company sponsors defined contribution plans for the benefit of substantially all employees meeting eligibility requirements. Employer contributions to such plans were $49 million, $53 million and $49 million for the years ended December 31, 2014, 2013 and 2012, respectively.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	15) COMMITMENTS AND CONTINGENCIES
	The Company’s commitments not recorded on the balance sheet primarily consist of programming and talent commitments, operating lease arrangements and purchase obligations for goods and services resulting from the Company’s normal course of business.
	Programming and talent commitments of the Company, estimated to aggregate $13.72 billion as of December 31, 2014, primarily include $10.23 billion for sports programming rights, $2.70 billion relating to the production and licensing of television, radio, and film programming, and $797 million for talent contracts.  The Company also has committed purchase obligations which include agreements to purchase goods and services in the future that totaled $836 million as of December 31, 2014.
	Other long-term contractual obligations recorded on the Company’s Consolidated Balance Sheet include program liabilities, participations due to producers and residuals.
	At December 31, 2014, commitments for programming and talent and purchase obligations not recorded on the balance sheet and other long-term contractual obligations recorded on the balance sheet were payable as follows:
		Programming and Talent		Purchase Obligations		Other Long-Term Contractual Obligations
	2015	$	2,429	$	183		$	—
	2016	2,094		159			726
	2017	1,743		129			318
	2018	1,563		109			127
	2019	1,577		98			82
	2020 and thereafter	4,317		158			69
	Total	$	13,723	$	836		$	1,322
	The Company has long-term operating lease commitments for office space, equipment, transponders and studio facilities. The Company also enters into capital leases for satellite transponders.
	At December 31, 2014, future minimum rental payments under noncancellable operating leases with terms in excess of one year and payments under capital leases are as follows:
		Leases
		Capital		Operating
	2015	$	20	$	177
	2016	19		147
	2017	15		134
	2018	15		116
	2019	14		100
	2020 and thereafter	30		440
	Total minimum payments	$	113	$	1,114
	Less amounts representing interest	16
	Present value of minimum payments	$	97
	Future minimum operating lease payments have been reduced by future minimum sublease income of $64 million. Rent expense was $206 million in 2014, $211 million in 2013 and $204 million in 2012. Included in net earnings from discontinued operations was rent expense of $158 million in 2014, $292 million in 2013 and $283 million in 2012.
	Guarantees
	On September 30, 2013 the Company completed the sale of Outdoor Europe to an affiliate of Platinum Equity.  The Company continues to remain as guarantor of certain of Outdoor Europe’s obligations, including franchise payment obligations under certain transit franchise agreements. Generally, the Company would be required to perform under the guarantees in the event of non-performance by the buyer.  These agreements have varying terms, with the majority of the obligations guaranteed under these agreements expiring by September 2016.  At December 31, 2014, the total franchise payment obligations under these agreements are estimated to be approximately $187 million, which will decrease on a monthly basis thereafter.  The carrying value of the guarantee liability of approximately $28 million and $40 million at December 31, 2014 and 2013, respectively, is included in “Liabilities of discontinued operations” on the Consolidated Balance Sheets.
	The Company has indemnification obligations with respect to letters of credit and surety bonds primarily used as security against non-performance in the normal course of business. At December 31, 2014, the outstanding letters of credit and surety bonds approximated $242 million and were not recorded on the Consolidated Balance Sheet.
	In the course of its business, the Company both provides and receives indemnities which are intended to allocate certain risks associated with business transactions. Similarly, the Company may remain contingently liable for various obligations of a business that has been divested in the event that a third party does not live up to its obligations under an indemnification obligation. The Company records a liability for its indemnification obligations and other contingent liabilities when probable under generally accepted accounting principles.
	Legal Matters
	General. On an ongoing basis, the Company vigorously defends itself in numerous lawsuits and proceedings and responds to various investigations and inquiries from federal, state, local and international authorities (collectively, ‘‘litigation’’). Litigation may be brought against the Company without merit, is inherently uncertain and always difficult to predict. However, based on its understanding and evaluation of the relevant facts and circumstances, the Company believes that the below-described legal matters and other litigation to which it is a party are not likely, in the aggregate, to have a material adverse effect on its results of operations, financial position or cash flows. Under the Separation Agreement between the Company and Viacom Inc., the Company and Viacom Inc. have agreed to defend and indemnify the other in certain litigation in which the Company and/or Viacom Inc. is named.
	Claims Related to Former Businesses: Asbestos. The Company is a defendant in lawsuits claiming various personal injuries related to asbestos and other materials, which allegedly occurred principally as a result of exposure caused by various products manufactured by Westinghouse, a predecessor, generally prior to the early 1970s. Westinghouse was neither a producer nor a manufacturer of asbestos. The Company is typically named as one of a large number of defendants in both state and federal cases. In the majority of asbestos lawsuits, the plaintiffs have not identified which of the Company’s products is the basis of a claim. Claims against the Company in which a product has been identified principally relate to exposures allegedly caused by asbestos-containing insulating material in turbines sold for power-generation, industrial and marine use.
	Claims are frequently filed and/or settled in groups, which may make the amount and timing of settlements, and the number of pending claims, subject to significant fluctuation from period to period. The Company does not report as pending those claims on inactive, stayed, deferred or similar dockets which some jurisdictions have established for claimants who allege minimal or no impairment. As of December 31, 2014, the Company had pending approximately 41,100 asbestos claims, as compared with approximately 45,150 as of December 31, 2013 and 45,900 as of December 31, 2012. During 2014, the Company received approximately 3,880 new claims and closed or moved to an inactive docket approximately 7,930 claims. The Company reports claims as closed when it becomes aware that a dismissal order has been entered by a court or when the Company has reached agreement with the claimants on the material terms of a settlement. Settlement costs depend on the seriousness of the injuries that form the basis of the claim, the quality of evidence supporting the claims and other factors. The Company’s total costs for the years 2014 and 2013 for settlement and defense of asbestos claims after insurance recoveries and net of tax benefits were approximately $11 million and $29 million, respectively. The Company’s costs for settlement and defense of asbestos claims may vary year to year and insurance proceeds are not always recovered in the same period as the insured portion of the expenses.
	The Company believes that its reserves and insurance are adequate to cover its asbestos liabilities. This belief is based upon many factors and assumptions, including the number of outstanding claims, estimated average cost per claim, the breakdown of claims by disease type, historic claim filings, costs per claim of resolution and the filing of new claims. While the number of asbestos claims filed against the Company has trended down in the past five to ten years and has remained flat in recent years, it is difficult to predict future asbestos liabilities, as events and circumstances may occur including, among others, the number and types of claims and average cost to resolve such claims, which could affect the Company’s estimate of its asbestos liabilities.
	Other. The Company from time to time receives claims from federal and state environmental regulatory agencies and other entities asserting that it is or may be liable for environmental cleanup costs and related damages principally relating to historical and predecessor operations of the Company. In addition, the Company from time to time receives personal injury claims including toxic tort and product liability claims (other than asbestos) arising from historical operations of the Company and its predecessors.

Reportable_Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Reportable Segments	16) REPORTABLE SEGMENTS
	The following tables set forth the Company’s financial performance by reportable segment.  The Company’s operating segments, which are the same as its reportable segments, have been determined in accordance with the Company’s internal management structure, which is organized based upon products and services.
	Year Ended December 31,	2014			2013			2012
	Revenues:
	Entertainment	$	8,309		$	8,645		$	7,694
	Cable Networks	2,176			2,069			1,772
	Publishing	778			809			790
	Local Broadcasting	2,756			2,696			2,774
	Corporate/Eliminations	(213		)	(214		)	(210		)
	Total Revenues	$	13,806		$	14,005		$	12,820
	Revenues generated between segments primarily reflect advertising sales and television and feature film license fees. These transactions are recorded at market value as if the sales were to third parties and are eliminated in consolidation.
	Year Ended December 31,	2014			2013			2012
	Intercompany Revenues:
	Entertainment	$	206		$	208		$	203
	Cable Networks	1			—			—
	Local Broadcasting	18			17			19
	Total Intercompany Revenues	$	225		$	225		$	222
	The Company presents operating income (loss) before depreciation and amortization (“OIBDA”), restructuring charges and impairment charges (“Segment OIBDA”) as the primary measure of profit and loss for its operating segments in accordance with FASB guidance for segment reporting. Beginning in the first quarter of 2015, the Company will present Operating Income excluding restructuring charges and impairment charges as its segment profit measure, in order to align with the primary method the Company's management began using in 2015 to evaluate segment performance and to make decisions regarding the allocation of resources to its segments. The Company believes the presentation of its segment profit measure is relevant and useful for investors because it allows investors to view segment performance in a manner similar to the primary method used by the Company’s management and enhances their ability to understand the Company’s operating performance.
	Year Ended December 31,	2014			2013			2012
	Segment OIBDA:
	Entertainment	$	1,455		$	1,758		$	1,549
	Cable Networks	997			898			811
	Publishing	107			113			89
	Local Broadcasting	965			898			957
	Corporate	(269		)	(332		)	(292		)
	Total Segment OIBDA	3,255			3,335			3,114
	Restructuring charges	(26		)	(20		)	(19		)
	Impairment charges	(52		)	—			(11		)
	Depreciation and amortization	(281		)	(290		)	(306		)
	Operating income	2,896			3,025			2,778
	Interest expense	(363		)	(375		)	(401		)
	Interest income	13			8			5
	Net loss on early extinguishment of debt	(352		)	—			(32		)
	Other items, net	(30		)	7			7
	Earnings from continuing operations before income taxes and	2,164			2,665			2,357
	equity in loss of investee companies
	Provision for income taxes	(762		)	(878		)	(812		)
	Equity in loss of investee companies, net of tax	(48		)	(49		)	(37		)
	Net earnings from continuing operations	1,354			1,738			1,508
	Net earnings from discontinued operations, net of tax	1,605			141			66
	Net earnings	$	2,959		$	1,879		$	1,574
	Year Ended December 31,	2014			2013			2012
	Operating Income (Loss):
	Entertainment	$	1,308		$	1,593		$	1,381
	Cable Networks	974			877			785
	Publishing	100			106			80
	Local Broadcasting	812			807			848
	Corporate	(298		)	(358		)	(316		)
	Total Operating Income	$	2,896		$	3,025		$	2,778
	Year Ended December 31,	2014			2013			2012
	Depreciation and Amortization
	Entertainment	$	139		$	153		$	161
	Cable Networks	23			20			26
	Publishing	6			6			6
	Local Broadcasting	87			86			90
	Corporate	26			25			23
	Total Depreciation and Amortization	$	281		$	290		$	306
	Year Ended December 31,	2014			2013			2012
	Stock-based Compensation
	Entertainment	$	56		$	56		$	49
	Cable Networks	9			8			6
	Publishing	4			4			3
	Local Broadcasting	28			27			24
	Corporate	57			127			65
Total Stock-based Compensation	$	154		$	222		$	147
Year Ended December 31,	2014			2013			2012
Capital Expenditures
Entertainment	$	94		$	101		$	92
Cable Networks	16			16			18
Publishing	4			4			5
Local Broadcasting	65			64			64
Corporate	27			27			21
Total Capital Expenditures	$	206		$	212		$	200
At December 31,	2014			2013
Assets:
Entertainment	$	10,469		$	9,657
Cable Networks	2,113			1,968
Publishing	990			1,026
Local Broadcasting	9,585			9,600
Corporate	876			661
Discontinued operations	39			3,475
Total Assets	$	24,072		$	26,387
Year Ended December 31,	2014			2013			2012
Revenues by Type
Advertising	$	7,204		$	7,525		$	7,191
Content licensing and distribution	3,990			3,997			3,468
Affiliate and subscription fees	2,362			2,221			1,921
Other	250			262			240
Total Revenues	$	13,806		$	14,005		$	12,820
Year Ended December 31,	2014			2013			2012
Revenues: (a)
United States	$	12,013		$	12,178		$	11,275
International	1,793			1,827			1,545
Total Revenues	$	13,806		$	14,005		$	12,820
(a) Revenue classifications are based on customers’ locations.
At December 31,	2014			2013
Long-lived Assets: (a)
United States	$	17,881		$	20,169
International	328			533
Total Long-lived Assets	$	18,209		$	20,702
(a) Reflects total assets from both continuing and discontinued operations less current assets, investments and noncurrent deferred tax assets.
Transactions within the Company between the United States and international regions were not significant.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	17) SUPPLEMENTAL CASH FLOW INFORMATION
	Year Ended December 31,	2014		2013		2012
	Cash paid for interest (a)	$	707	$	360	$	440
	Cash paid for income taxes:
	Continuing operations	$	217	$	294	$	331
	Discontinued operations	42		92		75
	Total	$	259	$	386	$	406
	(a) Includes payments associated with the early extinguishment of debt of $360 million in 2014 and $60 million in 2012, mainly for early redemption premiums.
	Year Ended December 31,	2014		2013		2012
	Noncash investing and financing activities:
	Shares received in Split-Off (see Note 4)	$	2,721	$	—	$	—
	Equipment acquired under capitalized leases	$	1	$	58	$	13
	Radio station swap (See Note 3)	$	262	$	—	$	—
	Contingent consideration associated with acquisitions	$	—	$	—	$	4

Quarterly_Financial_Data_unaud

Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)	18) QUARTERLY FINANCIAL DATA (unaudited):
		First			Second			Third			Fourth
	2014 (a)	Quarter			Quarter			Quarter			Quarter			Total Year
	Revenues:
	Entertainment	$	2,303		$	1,835		$	1,911		$	2,260		$	8,309
	Cable Networks	537			516			624			499			2,176
	Publishing	153			211			199			215			778
	Local Broadcasting	626			665			680			785			2,756
	Corporate/Eliminations	(49		)	(39		)	(47		)	(78		)	(213		)
	Total Revenues	$	3,570		$	3,188		$	3,367		$	3,681		$	13,806
	Segment OIBDA:
	Entertainment	$	457		$	376		$	335		$	287		$	1,455
	Cable Networks	259			219			272			247			997
	Publishing	13			24			43			27			107
	Local Broadcasting	200			238			214			313			965
	Corporate	(67		)	(56		)	(50		)	(96		)	(269		)
	Total Segment OIBDA	862			801			814			778			3,255
	Restructuring charges	—			—			(26		)	—			(26		)
	Impairment charge	—			—			(52		)	—			(52		)
	Depreciation and amortization	(71		)	(71		)	(68		)	(71		)	(281		)
	Total Operating Income	$	791		$	730		$	668		$	707		$	2,896
	Operating Income (Loss):
	Entertainment	$	420		$	341		$	294		$	253		$	1,308
	Cable Networks	254			213			266			241			974
	Publishing	11			23			41			25			100
	Local Broadcasting	179			215			126			292			812
	Corporate	(73		)	(62		)	(59		)	(104		)	(298		)
	Total Operating Income	$	791		$	730		$	668		$	707		$	2,896
	Net earnings from continuing operations	$	462		$	418		$	72		$	402		$	1,354
	Net earnings	$	468		$	439		$	1,639		$	413		$	2,959
	Basic net earnings per common share:
	Net earnings from continuing operations	$	0.79		$	0.73		$	0.14		$	0.78		$	2.46
	Net earnings	$	0.8		$	0.77		$	3.08		$	0.8		$	5.38
	Diluted net earnings per common share:
	Net earnings from continuing operations	$	0.77		$	0.72		$	0.13		$	0.77		$	2.41
	Net earnings	$	0.78		$	0.76		$	3.03		$	0.79		$	5.27
	Weighted average number of common shares
	outstanding:
	Basic	585			570			532			515			550
	Diluted	600			581			541			523			561
	Dividends per common share	$	0.12		$	0.12		$	0.15		$	0.15		$	0.54
	(a)  On July 16, 2014, the Company completed the Split-Off of Outdoor Americas and as a result, Outdoor Americas has been presented as a discontinued operation in the consolidated financial statements for all periods presented.
		First			Second			Third			Fourth
	2013 (a) (b)	Quarter			Quarter			Quarter			Quarter			Total Year
	Revenues:
	Entertainment	$	2,539		$	2,008		$	1,884		$	2,214		$	8,645
	Cable Networks	478			518			596			477			2,069
	Publishing	171			189			224			225			809
	Local Broadcasting	638			698			641			719			2,696
	Corporate/Eliminations	(63		)	(44		)	(43		)	(64		)	(214		)
	Total Revenues	$	3,763		$	3,369		$	3,302		$	3,571		$	14,005
	Segment OIBDA:
	Entertainment	$	480		$	429		$	431		$	418		$	1,758
	Cable Networks	231			207			261			199			898
	Publishing	12			21			43			37			113
	Local Broadcasting	199			255			181			263			898
	Corporate	(77		)	(64		)	(82		)	(109		)	(332		)
	Total Segment OIBDA	845			848			834			808			3,335
	Restructuring charges	—			—			—			(20		)	(20		)
	Depreciation and amortization	(74		)	(73		)	(70		)	(73		)	(290		)
	Total Operating Income	$	771		$	775		$	764		$	715		$	3,025
	Operating Income (Loss):
	Entertainment	$	440		$	391		$	394		$	368		$	1,593
	Cable Networks	227			202			255			193			877
Publishing	10			20			41			35			106
Local Broadcasting	176			234			161			236			807
Corporate	(82		)	(72		)	(87		)	(117		)	(358		)
Total Operating Income	$	771		$	775		$	764		$	715		$	3,025
Net earnings from continuing operations	$	450		$	435		$	431		$	422		$	1,738
Net earnings	$	443		$	472		$	494		$	470		$	1,879
Basic net earnings per common share:
Net earnings from continuing operations	$	0.72		$	0.71		$	0.71		$	0.7		$	2.86
Net earnings	$	0.71		$	0.78		$	0.82		$	0.78		$	3.09
Diluted net earnings per common share:
Net earnings from continuing operations	$	0.71		$	0.7		$	0.7		$	0.69		$	2.79
Net earnings	$	0.69		$	0.76		$	0.8		$	0.76		$	3.01
Weighted average number of common shares
outstanding:
Basic	621			609			603			599			608
Diluted	638			624			618			615			624
Dividends per common share	$	0.12		$	0.12		$	0.12		$	0.12		$	0.48
(a)  On July 16, 2014, the Company completed the Split-Off of Outdoor Americas and as a result, Outdoor Americas has been presented as a discontinued operation in the consolidated financial statements for all periods presented.
(b) During 2013, the Company completed the sale of Outdoor Europe which has been presented as a discontinued operation in the consolidated financial statements for all periods presented.

Condensed_Consolidating_Financ

Condensed Consolidating Financial Statements	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Financial Statements	19) CONDENSED CONSOLIDATING FINANCIAL STATEMENTS
	CBS Operations Inc. is a wholly owned subsidiary of the Company.  CBS Operations Inc. has fully and unconditionally guaranteed CBS Corp.’s senior debt securities (See Note 9).  The following condensed consolidating financial statements present the results of operations, financial position and cash flows of CBS Corp., CBS Operations Inc., the direct and indirect Non-Guarantor Affiliates of CBS Corp. and CBS Operations Inc., and the eliminations necessary to arrive at the information for the Company on a consolidated basis.
		Statement of Operations
		For the Year Ended December 31, 2014
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Revenues	$	159		$	11		$	13,636		$	—		$	13,806
	Expenses:
	Operating	68			6			8,015			—			8,089
	Selling, general and administrative	61			255			2,146			—			2,462
	Restructuring charges	—			3			23			—			26
	Impairment charge	—			—			52			—			52
	Depreciation and amortization	6			16			259			—			281
	Total expenses	135			280			10,495			—			10,910
	Operating income (loss)	24			(269		)	3,141			—			2,896
	Interest (expense) income, net	(443		)	(383		)	476			—			(350		)
	Loss on early extinguishment of debt	(351		)	—			(1		)	—			(352		)
	Other items, net	(1		)	4			(33		)	—			(30		)
	Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies	(771		)	(648		)	3,583			—			2,164
	Benefit (provision) for income taxes	280			229			(1,271		)	—			(762		)
	Equity in earnings (loss) of investee companies,	3,444			1,270			(48		)	(4,714		)	(48		)
	net of tax
	Net earnings from continuing operations	2,953			851			2,264			(4,714		)	1,354
	Net earnings (loss) from discontinued operations, net of tax	6			(1		)	1,600			—			1,605
	Net earnings	$	2,959		$	850		$	3,864		$	(4,714	)	$	2,959
	Total comprehensive income	$	2,769		$	857		$	3,819		$	(4,676	)	$	2,769
		Statement of Operations
		For the Year Ended December 31, 2013
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Revenues	$	145		$	11		$	13,849		$	—		$	14,005
	Expenses:
	Operating	69			8			8,047			—			8,124
	Selling, general and administrative	65			323			2,158			—			2,546
	Restructuring charges	—			1			19			—			20
	Depreciation and amortization	6			14			270			—			290
	Total expenses	140			346			10,494			—			10,980
	Operating income (loss)	5			(335		)	3,355			—			3,025
	Interest (expense) income, net	(457		)	(369		)	459			—			(367		)
	Other items, net	—			4			3			—			7
	Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies	(452		)	(700		)	3,817			—			2,665
	Benefit (provision) for income taxes	152			235			(1,265		)	—			(878		)
	Equity in earnings (loss) of investee companies,	2,170			1,288			(49		)	(3,458		)	(49		)
	net of tax
	Net earnings from continuing operations	1,870			823			2,503			(3,458		)	1,738
	Net earnings (loss) from discontinued operations, net of tax	9			(5		)	137			—			141
	Net earnings	$	1,879		$	818		$	2,640		$	(3,458	)	$	1,879
	Total comprehensive income	$	1,903		$	815		$	2,463		$	(3,278	)	$	1,903
		Statement of Operations
		For the Year Ended December 31, 2012
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Revenues	$	157		$	15		$	12,648		$	—		$	12,820
	Expenses:
	Operating	74			8			7,182			—			7,264
	Selling, general and administrative	87			251			2,104			—			2,442
	Restructuring charges	—			2			17			—			19
	Impairment charge	—			—			11			—			11
	Depreciation and amortization	6			14			286			—			306
	Total expenses	167			275			9,600			—			10,042
	Operating income (loss)	(10		)	(260		)	3,048			—			2,778
Interest (expense) income, net	(480		)	(351		)	435			—			(396		)
Net loss on early extinguishment of debt	(32		)	—			—			—			(32		)
Other items, net	1			(5		)	11			—			7
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies	(521		)	(616		)	3,494			—			2,357
Benefit (provision) for income taxes	183			215			(1,210		)	—			(812		)
Equity in earnings (loss) of investee companies,	1,886			1,145			(37		)	(3,031		)	(37		)
net of tax
Net earnings from continuing operations	1,548			744			2,247			(3,031		)	1,508
Net earnings (loss) from discontinued operations, net of tax	26			(3		)	43			—			66
Net earnings	$	1,574		$	741		$	2,290		$	(3,031	)	$	1,574
Total comprehensive income	$	1,444		$	734		$	2,298		$	(3,032	)	$	1,444
	Balance Sheet
	At December 31, 2014
	CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
				Operations			Guarantor						Consolidated
				Inc.			Affiliates
Assets
Cash and cash equivalents	$	63		$	1		$	364		$	—		$	428
Receivables, net	29			2			3,428			—			3,459
Programming and other inventory	4			3			915			—			922
Prepaid expenses and other current assets	306			27			477			(30		)	780
Total current assets	402			33			5,184			(30		)	5,589
Property and equipment	41			162			2,961			—			3,164
Less accumulated depreciation and amortization	15			98			1,618			—			1,731
Net property and equipment	26			64			1,343			—			1,433
Programming and other inventory	7			8			1,802			—			1,817
Goodwill	98			62			6,538			—			6,698
Intangible assets	—			—			6,008			—			6,008
Investments in consolidated subsidiaries	41,144			11,685			—			(52,829		)	—
Other assets	219			17			2,252			—			2,488
Intercompany	—			2,726			21,772			(24,498		)	—
Assets of discontinued operations	—			—			39			—			39
Total Assets	$	41,896		$	14,595		$	44,938		$	(77,357	)	$	24,072
Liabilities and Stockholders' Equity
Accounts payable	$	3		$	24		$	275		$	—		$	302
Participants' share and royalties payable	—			—			999			—			999
Program rights	5			3			396			—			404
Commercial paper	616			—			—			—			616
Current portion of long-term debt	4			—			16			—			20
Accrued expenses and other current liabilities	388			270			1,038			(30		)	1,666
Current liabilities of discontinued operations	—			—			26			—			26
Total current liabilities	1,016			297			2,750			(30		)	4,033
Long-term debt	6,383			—			127			—			6,510
Other liabilities	3,029			249			3,163			—			6,441
Liabilities of discontinued operations	—			—			118			—			118
Intercompany	24,498			—			—			(24,498		)	—
Stockholders' Equity:
Preferred stock	—			—			126			(126		)	—
Common stock	1			123			590			(713		)	1
Additional paid-in capital	44,041			—			60,894			(60,894		)	44,041
Retained earnings (deficit)	(21,931		)	14,260			(18,111		)	3,851			(21,931		)
Accumulated other comprehensive income (loss)	(735		)	(3		)	81			(78		)	(735		)
	21,376			14,380			43,580			(57,960		)	21,376
Less treasury stock, at cost	14,406			331			4,800			(5,131		)	14,406
Total Stockholders' Equity	6,970			14,049			38,780			(52,829		)	6,970
Total Liabilities and Stockholders' Equity	$	41,896		$	14,595		$	44,938		$	(77,357	)	$	24,072
	Balance Sheet
	At December 31, 2013
	CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
				Operations			Guarantor						Consolidated
				Inc.			Affiliates
Assets
Cash and cash equivalents	$	80		$	1		$	287		$	—		$	368
Receivables, net	30			2			3,202			—			3,234
Programming and other inventory	4			2			766			—			772
Prepaid expenses and other current assets	179			18			474			(26		)	645
Current assets of discontinued operations	—			—			351			—			351
Total current assets	293			23			5,080			(26		)	5,370
Property and equipment	37			137			2,886			—			3,060
Less accumulated depreciation and amortization	9			83			1,507			—			1,599
Net property and equipment	28			54			1,379			—			1,461
Programming and other inventory	5			—			1,692			—			1,697
Goodwill	98			62			6,428			—			6,588
Intangible assets	—			—			5,870			—			5,870
Investments in consolidated subsidiaries	40,454			10,415			—			(50,869		)	—
Other assets	89			18			1,856			—			1,963
Assets held for sale	—			—			314			—			314
Intercompany	—			3,240			18,409			(21,649		)	—
Assets of discontinued operations	—			—			3,124			—			3,124
Total Assets	$	40,967		$	13,812		$	44,152		$	(72,544	)	$	26,387
Liabilities and Stockholders' Equity
Accounts payable	$	1		$	8		$	277		$	—		$	286
Participants' share and royalties payable	—			—			1,008			—			1,008
Program rights	5			2			391			—			398
Commercial paper	475			—			—			—			475
Current portion of long-term debt	5			—			15			—			20
Accrued expenses and other current liabilities	361			293			1,138			(26		)	1,766
Current liabilities of discontinued operations	—			—			254			—			254
Total current liabilities	847			303			3,083			(26		)	4,207
Long-term debt	5,791			—			149			—			5,940
Other liabilities	2,714			317			2,766			—			5,797
Liabilities of discontinued operations	—			—			477			—			477
Intercompany	21,649			—			—			(21,649		)	—
Stockholders' Equity:
Preferred stock	—			—			126			(126		)	—
Common stock	1			123			953			(1,076		)	1
Additional paid-in capital	43,474			—			61,678			(61,678		)	43,474
Retained earnings (deficit)	(24,890		)	13,410			(20,406		)	6,996			(24,890		)
Accumulated other comprehensive income (loss)	(545		)	(10		)	126			(116		)	(545		)
	18,040			13,523			42,477			(56,000		)	18,040
Less treasury stock, at cost	8,074			331			4,800			(5,131		)	8,074
Total Stockholders' Equity	9,966			13,192			37,677			(50,869		)	9,966
Total Liabilities and Stockholders' Equity	$	40,967		$	13,812		$	44,152		$	(72,544	)	$	26,387
	Statement of Cash Flows
	For the Year Ended December 31, 2014
	CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
				Operations			Guarantor						Consolidated
				Inc.			Affiliates
Net cash flow (used for) provided by operating activities	$	(1,107	)	$	(194	)	$	2,576		$	—		$	1,275
Investing Activities:
Acquisitions, net of cash acquired	—			—			(27		)	—			(27		)
Capital expenditures	—			(27		)	(179		)	—			(206		)
Investments in and advances to investee companies	—			—			(98		)	—			(98		)
Proceeds from sale of investments	—			—			12			—			12
Proceeds from dispositions	—			—			7			—			7
Other investing activities	(4		)	—			—			—			(4		)
Net cash flow used for investing activities from continuing operations	(4		)	(27		)	(285		)	—			(316		)
Net cash flow used for investing activities from discontinued operations	(29		)	—			(256		)	—			(285		)
Net cash flow used for investing activities	(33		)	(27		)	(541		)	—			(601		)
Financing Activities:
Proceeds from short-term debt borrowings, net	141			—			—			—			141
Proceeds from issuance of notes	1,728			—			—			—			1,728
Repayment of notes and debentures	(1,146		)	—			(6		)	—			(1,152		)
Payment of capital lease obligations	—			—			(17		)	—			(17		)
Dividends	(292		)	—			—			—			(292		)
Purchase of Company common stock	(3,595		)	—			—			—			(3,595		)
Payment of payroll taxes in lieu of issuing shares	(146		)	—			—			—			(146		)
for stock-based compensation
Proceeds from exercise of stock options	283			—			—			—			283
Excess tax benefit from stock-based compensation	243			—			—			—			243
Other financing activities	(3		)	—			—			—			(3		)
Increase (decrease) in intercompany payables	3,921			221			(4,142		)	—			—
Net cash flow provided by (used for) financing activities from continuing operations	1,134			221			(4,165		)	—			(2,810		)
Net cash flow (used for) provided by financing activities from discontinued operations	(11		)	—			2,178			—			2,167
Net cash flow provided by (used for) financing activities	1,123			221			(1,987		)	—			(643		)
Net (decrease) increase in cash and cash equivalents	(17		)	—			48			—			31
Cash and cash equivalents at beginning of period (includes $29 of discontinued operations cash)	80			1			316			—			397
Cash and cash equivalents at end of period	$	63		$	1		$	364		$	—		$	428
	Statement of Cash Flows
	For the Year Ended December 31, 2013
	CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
				Operations			Guarantor						Consolidated
				Inc.			Affiliates
Net cash flow (used for) provided by operating activities	$	(934	)	$	(187	)	$	2,994		$	—		$	1,873
Investing Activities:
Acquisitions, net of cash acquired	—			—			(20		)	—			(20		)
Capital expenditures	—			(27		)	(185		)	—			(212		)
Investments in and advances to investee companies	—			—			(176		)	—			(176		)
Proceeds from sale of investments	23			1			6			—			30
Proceeds from dispositions	—			—			164			—			164
Net cash flow provided by (used for) investing activities from continuing operations	23			(26		)	(211		)	—			(214		)
Net cash flow used for investing activities from discontinued operations	—			—			(58		)	—			(58		)
Net cash flow provided by (used for) investing activities	23			(26		)	(269		)	—			(272		)
Financing Activities:
Proceeds from short-term debt borrowings, net	475			—			—			—			475
Payment of capital lease obligations	—			—			(17		)	—			(17		)
Payment of contingent consideration	—			—			(30		)	—			(30		)
Dividends	(300		)	—			—			—			(300		)
Purchase of Company common stock	(2,185		)	—			—			—			(2,185		)
Payment of payroll taxes in lieu of issuing shares	(145		)	—			—			—			(145		)
for stock-based compensation
Proceeds from exercise of stock options	146			—			—			—			146
Excess tax benefit from stock-based compensation	148			—			—			—			148
Other financing activities	(4		)	—			—			—			(4		)
Increase (decrease) in intercompany payables	2,602			213			(2,815		)	—			—
Net cash flow provided by (used for) financing activities	737			213			(2,862		)	—			(1,912		)
Net decrease in cash and cash equivalents	(174		)	—			(137		)	—			(311		)
Cash and cash equivalents at beginning of period (includes $21 of discontinued operations cash)	254			1			453			—			708
Cash and cash equivalents at end of period	$	80		$	1		$	316		$	—		$	397
(includes $29 of discontinued operations cash)
	Statement of Cash Flows
	For the Year Ended December 31, 2012
	CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
				Operations			Guarantor						Consolidated
				Inc.			Affiliates
Net cash flow (used for) provided by operating activities	$	(827	)	$	(179	)	$	2,821		$	—		$	1,815
Investing Activities:
Acquisitions, net of cash acquired	—			—			(146		)	—			(146		)
Capital expenditures	—			(21		)	(179		)	—			(200		)
Investments in and advances to investee companies	—			—			(91		)	—			(91		)
Proceeds from sale of investments	9			2			2			—			13
Proceeds from dispositions	—			—			49			—			49
Net cash flow provided by (used for) investing activities from continuing operations	9			(19		)	(365		)	—			(375		)
Net cash flow used for investing activities from discontinued operations	—			—			(76		)	—			(76		)
Net cash flow provided by (used for) investing activities	9			(19		)	(441		)	—			(451		)
Financing Activities:
Proceeds from issuance of notes	1,566			—			—			—			1,566
Repayment of notes and debentures	(1,583		)	—			—			—			(1,583		)
Payment of capital lease obligations	—			—			(19		)	—			(19		)
Payment of contingent consideration	—			—			(33		)	—			(33		)
Dividends	(276		)	—			—			—			(276		)
Purchase of Company common stock	(1,137		)	—			—			—			(1,137		)
Payment of payroll taxes in lieu of issuing shares	(105		)	—			—			—			(105		)
for stock-based compensation
Proceeds from exercise of stock options	168			—			—			—			168
Excess tax benefit from stock-based compensation	103			—			—			—			103
Increase (decrease) in intercompany payables	2,202			198			(2,400		)	—			—
Net cash flow provided by (used for) financing activities	938			198			(2,452		)	—			(1,316		)
Net increase (decrease) in cash and cash equivalents	120			—			(72		)	—			48
Cash and cash equivalents at beginning of period (includes $38 of discontinued operations cash)	134			1			525			—			660
Cash and cash equivalents at end of period	$	254		$	1		$	453		$	—		$	708
(includes $21 of discontinued operations cash)

Schedule_II_Valuation_and_Qual

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2014
Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts
	Col. A	Col. B		Col. C							Col. D		Col. E
	Description	Balance at Beginning of Period		Balance Acquired through Acquisitions		Charged to Costs and Expenses			Charged to Other Accounts		Deductions		Balance at End of Period
	Allowance for doubtful accounts:
	Year ended December 31, 2014	$	60	$	—	$	9		$	—	$	19	$	50
	Year ended December 31, 2013	$	62	$	—	$	14		$	—	$	16	$	60
	Year ended December 31, 2012	$	77	$	—	$	14		$	—	$	29	$	62
	Valuation allowance on deferred tax assets:
	Year ended December 31, 2014	$	634	$	1	$	36		$	—	$	96	$	575
	Year ended December 31, 2013	$	240	$	—	$	450	(a)	$	—	$	56	$	634
	Year ended December 31, 2012	$	227	$	—	$	37		$	—	$	24	$	240
	Reserves for inventory obsolescence:
	Year ended December 31, 2014	$	35	$	—	$	8		$	—	$	13	$	30
	Year ended December 31, 2013	$	32	$	—	$	15		$	—	$	12	$	35
	Year ended December 31, 2012	$	27	$	—	$	13		$	—	$	8	$	32
	(a) Primarily relates to the valuation allowances for a capital loss deferred tax asset in a foreign jurisdiction that arose from the restructuring of foreign operations and net operating loss deferred tax assets in foreign jurisdictions.

Basis_of_Presentation_and_Summ1

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation—The consolidated financial statements include the accounts of CBS Corp. and all of its subsidiaries in which a controlling interest is maintained. Controlling interest is determined by majority ownership interest and the absence of substantive third party participating rights.  Investments over which the Company has a significant influence or ownership of more than 20% but less than or equal to 50%, without a controlling interest, are accounted for under the equity method.  Investments of 20% or less, over which the Company has no significant influence, are accounted for under the cost method if the fair value is not readily determinable and are accounted for as available for sale securities if the fair value is readily determinable. All significant intercompany transactions have been eliminated.
Use of Estimates	Use of Estimates—The preparation of the Company’s financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and the reported amount of revenues and expenses during the reporting period.  The Company bases its estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
Cash and Cash Equivalents	Cash and Cash Equivalents—Cash and cash equivalents consist of cash on hand and short-term (maturities of three months or less at the date of purchase) highly liquid investments, including money market funds, commercial paper and bank time deposits.
Programming Inventory	Programming Inventory—The Company acquires rights to programming and produces programming to exhibit on its broadcast and cable networks, broadcast television and radio stations, and in theaters.  The costs incurred in acquiring and producing programs are capitalized and amortized over the license period or projected useful life of the programming.  Program rights and the related liabilities are recorded at the gross amount of the liabilities when the license period has begun, the cost of the program is determinable, and the program is accepted and available for airing.
	Television production costs (which include direct production costs, production overhead and acquisition costs) are stated at the lower of unamortized cost or net realizable value. The Company then estimates total revenues to be earned and costs to be incurred throughout the life of each television program.  For television programming, estimates for remaining total lifetime revenues are limited to the amount of revenue contracted for each episode in the initial market. Accordingly, television programming costs and participation costs incurred in excess of the amount of revenue contracted for each episode in the initial market are expensed as incurred on an episode by episode basis. Estimates for all secondary market revenues such as domestic and foreign syndication, basic cable, digital streaming, home entertainment and merchandising are included in the estimated lifetime revenues of such television programming once it can be demonstrated that a program can be successfully licensed in such secondary market. Television programming costs incurred subsequent to the establishment of the secondary market are initially capitalized and amortized, and estimated liabilities for participations are accrued, based on the proportion that current period revenues bear to the estimated remaining total lifetime revenues.
	The costs incurred in acquiring television series and feature film programming are capitalized when the program is accepted and available for airing.  These costs are amortized over the period in which an economic benefit is expected to be derived based on the timing of the Company’s usage of and benefit from such programming.  The costs of programming rights licensed under multi-year sports programming agreements are capitalized if the rights payments are made before the related economic benefit has been received.  These costs are expensed over the period in which an economic benefit is expected to be derived based on the relative value of the events broadcast by the Company during a period.  The relative value for an event is determined based on the revenues generated for that event in relation to the estimated total revenues over the remaining term of the sports programming agreement.  For the Company’s multi-year sports programming agreements where the rights payments for a season approximate the relative value of the events broadcast by the Company during that season, those rights payments are expensed during such season.
	Lifetime revenue estimates for internally produced television programming, and the estimated economic benefit for the acquired programming, including revenue projections for multi-year sports programming, are periodically reviewed. Adjustments, if any, will result in changes to amortization rates, future net realizable value adjustments and/or estimated accruals for participation expense.
Property and Equipment	Property and Equipment—Property and equipment is stated at cost.  Depreciation is computed by the straight-line method over estimated useful lives as follows:
	Buildings	20 to 40 years
	Leasehold Improvements	Shorter of lease term or useful life
	Equipment and other (including capital leases)	3 to 20 years
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets—The Company assesses long-lived assets and intangible assets, other than goodwill and intangible assets with indefinite lives, for impairment whenever there is an indication that the carrying amount of the asset may not be recoverable.  Recoverability of these assets is determined by comparing the forecasted undiscounted cash flows expected to be generated by these assets, which is the estimated fair value, to their net carrying value. The amount of impairment loss, if any, will generally be measured by the difference between the net carrying value and the estimated fair value of the asset.
Impairment of Investments	Impairment of Investments—Investments are reviewed for impairment on a quarterly basis by comparing their fair value to their respective carrying amounts. The Company determines the fair value of its public company investments by reference to their publicly traded stock price. With respect to private company investments, the Company makes its estimate of fair value by considering recent investee equity transactions, discounted cash flow analyses, recent operating results, estimates based on comparable public company operating cash flow multiples and, in certain situations, balance sheet liquidation values.  If the fair value of the investment has dropped below the carrying amount, management considers several factors when determining whether an other-than-temporary decline has occurred.  These factors include the length of time and the extent to which the estimated fair value or market value has been below the carrying value, the financial condition and the near-term prospects of the investee, the intent and ability of the Company to retain its investment in the investee for a period of time sufficient to allow for any anticipated recovery in market value, and other factors influencing the fair market value, such as general market conditions.
Goodwill and Intangible Assets	Goodwill and Intangible Assets—Goodwill is allocated to various reporting units, which are generally one level below the Company’s operating segments. Intangible assets with finite lives, which primarily consist of trade names, are generally amortized using the straight-line method over their estimated useful lives, which range from 4 to 40 years.  Goodwill and other intangible assets with indefinite lives, which consist of FCC licenses, are not amortized but are tested for impairment on an annual basis and between annual tests if events occur or circumstances change that would more likely than not reduce the fair value below its carrying amount.  If the carrying value of goodwill or the intangible asset exceeds its fair value, an impairment loss is recognized as a noncash charge.
Revenue Recognition	Revenue Recognition—Advertising revenues, net of agency commissions, are recognized in the period during which advertising spots are aired or displayed.  If there is a guarantee to deliver a targeted audience rating, revenues are recognized for the actual audience rating delivered, based on the ratings data published by independent audience ratings measurement companies.  Revenues are deferred for any shortfall in the audience rating with respect to an advertising spot until such time as the required audience rating is delivered.
	Revenues from the licensing of television programming are recognized in the period that the television series is made available to the licensee, which may cause fluctuations in operating results.  Television series initially produced for networks and first-run syndication are generally licensed to domestic and international markets concurrently.  The more successful network series are later licensed for digital streaming and to television stations, cable networks, and additional international markets.  The length of the revenue cycle for television series will vary depending on the number of seasons a series remains in active production.
	Affiliate and subscription fees for cable and broadcast networks, television stations and online content are recognized in the period the service is provided.  Costs for advertising and marketing services provided to the Company by cable, satellite and other distributors are recorded in selling, general and administrative expenses.
	Publishing revenues are recognized when merchandise is shipped or electronically delivered to the consumer.  The Company records a provision for sales returns and allowances at the time of sale based upon historical trends which allow for a percentage of revenue recognized.
	Deferred revenues primarily consist of revenues related to advertising arrangements and the licensing of television programming for which the revenues have not yet been earned.  The amounts classified as current are expected to be earned within the next twelve months.
	Sales of Multiple Products or Services—Revenues derived from a single sales contract that contains multiple products and services are allocated based on the relative fair value of each delivered item and recognized in accordance with the applicable revenue recognition criteria for the specific unit of accounting.
Collaborative Arrangements	Collaborative Arrangements—Collaborative arrangements primarily consist of joint efforts with third parties to produce and distribute programming such as television series and live sporting events, including the 14-year agreement between the Company and Turner Broadcasting System, Inc. to telecast the NCAA Division I Men’s Basketball Championship (“NCAA Tournament”), which began in 2011.  In connection with this agreement for the NCAA Tournament, advertisements aired on the CBS Television Network are recorded as revenues and the Company’s share of the program rights fees and other operating costs are recorded as operating expenses.
	For episodic television programming, co-production costs are initially capitalized as programming inventory and amortized over the television series’ estimated economic life.  In such arrangements where the Company has distribution rights, all proceeds generated from such distribution are recorded as revenues and any participation profits due to third party collaborators are recorded as operating expenses.  In co-production arrangements where third party collaborators have distribution rights, the Company’s net participating profits are recorded as revenues.
Advertising	Advertising—Advertising costs are expensed as incurred.
Interest	Interest—Costs associated with the refinancing or issuance of debt, as well as debt discounts or premiums, are recorded as interest over the term of its related debt.  The Company may enter into interest rate exchange agreements; the amount to be paid or received under such agreements is accrued and recognized over the life of the agreements as an adjustment to interest expense.
Income Taxes	Income Taxes—The provision for income taxes includes federal, state, local, and foreign taxes. Deferred tax assets and liabilities are recognized for the estimated future tax effects of temporary differences between the financial statement carrying amounts and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the year in which the temporary differences are expected to be reversed. The Company evaluates the realizability of deferred tax assets and establishes a valuation allowance when it is more likely than not that all or a portion of deferred tax assets will not be realized. For tax positions taken in a previously filed tax return or expected to be taken in a future tax return, the Company evaluates each position to determine whether it is more likely than not that the tax position will be sustained upon examination, based on the technical merits of the position. A tax position that meets the more-likely-than-not recognition threshold is subject to a measurement assessment to determine the amount of benefit to recognize in the Consolidated Statement of Operations and the appropriate reserve to establish, if any. If a tax position does not meet the more-likely-than-not recognition threshold a tax reserve is established and no benefit is recognized.  A number of years may elapse before a tax return containing tax matters for which a reserve has been established is audited and finally resolved.
Foreign Currency Translation and Transactions	Foreign Currency Translation and Transactions—The Company’s assets and liabilities denominated in foreign currencies are translated at foreign exchange rates in effect at the balance sheet date, while results of operations are translated at average foreign exchange rates for the respective periods.  The resulting translation gains or losses are included as a separate component of stockholders’ equity in accumulated other comprehensive income (loss).  Foreign currency transaction gains and losses have been included in “Other items, net” in the Consolidated Statements of Operations.
Provision for Doubtful Accounts	Provision for Doubtful Accounts—The provision for doubtful accounts is estimated based on historical bad debt experience, the aging of accounts receivable, industry trends and economic indicators, as well as recent payment history for specific customers.
Net Earnings (Loss) per Common Share	Net Earnings (Loss) per Common Share—Basic earnings (loss) per share (“EPS”) is based upon net earnings (loss) divided by the weighted average number of common shares outstanding during the period.  Diluted EPS reflects the effect of the assumed exercise of stock options and vesting of restricted stock units (“RSUs”) and market-based performance share units (“PSUs”) only in the periods in which such effect would have been dilutive.
Stock-based Compensation	Stock-based Compensation—The Company measures the cost of employee services received in exchange for an award of equity instruments based on the grant-date fair value of the award.  The cost is recognized over the vesting period during which an employee is required to provide service in exchange for the award.

Basis_of_Presentation_and_Summ2

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Property and Equipment	Property and Equipment—Property and equipment is stated at cost.  Depreciation is computed by the straight-line method over estimated useful lives as follows:
	Buildings	20 to 40 years
	Leasehold Improvements	Shorter of lease term or useful life
	Equipment and other (including capital leases)	3 to 20 years
	At December 31,	2014				2013
	Land	$	240			$	239
	Buildings	717				691
	Capital leases	165				165
	Equipment and other	2,042				1,965
		3,164				3,060
	Less accumulated depreciation and amortization	1,731				1,599
	Net property and equipment	$	1,433			$	1,461
Reconciliation from Basic to Diluted Shares	The table below presents a reconciliation of weighted average shares used in the calculation of basic and diluted EPS.
	Year Ended December 31,	2014			2013			2012
	(in millions)
	Weighted average shares for basic EPS	550			608			642
	Dilutive effect of shares issuable under stock-based compensation plans	11			16			17
	Weighted average shares for diluted EPS	561			624			659
Accumulated Other Comprehensive Income	Accumulated Other Comprehensive Income —The following table presents the changes in the components of accumulated other comprehensive income (loss).
		Continuing Operations														Discontinued Operations
						Net Actuarial							Change in							Accumulated
		Cumulative				Gain (Loss)				Unrealized			Fair Value of			Other				Other
		Translation				and Prior				Gain on			Cash Flow			Comprehensive				Comprehensive
		Adjustments				Service Cost				Securities			Hedges			Income (Loss)			(b)	Loss
	At December 31, 2011	$	159			$	(800	)		$	2		$	—		$	200			$	(439	)
	Other comprehensive income (loss)	9				(136		)		—			—			(3		)		(130		)
	At December 31, 2012	168				(936		)		2			—			197				(569		)
	Other comprehensive income (loss) before reclassifications	(2		)		163				1			—			(4		)		158
	Reclassifications to net earnings	—				44			(a)	—			—			(178		)	(c)	(134		)
	Other comprehensive income (loss)	(2		)		207				1			—			(182		)		24
	At December 31, 2013	166				(729		)		3			—			15				(545		)
	Other comprehensive income (loss) before reclassifications	(8		)		(189		)		—			(1		)	15				(183		)
	Reclassifications to net earnings	—				26			(a)	(3		)	—			(30		)	(c)	(7		)
	Other comprehensive loss	(8		)		(163		)		(3		)	(1		)	(15		)		(190		)
	At December 31, 2014	$	158			$	(892	)		$	—		$	(1	)	$	—			$	(735	)
	(a) Reflects amortization of net actuarial losses. See Note 14.
	(b) Primarily reflects cumulative translation adjustments.
	(c) Reclassified in connection with the disposal of Outdoor Americas in 2014 and Outdoor Europe in 2013. See Note 4.
Stock-based Compensation	The following table summarizes the Company’s stock-based compensation expense for the years ended December 31, 2014, 2013 and 2012.
	Year Ended December 31,	2014				2013				2012
	RSUs and PSUs	$	131			$	129			$	105
	Stock options and equivalents	23				93				42
	Stock-based compensation expense, before income taxes	154				222				147
	Related tax benefit	(60		)		(86		)		(57		)
	Stock-based compensation expense, net of tax benefit	$	94			$	136			$	90

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment—Property and equipment is stated at cost.  Depreciation is computed by the straight-line method over estimated useful lives as follows:
	Buildings	20 to 40 years
	Leasehold Improvements	Shorter of lease term or useful life
	Equipment and other (including capital leases)	3 to 20 years
	At December 31,	2014		2013
	Land	$	240	$	239
	Buildings	717		691
	Capital leases	165		165
	Equipment and other	2,042		1,965
		3,164		3,060
	Less accumulated depreciation and amortization	1,731		1,599
	Net property and equipment	$	1,433	$	1,461

Goodwill_and_Other_Intangible_1

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Book Value of Goodwill by Segment	For the years ended December 31, 2014 and 2013, the changes in the book value of goodwill by segment were as follows:
			Balance at										Balance at
			31-Dec-13						Acquisitions				31-Dec-14
	Entertainment:
	Goodwill			$	9,467				$	—				$	9,467
	Accumulated impairment losses			(6,294		)			—					(6,294		)
	Goodwill, net of impairment			3,173					—					3,173
	Cable Networks:
	Goodwill			480					—					480
	Accumulated impairment losses			—					—					—
	Goodwill, net of impairment			480					—					480
	Publishing:
	Goodwill			406					—					406
	Accumulated impairment losses			—					—					—
	Goodwill, net of impairment			406					—					406
	Local Broadcasting:
	Goodwill			22,244					110			(a)		22,354
	Accumulated impairment losses			(19,715		)			—					(19,715		)
	Goodwill, net of impairment			2,529					110					2,639
	Total:
	Goodwill			32,597					110					32,707
	Accumulated impairment losses			(26,009		)			—					(26,009		)
	Goodwill, net of impairment			$	6,588				$	110				$	6,698
	(a) Amount primarily reflects goodwill acquired in the radio station swap with Beasley Broadcast Group, Inc. At December 31, 2013, the allocated goodwill, net of accumulated impairment relating to the stations disposed of in the swap was included in “Assets held for sale” on the Consolidated Balance Sheet and as a result is not included in the changes in book value above.
		Balance at														Balance at
		31-Dec-12						Acquisitions				Other				31-Dec-13
	Entertainment:
	Goodwill		$	9,460				$	7			$	—				$	9,467
	Accumulated impairment losses		(6,294		)			—				—					(6,294		)
	Goodwill, net of impairment		3,166					7				—					3,173
	Cable Networks:
	Goodwill		480					—				—					480
	Accumulated impairment losses		—					—				—					—
	Goodwill, net of impairment		480					—				—					480
	Publishing:
	Goodwill		407					—				(1		)			406
	Accumulated impairment losses		—					—				—					—
	Goodwill, net of impairment		407					—				(1		)			406
	Local Broadcasting:
	Goodwill		22,244					—				—					22,244
	Accumulated impairment losses		(19,715		)			—				—					(19,715		)
	Goodwill, net of impairment		2,529					—				—					2,529
	Total:
	Goodwill		32,591					7				(1		)			32,597
	Accumulated impairment losses		(26,009		)			—				—					(26,009		)
	Goodwill, net of impairment		$	6,582				$	7			$	(1	)			$	6,588
Schedule of Indefinite-lived Intangible Assets	The Company’s intangible assets were as follows:
						Accumulated
	At December 31, 2014	Gross				Amortization				Net
	Intangible assets subject to amortization:
	Trade names	$	220			$	(54	)		$	166
	Other intangible assets	167				(129		)		38
	Total intangible assets subject to amortization	387				(183		)		204
	FCC licenses (a)	5,804				—				5,804
	Total intangible assets	$	6,191			$	(183	)		$	6,008
						Accumulated
	At December 31, 2013	Gross				Amortization				Net
	Intangible assets subject to amortization:
	Trade names	$	222			$	(42	)		$	180
	Other intangible assets	211				(159		)		52
	Total intangible assets subject to amortization	433				(201		)		232
	FCC licenses (a)	5,638				—				5,638
	Total intangible assets	$	6,071			$	(201	)		$	5,870
	(a) The increase in FCC licenses from December 31, 2013 to December 31, 2014 relates to the radio stations acquired in the radio station swap with Beasley Broadcast Group, Inc. At December 31, 2013, the FCC licenses relating to the radio stations disposed of in the swap were included in “Assets held for sale” on the Consolidated Balance Sheet.
Schedule of Finite-lived Intangible Assets	The Company’s intangible assets were as follows:
						Accumulated
	At December 31, 2014	Gross				Amortization				Net
	Intangible assets subject to amortization:
	Trade names	$	220			$	(54	)		$	166
	Other intangible assets	167				(129		)		38
	Total intangible assets subject to amortization	387				(183		)		204
	FCC licenses (a)	5,804				—				5,804
	Total intangible assets	$	6,191			$	(183	)		$	6,008
						Accumulated
	At December 31, 2013	Gross				Amortization				Net
	Intangible assets subject to amortization:
	Trade names	$	222			$	(42	)		$	180
	Other intangible assets	211				(159		)		52
	Total intangible assets subject to amortization	433				(201		)		232
	FCC licenses (a)	5,638				—				5,638
	Total intangible assets	$	6,071			$	(201	)		$	5,870
	(a) The increase in FCC licenses from December 31, 2013 to December 31, 2014 relates to the radio stations acquired in the radio station swap with Beasley Broadcast Group, Inc. At December 31, 2013, the FCC licenses relating to the radio stations disposed of in the swap were included in “Assets held for sale” on the Consolidated Balance Sheet.
Schedule of Expected Amortization Expense	The Company expects its aggregate annual amortization expense for existing intangible assets subject to amortization for each of the years, 2015 through 2019, to be as follows:
		2015				2016				2017				2018				2019
	Amortization expense	$	24			$	19			$	15			$	13			$	13

Discontinued_Operations_Tables

Discontinued Operations (Tables)	12 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	The following table presents the major classes of assets and liabilities of the Company’s discontinued operations.
	At December 31,	2014				2013
	Current assets	$	—			$	351
	Goodwill	—				1,866
	Intangible assets	—				366
	Net property and equipment	—				763
	Other assets	39				129
	Total Assets	$	39			$	3,475
	Current liabilities	$	26			$	254
	Other liabilities	118				477
	Total Liabilities	$	144			$	731
	The following table sets forth details of net earnings from discontinued operations for the years ended December 31, 2014, 2013 and 2012.
	Year Ended December 31,	2014				2013			2012
	Revenues from discontinued operations	$	677			$	1,695		$	1,873
	Earnings (loss) from discontinued operations	$	79			$	(12	)	$	128
	Income tax provision	(26		)		—			(62		)
	Earnings (loss) from discontinued operations, net of tax	53				(12		)	66
	Gain on disposal	1,557				159			—
	Income tax provision	—				(6		)	—
	Gain on disposal, net of tax	1,557				153			—
	Less: Net earnings from discontinued operations attributable to noncontrolling interest, net of tax	5				—			—
	Net earnings from discontinued operations attributable to CBS Corp.	$	1,605			$	141		$	66
	This transaction resulted in a gain of $1.56 billion for the year ended December 31, 2014 which is calculated as follows:
	Fair value of CBS Corp. Class B Common Stock accepted		$	2,721
	(44,723,131 shares at $60.85 per share on July 16, 2014)
	Carrying value of Outdoor Americas		(1,162		)
	Accumulated other comprehensive income		30
	Transaction costs		(32		)
	Net gain on split-off of Outdoor Americas		$	1,557

Restructuring_Charges_Tables

Restructuring Charges (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring Charges [Abstract]
Restructuring Reserve Rollforward
		Balance at				2014				2014			Balance at
		31-Dec-13				Charges				Payments			31-Dec-14
	Entertainment		$	8		$	8			$	(8	)		$	8
	Cable Networks		1			—				(1		)		—
	Publishing		1			1				(2		)		—
	Local Broadcasting		4			14				(6		)		12
	Corporate		1			3				(2		)		2
	Total		$	15		$	26			$	(19	)		$	22
			2013		2013			Balance at
			Charges		Payments			31-Dec-13
	Entertainment		$	12	$	(4	)		$	8
	Cable Networks		1		—				1
	Publishing		1		—				1
	Local Broadcasting		5		(1		)		4
	Corporate		1		—				1
	Total		$	20	$	(5	)		$	15

Programming_and_Other_Inventor1

Programming and Other Inventory (Tables)	12 Months Ended
	Dec. 31, 2014
Inventory Disclosure [Abstract]
Current Programming and Other Inventory
	At December 31,	2014		2013
	Program rights	$	1,471	$	1,331
	Television programming:
	Released (including acquired libraries)	983		878
	In process and other	179		139
	Theatrical programming:
	Released	23		38
	In process and other	36		32
	Publishing, primarily finished goods	47		51
	Total programming and other inventory	2,739		2,469
	Less current portion	922		772
	Total noncurrent programming and other inventory	$	1,817	$	1,697
Noncurrent Programming and Other Inventory
	At December 31,	2014		2013
	Program rights	$	1,471	$	1,331
	Television programming:
	Released (including acquired libraries)	983		878
	In process and other	179		139
	Theatrical programming:
	Released	23		38
	In process and other	36		32
	Publishing, primarily finished goods	47		51
	Total programming and other inventory	2,739		2,469
	Less current portion	922		772
	Total noncurrent programming and other inventory	$	1,817	$	1,697

Related_Parties_Tables

Related Parties (Tables)	12 Months Ended
	Dec. 31, 2014
Related Party Transactions [Abstract]
Amounts Due from Viacom Inc	The following table presents the amounts due from Viacom Inc. in the normal course of business as reflected on the Company’s Consolidated Balance Sheets. Amounts due to Viacom Inc. were minimal at December 31, 2014 and 2013.
	At December 31,	2014		2013
	Receivables	$	107	$	84
	Other assets (Receivables, noncurrent)	76		115
	Total amounts due from Viacom Inc.	$	183	$	199

Bank_Financing_and_Debt_Tables

Bank Financing and Debt (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Schedule of Debt	The Company's debt consists of the following (a):
	At December 31,	2014			2013
	Commercial paper	$	616		$	475
	8.875% Notes due 2014	—			99
	7.625% Senior Debentures due 2016	200			200
	1.95% Senior Notes due 2017	398			397
	4.625% Senior Notes due 2018	313			317
	8.875% Senior Notes due 2019	—			592
	2.30% Senior Notes due 2019	598			—
	5.75% Senior Notes due 2020	500			500
	4.30% Senior Notes due 2021	300			300
	3.375% Senior Notes due 2022	695			695
	7.875% Debentures due 2023	187			224
	7.125% Senior Notes due 2023 (b)	46			52
	3.70% Senior Notes due 2024	599			—
	7.875% Senior Debentures due 2030	839			1,270
	5.50% Senior Debentures due 2033	428			428
	5.90% Senior Notes due 2040	299			299
	4.85% Senior Notes due 2042	488			488
	4.90% Senior Notes due 2044	543			—
	Obligations under capital leases	97			113
	Total debt (c)	7,146			6,449
	Less discontinued operations debt (d)	—			14
	Total debt from continuing operations	7,146			6,435
	Less commercial paper	616			475
	Less current portion	20			20
	Total long-term debt from continuing operations, net of current portion	$	6,510		$	5,940
	(a) Unless otherwise noted, the long-term debt instruments are issuances of CBS Corp. and are guaranteed by CBS Operations Inc.
	(b) Debt instrument is an issuance of CBS Broadcasting Inc., a wholly owned subsidiary of CBS Corp., and has no guarantor.
	(c) At December 31, 2014 and December 31, 2013, the senior debt balances included (i) a net unamortized discount of $21 million and $13 million, respectively, and (ii) an increase in the carrying value of the debt relating to previously settled fair value hedges of $14 million and $18 million, respectively.  The face value of the Company’s total debt was $7.15 billion at December 31, 2014 and $6.44 billion at December 31, 2013.
	(d) Included in "Liabilities of discontinued operations" on the Consolidated Balance Sheets.
Scheduled Maturities of Long-term Debt at Face Value	At December 31, 2014, the Company’s scheduled maturities of long-term debt at face value, excluding capital leases, were as follows:
													2020 and
		2015		2016			2017		2018		2019		Thereafter
	Long-term debt	$	—	$	200		$	400	$	300	$	600	$	4,940

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Fair Value Measurements
	At December 31, 2014	Level 1		Level 2		Level 3		Total
	Assets:
	Investments	$	80	$	—	$	—	$	80
	Foreign currency hedges	—		6		—		6
	Total Assets	$	80	$	6	$	—	$	86
	Liabilities:							$	—
	Deferred compensation	$	—	$	307	$	—	$	307
	Foreign currency hedges	—		2		—		2
	Total Liabilities	$	—	$	309	$	—	$	309
	At December 31, 2013	Level 1		Level 2		Level 3		Total
	Assets:
	Investments	$	83	$	—	$	—	$	83
	Foreign currency hedges	—		3		—		3
	Total Assets	$	83	$	3	$	—	$	86
	Liabilities:							$	—
	Deferred compensation	$	—	$	268	$	—	$	268
	Foreign currency hedges	—		4		—		4
	Total Liabilities	$	—	$	272	$	—	$	272

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2014
Stockholders' Equity Note [Abstract]
Rollforward of RSU and PSU Activity	The following table summarizes the Company’s RSU and PSU activity.
							Weighted Average
		RSUs and PSUs					Grant Date Fair Value
	Non-vested at December 31, 2013		9,519,224					$	31.2
	Granted		2,789,721					$	62.7
	Vested		(4,929,780	)				$	28.56
	Forfeited		(422,899	)				$	43.23
	Converted to Outdoor Americas RSUs		(256,172	)				$	37.77
	Non-vested at December 31, 2014		6,700,094					$	45.26
Weighted Average Assumptions for Black-Scholes Option Pricing Model	The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted average assumptions:
		2014			2013			2012
	Expected dividend yield	1.25	%		1.49	%		1.92	%
	Expected stock price volatility	33.06	%		34.86	%		39.09	%
	Risk-free interest rate	1.6	%		0.97	%		0.94	%
	Expected term of options (years)	5			5			5.02
Rollforward of Stock Option Activity	The following table summarizes the Company’s stock option activity under the Plans.
							Weighted Average
		Stock Options					Exercise Price
	Outstanding at December 31, 2013		27,974,627					$	24.78
	Granted		2,039,818					$	65.91
	Exercised		(13,534,632	)				$	20.87
	Forfeited or expired		(625,755	)				$	32.3
	Converted to Outdoor Americas stock options		(219,741	)				$	33.27
	Outstanding at December 31, 2014		15,634,317					$	33.12
	Exercisable at December 31, 2014		8,615,711					$	25.15
Stock Option Exercise Information	The following table summarizes other information relating to stock option exercises during the years ended December 31, 2014, 2013 and 2012.
	Year Ended December 31,	2014				2013				2012
	Cash received from stock option exercises	$	283			$	146			$	168
	Tax benefit of stock option exercises	$	200			$	88			$	67
	Intrinsic value of stock option exercises	$	517			$	229			$	174
Stock Options Outstanding and Exercisable by Price	The following table summarizes information concerning outstanding and exercisable stock options to purchase CBS Corp. Class B Common Stock under the Plans at December 31, 2014.
		Outstanding										Exercisable
					Remaining		Weighted						Weighted
	Range of	Number of			Contractual		Average					Number	Average
	Exercise Price	Options			Life (Years)		Exercise Price					of Options	Exercise Price
	$5 to 9.99	757,967			2.23			$	5.26			757,967		$	5.26
	$10 to 19.99	604,593			3.36			$	14.09			604,593		$	14.09
	$20 to 29.99	8,417,067			3.7			$	25.81			5,690,194		$	25.68
	$30 to 39.99	1,426,662			5.4			$	34.05			1,083,333		$	33.92
	$40 to 49.99	2,400,080			6.16			$	44.14			477,893		$	44.38
	$50 to 59.99	9,521			6.82			$	59.94			1,731		$	59.94
	$60 to 69.99	2,018,427			7.13			$	65.91			—		$	—
		15,634,317										8,615,711

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S. and Foreign Components of Earnings From Continuing Operations Before Income Taxes and Equity in Loss of Investee Companies	The U.S. and foreign components of earnings from continuing operations before income taxes and equity in loss of investee companies were as follows:
	Year Ended December 31,	2014			2013			2012
	United States	$	1,790		$	2,283		$	2,030
	Foreign	374			382			327
	Total	$	2,164		$	2,665		$	2,357
Income Tax Provision Components	The components of the provision for income taxes were as follows:
	Year Ended December 31,	2014			2013			2012
	Current:
	Federal	$	(14	)	$	310		$	236
	State and local	22			74			61
	Foreign	62			61			62
		70			445			359
	Deferred	692			433			453
	Provision for income taxes	$	762		$	878		$	812
Reconciliation of U.S. Federal Statutory Income Tax Rate	The difference between income taxes expected at the U.S. federal statutory income tax rate of 35% and the provision for income taxes is summarized as follows:
	Year Ended December 31,	2014			2013			2012
	Taxes on income at U.S. federal statutory rate	$	758		$	933		$	825
	State and local taxes, net of federal tax benefit	93			101			84
	Effect of foreign operations	(90		)	(92		)	(67		)
	Audit settlements, net	(7		)	(17		)	(3		)
	Other, net (a)	8			(47		)	(27		)
	Provision for income taxes	$	762		$	878		$	812
	(a) For 2013 and 2012, amounts primarily reflect the Company’s domestic production deduction.
Components of Deferred Income Tax Assets and Liabilities	The following table summarizes the components of deferred income tax assets and liabilities.
	At December 31,	2014			2013
	Deferred income tax assets:
	Reserves and other accrued liabilities	$	743		$	798
	Pension, postretirement and other employee benefits	794			697
	Tax credit and loss carryforwards	628			664
	Other	113			151
	Total deferred income tax assets	2,278			2,310
	Valuation allowance	(575		)	(634		)
	Deferred income tax assets, net	1,703			1,676
	Deferred income tax liabilities:
	Intangible assets	(2,432		)	(2,305		)
	Unbilled licensing receivables	(532		)	(345		)
	Property, equipment and other assets	(151		)	(176		)
	Total deferred income tax liabilities	(3,115		)	(2,826		)
	Deferred income tax liabilities, net	$	(1,412	)	$	(1,150	)
Change in Reserve for Uncertain Tax Positions	The following table sets forth the change in the reserve for uncertain tax positions, excluding related accrued interest and penalties.
	At January 1, 2012	$	189
	Additions for current year tax positions	12
	Additions for prior year tax positions	10
	Reductions for prior year tax positions	(32		)
	Cash settlements	(5		)
	Statute of limitations lapses	(2		)
	At December 31, 2012	172
	Additions for current year tax positions	11
	Additions for prior year tax positions	14
	Reductions for prior year tax positions	(40		)
	Cash settlements	(17		)
	Statute of limitations lapses	(1		)
	At December 31, 2013	139
	Additions for current year tax positions	14
	Additions for prior year tax positions	31
	Reductions for prior year tax positions	(26		)
	Cash settlements	(16		)
	Statute of limitations lapses	(2		)
	At December 31, 2014	$	140

Pension_and_Other_Postretireme1

Pension and Other Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2014
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Change in Benefit Obligations	The following table sets forth the change in benefit obligation for the Company’s pension and postretirement benefit plans.
		Pension Benefits								Postretirement Benefits
		2014				2013				2014				2013
	Change in benefit obligation:
	Benefit obligation, beginning of year	$	5,022			$	5,511			$	589			$	676
	Service cost	31				38				—				—
	Interest cost	237				211				25				26
	Actuarial loss (gain)	444				(311		)		5				(51		)
	Benefits paid	(396		)		(415		)		(74		)		(79		)
	Participants’ contributions	—				—				11				10
	Retiree Medicare drug subsidy	—				—				6				7
	Settlements	(1		)		—				—				—
	Cumulative translation adjustments	(14		)		(12		)		—				—
	Benefit obligation, end of year	$	5,323			$	5,022			$	562			$	589
Change in Plan Assets	The following table sets forth the change in plan assets for the Company’s pension and postretirement benefit plans.
		Pension Benefits								Postretirement Benefits
		2014				2013				2014				2013
	Change in plan assets:
	Fair value of plan assets, beginning of year	$	4,184			$	4,234			$	5			$	5
	Actual return on plan assets	402				178				—				—
	Employer contributions	50				199				57				62
	Benefits paid	(396		)		(415		)		(74		)		(79		)
	Participants’ contributions	—				—				11				10
	Retiree Medicare drug subsidy	—				—				6				7
	Settlements	(1		)		—				—				—
	Cumulative translation adjustments	(15		)		(12		)		—				—
	Fair value of plan assets, end of year	$	4,224			$	4,184			$	5			$	5
Funded Status and Amounts Recognized on Consolidated Balance Sheets	The funded status of pension and postretirement benefit obligations and the related amounts recognized on the Company’s Consolidated Balance Sheets were as follows:
		Pension Benefits								Postretirement Benefits
	At December 31,	2014				2013				2014				2013
	Funded status at end of year	$	(1,099	)		$	(838	)		$	(557	)		$	(584	)
	Amounts recognized on the Consolidated Balance Sheets:
	Other assets	$	15			$	17			$	—			$	—
	Current liabilities	(50		)		(50		)		(57		)		(62		)
	Noncurrent liabilities	(1,064		)		(805		)		(500		)		(522		)
	Net amounts recognized	$	(1,099	)		$	(838	)		$	(557	)		$	(584	)
Amounts Recognized in Accumulated Other Comprehensive Income (Loss)	The following amounts were recognized in accumulated other comprehensive income (loss) on the Consolidated Balance Sheets.
		Pension Benefits								Postretirement Benefits
	At December 31,	2014				2013				2014				2013
	Net actuarial (loss) gain	$	(1,774	)		$	(1,533	)		$	222			$	248
	Net prior service (cost) credit	(10		)		(11		)		—				1
	Share of equity investee	(1		)		—				—				—
		(1,785		)		(1,544		)		222				249
	Deferred income taxes	706				612				(35		)		(46		)
	Net amount recognized in accumulated other	$	(1,079	)		$	(932	)		$	187			$	203
	comprehensive income (loss)
Schedule of Accumulated Benefit Obligations in Excess of Plan Assets	Information for the pension plans with an accumulated benefit obligation in excess of plan assets is set forth below.
	At December 31,	2014				2013
	Projected benefit obligation	$	5,200			$	4,890
	Accumulated benefit obligation	$	5,111			$	4,814
	Fair value of plan assets	$	4,085			$	4,036
Components of Net Periodic Benefit Cost	The following tables present the components of net periodic benefit cost and amounts recognized in other comprehensive income (loss).
		Pension Benefits												Postretirement Benefits
	Year Ended December 31,	2014				2013				2012				2014				2013			2012
	Components of net periodic cost:
	Service cost	$	31			$	38			$	34			$	—			$	—		$	—
	Interest cost	237				211				240				25				26			33
	Expected return on plan assets	(262		)		(271		)		(247		)		—				—			—
	Amortization of actuarial losses (gains)	63				85				70				(21		)		(16		)	(16		)
	Amortization of prior service cost (credit)	1				1				1				(1		)		(1		)	(1		)
	Net periodic cost	$	70			$	64			$	98			$	3			$	9		$	16
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
		Pension				Postretirement
	Year Ended December 31, 2014	Benefits				Benefits
	Other comprehensive income (loss):
	Actuarial loss	$	(304	)		$	(5	)
	Amortization of actuarial losses (gains) (a)	63				(21		)
	Amortization of prior service cost (credit) (a)	1				(1		)
	Share of equity investee	(1		)		—
		(241		)		(27		)
	Deferred income taxes	94				11
	Recognized in other comprehensive income, net of tax	$	(147	)		$	(16	)
	(a)  Reflects amounts reclassified from accumulated other comprehensive income (loss) to net earnings.
Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Costs
		Pension						Postretirement
		Benefits						Benefits
		2014			2013			2014			2013
	Weighted average assumptions used to determine benefit obligations at December 31:
	Discount rate	4.1	%		4.9	%		3.8	%		4.5	%
	Rate of compensation increase	3	%		3	%		N/A			N/A
	Weighted average assumptions used to determine net periodic costs for the year ended December 31:
	Discount rate	4.9	%		4	%		4.5	%		4	%
	Expected long-term return on plan assets	6.5	%		6.5	%		2	%		2	%
	Rate of compensation increase	3	%		3	%		N/A			N/A
	N/A - not applicable
Assumptions Regarding Heath Care Cost Trend Rates for Postretirement Benefits	The following additional assumptions were used in accounting for postretirement benefits.
		2014			2013
	Projected health care cost trend rate for participants of age 65 and below	7	%		7.5	%
	Projected health care cost trend rate for participants above age 65	7	%		7.5	%
	Ultimate trend rate	5	%		5	%
	Year ultimate trend rate is achieved for participants of age 65 and below	2019			2019
	Year ultimate trend rate is achieved for participants above 65	2019			2019
Impact of One Percentage Point Change in Assumed Health Care Trend Rates	A one percentage point change in assumed health care cost trend rates would have the following effects:
		One Percentage				One Percentage
		Point Increase				Point Decrease
	Effect on total service and interest cost components	$	—			$	—
	Effect on the accumulated postretirement benefit obligation	$	9			$	(9	)
Fair Value of Pension Pan Assets
	At December 31, 2014	Level 1				Level 2				Level 3				Total
	Cash and cash equivalents (a)	$	5			$	43			$	—			$	48
	Fixed income securities:
	U.S. treasury securities	139				—				—				139
	Government-related securities	49				301				—				350
	Corporate bonds (b)	—				2,560				—				2,560
	Mortgage-backed and asset-backed securities	—				116				3				119
	Equity securities: (c)
	U.S. large capitalization	258				349				—				607
	U.S. small capitalization	74				2				—				76
	International equity (d)	—				242				—				242
	Limited partnerships	—				—				56				56
	Other	—				27				—				27
	Total Assets	$	525			$	3,640			$	59			$	4,224
	At December 31, 2013	Level 1				Level 2				Level 3				Total
	Cash and cash equivalents (a)	$	8			$	55			$	—			$	63
	Fixed income securities:
	U.S. treasury securities	133				—				—				133
	Government-related securities	44				234				—				278
	Corporate bonds (b)	—				2,373				—				2,373
	Mortgage-backed and asset-backed securities	—				128				4				132
	Equity securities: (c)
	U.S. large capitalization	345				355				—				700
	U.S. small capitalization	98				3				—				101
	International equity (d)	—				291				—				291
	Limited partnerships	—				—				55				55
	Other	—				58				—				58
	Total Assets	$	628			$	3,497			$	59			$	4,184
	(a) Assets categorized as Level 2 reflect investments in money market funds.
	(b)  Securities of diverse industries, substantially all investment grade.
	(c)  Assets categorized as Level 2 reflect investments in common collective funds.
	(d) Includes investments in emerging market funds of $50 million and $59 million at December 31, 2014 and 2013, respectively.
Changes in Fair Value of Level 3 Assets	The table below sets forth a summary of changes in the fair value of investments reflected as Level 3 at December 31, 2014.
		Limited				Mortgage-backed				Total
		Partnerships				Securities
	At January 1, 2013	$	52			$	4			$	56
	Actual return related to investments held at end of year	4				—				4
	Distributions	(1		)		—				(1		)
	At December 31, 2013	55				4				59
	Actual return related to investments held at end of year	1				—				1
	Distributions	—				(1		)		(1		)
	At December 31, 2014	$	56			$	3			$	59
Estimated Future Benefit Payments	Estimated future benefit payments are as follows:
		2015				2016				2017				2018				2019			2020-2024
	Pension	$	398			$	388			$	381			$	372			$	364		$	1,691
	Postretirement	$	67			$	65			$	62			$	59			$	57		$	236
	Retiree Medicare drug subsidy	$	9			$	9			$	8			$	8			$	8		$	36
Participation in Multi-employer Defined Benefit Pension Plan	The table below presents information concerning the Company’s participation in multiemployer defined benefit pension plans.
																				Expiration
			Employer		Pension															Date of
			Identification		Protection Act															Collective-
			Number/Pension		Zone Status (a)			Company Contributions												Bargaining
	Pension Plan		Plan Number		2014	2013		2014				2013				2012				Agreement
	AFTRA Retirement Plan (b)		13-6414972-001		Green	Green		$	7			$	7			$	7			(c)
	Directors Guild of America - Producer		95-2892780-001		Green	Green		5				5				4				6/30/17
	Producer-Writers Guild of America		95-2216351-001		Green	Green		10				8				8				5/1/17
	Screen Actors Guild - Producers		95-2110997-001		Green	Green		7				7				6				6/30/17
	Motion Picture Industry		95-1810805-001		Green	Green		8				7				7				(d)
	Other Plans							10				8				6
			Total contributions					$	47			$	42			$	38
	(a) The Zone status for each individual plan listed was certified by each plan’s actuary as of the beginning of the plan years for 2014 and 2013. The plan year is the twelve months ending December 31 for each plan listed above except AFTRA Retirement Plan which has a plan year ending November 30.
	(b) The Company was listed in AFTRA Retirement Plan’s Form 5500 as providing more than 5% of total contributions for the plan year ended November 30, 2013.
	(c) The expiration dates range from June 30, 2017 through November 15, 2017.
	(d) The expiration dates range from March 2, 2015 through March 2, 2016.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Commitments	At December 31, 2014, future minimum rental payments under noncancellable operating leases with terms in excess of one year and payments under capital leases are as follows:
		Leases
		Capital		Operating
	2015	$	20	$	177
	2016	19		147
	2017	15		134
	2018	15		116
	2019	14		100
	2020 and thereafter	30		440
	Total minimum payments	$	113	$	1,114
	Less amounts representing interest	16
	Present value of minimum payments	$	97
	At December 31, 2014, commitments for programming and talent and purchase obligations not recorded on the balance sheet and other long-term contractual obligations recorded on the balance sheet were payable as follows:
		Programming and Talent		Purchase Obligations		Other Long-Term Contractual Obligations
	2015	$	2,429	$	183		$	—
	2016	2,094		159			726
	2017	1,743		129			318
	2018	1,563		109			127
	2019	1,577		98			82
	2020 and thereafter	4,317		158			69
	Total	$	13,723	$	836		$	1,322

Reportable_Segments_Tables

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Revenues by Segment	The following tables set forth the Company’s financial performance by reportable segment.  The Company’s operating segments, which are the same as its reportable segments, have been determined in accordance with the Company’s internal management structure, which is organized based upon products and services.
	Year Ended December 31,	2014			2013			2012
	Revenues:
	Entertainment	$	8,309		$	8,645		$	7,694
	Cable Networks	2,176			2,069			1,772
	Publishing	778			809			790
	Local Broadcasting	2,756			2,696			2,774
	Corporate/Eliminations	(213		)	(214		)	(210		)
	Total Revenues	$	13,806		$	14,005		$	12,820
Intercompany Revenues by Segment
	Year Ended December 31,	2014			2013			2012
	Intercompany Revenues:
	Entertainment	$	206		$	208		$	203
	Cable Networks	1			—			—
	Local Broadcasting	18			17			19
	Total Intercompany Revenues	$	225		$	225		$	222
Segment OIBDA and Reconciliation to Consolidated Net Earnings (Loss)
	Year Ended December 31,	2014			2013			2012
	Segment OIBDA:
	Entertainment	$	1,455		$	1,758		$	1,549
	Cable Networks	997			898			811
	Publishing	107			113			89
	Local Broadcasting	965			898			957
	Corporate	(269		)	(332		)	(292		)
	Total Segment OIBDA	3,255			3,335			3,114
	Restructuring charges	(26		)	(20		)	(19		)
	Impairment charges	(52		)	—			(11		)
	Depreciation and amortization	(281		)	(290		)	(306		)
	Operating income	2,896			3,025			2,778
	Interest expense	(363		)	(375		)	(401		)
	Interest income	13			8			5
	Net loss on early extinguishment of debt	(352		)	—			(32		)
	Other items, net	(30		)	7			7
	Earnings from continuing operations before income taxes and	2,164			2,665			2,357
	equity in loss of investee companies
	Provision for income taxes	(762		)	(878		)	(812		)
	Equity in loss of investee companies, net of tax	(48		)	(49		)	(37		)
	Net earnings from continuing operations	1,354			1,738			1,508
	Net earnings from discontinued operations, net of tax	1,605			141			66
	Net earnings	$	2,959		$	1,879		$	1,574
Operating Income (Loss) by Segment
	Year Ended December 31,	2014			2013			2012
	Operating Income (Loss):
	Entertainment	$	1,308		$	1,593		$	1,381
	Cable Networks	974			877			785
	Publishing	100			106			80
	Local Broadcasting	812			807			848
	Corporate	(298		)	(358		)	(316		)
	Total Operating Income	$	2,896		$	3,025		$	2,778
Depreciation and Amortization by Segment
	Year Ended December 31,	2014			2013			2012
	Depreciation and Amortization
	Entertainment	$	139		$	153		$	161
	Cable Networks	23			20			26
	Publishing	6			6			6
	Local Broadcasting	87			86			90
	Corporate	26			25			23
	Total Depreciation and Amortization	$	281		$	290		$	306
Stock-based Compensation by Segment
	Year Ended December 31,	2014			2013			2012
	Stock-based Compensation
	Entertainment	$	56		$	56		$	49
	Cable Networks	9			8			6
	Publishing	4			4			3
	Local Broadcasting	28			27			24
	Corporate	57			127			65
	Total Stock-based Compensation	$	154		$	222		$	147
Capital Expenditures by Segment
	Year Ended December 31,	2014			2013			2012
	Capital Expenditures
	Entertainment	$	94		$	101		$	92
	Cable Networks	16			16			18
	Publishing	4			4			5
	Local Broadcasting	65			64			64
	Corporate	27			27			21
	Total Capital Expenditures	$	206		$	212		$	200
Assets by Segment
	At December 31,	2014			2013
	Assets:
	Entertainment	$	10,469		$	9,657
	Cable Networks	2,113			1,968
	Publishing	990			1,026
	Local Broadcasting	9,585			9,600
	Corporate	876			661
	Discontinued operations	39			3,475
	Total Assets	$	24,072		$	26,387
Revenues by Type
	Year Ended December 31,	2014			2013			2012
	Revenues by Type
	Advertising	$	7,204		$	7,525		$	7,191
	Content licensing and distribution	3,990			3,997			3,468
	Affiliate and subscription fees	2,362			2,221			1,921
	Other	250			262			240
	Total Revenues	$	13,806		$	14,005		$	12,820
Revenues by Customer Location
	Year Ended December 31,	2014			2013			2012
	Revenues: (a)
	United States	$	12,013		$	12,178		$	11,275
	International	1,793			1,827			1,545
	Total Revenues	$	13,806		$	14,005		$	12,820
	(a) Revenue classifications are based on customers’ locations.
Long-lived Assets by Geographic Area
	At December 31,	2014			2013
	Long-lived Assets: (a)
	United States	$	17,881		$	20,169
	International	328			533
	Total Long-lived Assets	$	18,209		$	20,702
	(a) Reflects total assets from both continuing and discontinued operations less current assets, investments and noncurrent deferred tax assets.

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information
	Year Ended December 31,	2014		2013		2012
	Cash paid for interest (a)	$	707	$	360	$	440
	Cash paid for income taxes:
	Continuing operations	$	217	$	294	$	331
	Discontinued operations	42		92		75
	Total	$	259	$	386	$	406
	(a) Includes payments associated with the early extinguishment of debt of $360 million in 2014 and $60 million in 2012, mainly for early redemption premiums.
	Year Ended December 31,	2014		2013		2012
	Noncash investing and financing activities:
	Shares received in Split-Off (see Note 4)	$	2,721	$	—	$	—
	Equipment acquired under capitalized leases	$	1	$	58	$	13
	Radio station swap (See Note 3)	$	262	$	—	$	—
	Contingent consideration associated with acquisitions	$	—	$	—	$	4

Quarterly_Financial_Data_unaud1

Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Data (Unaudited)
		First			Second			Third			Fourth
	2014 (a)	Quarter			Quarter			Quarter			Quarter			Total Year
	Revenues:
	Entertainment	$	2,303		$	1,835		$	1,911		$	2,260		$	8,309
	Cable Networks	537			516			624			499			2,176
	Publishing	153			211			199			215			778
	Local Broadcasting	626			665			680			785			2,756
	Corporate/Eliminations	(49		)	(39		)	(47		)	(78		)	(213		)
	Total Revenues	$	3,570		$	3,188		$	3,367		$	3,681		$	13,806
	Segment OIBDA:
	Entertainment	$	457		$	376		$	335		$	287		$	1,455
	Cable Networks	259			219			272			247			997
	Publishing	13			24			43			27			107
	Local Broadcasting	200			238			214			313			965
	Corporate	(67		)	(56		)	(50		)	(96		)	(269		)
	Total Segment OIBDA	862			801			814			778			3,255
	Restructuring charges	—			—			(26		)	—			(26		)
	Impairment charge	—			—			(52		)	—			(52		)
	Depreciation and amortization	(71		)	(71		)	(68		)	(71		)	(281		)
	Total Operating Income	$	791		$	730		$	668		$	707		$	2,896
	Operating Income (Loss):
	Entertainment	$	420		$	341		$	294		$	253		$	1,308
	Cable Networks	254			213			266			241			974
	Publishing	11			23			41			25			100
	Local Broadcasting	179			215			126			292			812
	Corporate	(73		)	(62		)	(59		)	(104		)	(298		)
	Total Operating Income	$	791		$	730		$	668		$	707		$	2,896
	Net earnings from continuing operations	$	462		$	418		$	72		$	402		$	1,354
	Net earnings	$	468		$	439		$	1,639		$	413		$	2,959
	Basic net earnings per common share:
	Net earnings from continuing operations	$	0.79		$	0.73		$	0.14		$	0.78		$	2.46
	Net earnings	$	0.8		$	0.77		$	3.08		$	0.8		$	5.38
	Diluted net earnings per common share:
	Net earnings from continuing operations	$	0.77		$	0.72		$	0.13		$	0.77		$	2.41
	Net earnings	$	0.78		$	0.76		$	3.03		$	0.79		$	5.27
	Weighted average number of common shares
	outstanding:
	Basic	585			570			532			515			550
	Diluted	600			581			541			523			561
	Dividends per common share	$	0.12		$	0.12		$	0.15		$	0.15		$	0.54
	(a)  On July 16, 2014, the Company completed the Split-Off of Outdoor Americas and as a result, Outdoor Americas has been presented as a discontinued operation in the consolidated financial statements for all periods presented.
		First			Second			Third			Fourth
	2013 (a) (b)	Quarter			Quarter			Quarter			Quarter			Total Year
	Revenues:
	Entertainment	$	2,539		$	2,008		$	1,884		$	2,214		$	8,645
	Cable Networks	478			518			596			477			2,069
	Publishing	171			189			224			225			809
	Local Broadcasting	638			698			641			719			2,696
	Corporate/Eliminations	(63		)	(44		)	(43		)	(64		)	(214		)
	Total Revenues	$	3,763		$	3,369		$	3,302		$	3,571		$	14,005
	Segment OIBDA:
	Entertainment	$	480		$	429		$	431		$	418		$	1,758
	Cable Networks	231			207			261			199			898
	Publishing	12			21			43			37			113
	Local Broadcasting	199			255			181			263			898
	Corporate	(77		)	(64		)	(82		)	(109		)	(332		)
	Total Segment OIBDA	845			848			834			808			3,335
	Restructuring charges	—			—			—			(20		)	(20		)
	Depreciation and amortization	(74		)	(73		)	(70		)	(73		)	(290		)
	Total Operating Income	$	771		$	775		$	764		$	715		$	3,025
	Operating Income (Loss):
	Entertainment	$	440		$	391		$	394		$	368		$	1,593
	Cable Networks	227			202			255			193			877
Publishing	10			20			41			35			106
Local Broadcasting	176			234			161			236			807
Corporate	(82		)	(72		)	(87		)	(117		)	(358		)
Total Operating Income	$	771		$	775		$	764		$	715		$	3,025
Net earnings from continuing operations	$	450		$	435		$	431		$	422		$	1,738
Net earnings	$	443		$	472		$	494		$	470		$	1,879
Basic net earnings per common share:
Net earnings from continuing operations	$	0.72		$	0.71		$	0.71		$	0.7		$	2.86
Net earnings	$	0.71		$	0.78		$	0.82		$	0.78		$	3.09
Diluted net earnings per common share:
Net earnings from continuing operations	$	0.71		$	0.7		$	0.7		$	0.69		$	2.79
Net earnings	$	0.69		$	0.76		$	0.8		$	0.76		$	3.01
Weighted average number of common shares
outstanding:
Basic	621			609			603			599			608
Diluted	638			624			618			615			624
Dividends per common share	$	0.12		$	0.12		$	0.12		$	0.12		$	0.48
(a)  On July 16, 2014, the Company completed the Split-Off of Outdoor Americas and as a result, Outdoor Americas has been presented as a discontinued operation in the consolidated financial statements for all periods presented.
(b) During 2013, the Company completed the sale of Outdoor Europe which has been presented as a discontinued operation in the consolidated financial statements for all periods presented.

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2014
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Condensed Consolidating Statements of Operations
		Statement of Operations
		For the Year Ended December 31, 2014
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Revenues	$	159		$	11		$	13,636		$	—		$	13,806
	Expenses:
	Operating	68			6			8,015			—			8,089
	Selling, general and administrative	61			255			2,146			—			2,462
	Restructuring charges	—			3			23			—			26
	Impairment charge	—			—			52			—			52
	Depreciation and amortization	6			16			259			—			281
	Total expenses	135			280			10,495			—			10,910
	Operating income (loss)	24			(269		)	3,141			—			2,896
	Interest (expense) income, net	(443		)	(383		)	476			—			(350		)
	Loss on early extinguishment of debt	(351		)	—			(1		)	—			(352		)
	Other items, net	(1		)	4			(33		)	—			(30		)
	Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies	(771		)	(648		)	3,583			—			2,164
	Benefit (provision) for income taxes	280			229			(1,271		)	—			(762		)
	Equity in earnings (loss) of investee companies,	3,444			1,270			(48		)	(4,714		)	(48		)
	net of tax
	Net earnings from continuing operations	2,953			851			2,264			(4,714		)	1,354
	Net earnings (loss) from discontinued operations, net of tax	6			(1		)	1,600			—			1,605
	Net earnings	$	2,959		$	850		$	3,864		$	(4,714	)	$	2,959
	Total comprehensive income	$	2,769		$	857		$	3,819		$	(4,676	)	$	2,769
		Statement of Operations
		For the Year Ended December 31, 2013
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Revenues	$	145		$	11		$	13,849		$	—		$	14,005
	Expenses:
	Operating	69			8			8,047			—			8,124
	Selling, general and administrative	65			323			2,158			—			2,546
	Restructuring charges	—			1			19			—			20
	Depreciation and amortization	6			14			270			—			290
	Total expenses	140			346			10,494			—			10,980
	Operating income (loss)	5			(335		)	3,355			—			3,025
	Interest (expense) income, net	(457		)	(369		)	459			—			(367		)
	Other items, net	—			4			3			—			7
	Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies	(452		)	(700		)	3,817			—			2,665
	Benefit (provision) for income taxes	152			235			(1,265		)	—			(878		)
	Equity in earnings (loss) of investee companies,	2,170			1,288			(49		)	(3,458		)	(49		)
	net of tax
	Net earnings from continuing operations	1,870			823			2,503			(3,458		)	1,738
	Net earnings (loss) from discontinued operations, net of tax	9			(5		)	137			—			141
	Net earnings	$	1,879		$	818		$	2,640		$	(3,458	)	$	1,879
	Total comprehensive income	$	1,903		$	815		$	2,463		$	(3,278	)	$	1,903
		Statement of Operations
		For the Year Ended December 31, 2012
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Revenues	$	157		$	15		$	12,648		$	—		$	12,820
	Expenses:
	Operating	74			8			7,182			—			7,264
	Selling, general and administrative	87			251			2,104			—			2,442
	Restructuring charges	—			2			17			—			19
	Impairment charge	—			—			11			—			11
	Depreciation and amortization	6			14			286			—			306
	Total expenses	167			275			9,600			—			10,042
	Operating income (loss)	(10		)	(260		)	3,048			—			2,778
	Interest (expense) income, net	(480		)	(351		)	435			—			(396		)
Net loss on early extinguishment of debt	(32		)	—			—			—			(32		)
Other items, net	1			(5		)	11			—			7
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies	(521		)	(616		)	3,494			—			2,357
Benefit (provision) for income taxes	183			215			(1,210		)	—			(812		)
Equity in earnings (loss) of investee companies,	1,886			1,145			(37		)	(3,031		)	(37		)
net of tax
Net earnings from continuing operations	1,548			744			2,247			(3,031		)	1,508
Net earnings (loss) from discontinued operations, net of tax	26			(3		)	43			—			66
Net earnings	$	1,574		$	741		$	2,290		$	(3,031	)	$	1,574
Total comprehensive income	$	1,444		$	734		$	2,298		$	(3,032	)	$	1,444
Condensed Consolidating Balance Sheets
		Balance Sheet
		At December 31, 2014
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Assets
	Cash and cash equivalents	$	63		$	1		$	364		$	—		$	428
	Receivables, net	29			2			3,428			—			3,459
	Programming and other inventory	4			3			915			—			922
	Prepaid expenses and other current assets	306			27			477			(30		)	780
	Total current assets	402			33			5,184			(30		)	5,589
	Property and equipment	41			162			2,961			—			3,164
	Less accumulated depreciation and amortization	15			98			1,618			—			1,731
	Net property and equipment	26			64			1,343			—			1,433
	Programming and other inventory	7			8			1,802			—			1,817
	Goodwill	98			62			6,538			—			6,698
	Intangible assets	—			—			6,008			—			6,008
	Investments in consolidated subsidiaries	41,144			11,685			—			(52,829		)	—
	Other assets	219			17			2,252			—			2,488
	Intercompany	—			2,726			21,772			(24,498		)	—
	Assets of discontinued operations	—			—			39			—			39
	Total Assets	$	41,896		$	14,595		$	44,938		$	(77,357	)	$	24,072
	Liabilities and Stockholders' Equity
	Accounts payable	$	3		$	24		$	275		$	—		$	302
	Participants' share and royalties payable	—			—			999			—			999
	Program rights	5			3			396			—			404
	Commercial paper	616			—			—			—			616
	Current portion of long-term debt	4			—			16			—			20
	Accrued expenses and other current liabilities	388			270			1,038			(30		)	1,666
	Current liabilities of discontinued operations	—			—			26			—			26
	Total current liabilities	1,016			297			2,750			(30		)	4,033
	Long-term debt	6,383			—			127			—			6,510
	Other liabilities	3,029			249			3,163			—			6,441
	Liabilities of discontinued operations	—			—			118			—			118
	Intercompany	24,498			—			—			(24,498		)	—
	Stockholders' Equity:
	Preferred stock	—			—			126			(126		)	—
	Common stock	1			123			590			(713		)	1
	Additional paid-in capital	44,041			—			60,894			(60,894		)	44,041
	Retained earnings (deficit)	(21,931		)	14,260			(18,111		)	3,851			(21,931		)
	Accumulated other comprehensive income (loss)	(735		)	(3		)	81			(78		)	(735		)
		21,376			14,380			43,580			(57,960		)	21,376
	Less treasury stock, at cost	14,406			331			4,800			(5,131		)	14,406
	Total Stockholders' Equity	6,970			14,049			38,780			(52,829		)	6,970
	Total Liabilities and Stockholders' Equity	$	41,896		$	14,595		$	44,938		$	(77,357	)	$	24,072
		Balance Sheet
		At December 31, 2013
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Assets
	Cash and cash equivalents	$	80		$	1		$	287		$	—		$	368
	Receivables, net	30			2			3,202			—			3,234
	Programming and other inventory	4			2			766			—			772
	Prepaid expenses and other current assets	179			18			474			(26		)	645
	Current assets of discontinued operations	—			—			351			—			351
	Total current assets	293			23			5,080			(26		)	5,370
	Property and equipment	37			137			2,886			—			3,060
	Less accumulated depreciation and amortization	9			83			1,507			—			1,599
	Net property and equipment	28			54			1,379			—			1,461
	Programming and other inventory	5			—			1,692			—			1,697
	Goodwill	98			62			6,428			—			6,588
	Intangible assets	—			—			5,870			—			5,870
Investments in consolidated subsidiaries	40,454			10,415			—			(50,869		)	—
Other assets	89			18			1,856			—			1,963
Assets held for sale	—			—			314			—			314
Intercompany	—			3,240			18,409			(21,649		)	—
Assets of discontinued operations	—			—			3,124			—			3,124
Total Assets	$	40,967		$	13,812		$	44,152		$	(72,544	)	$	26,387
Liabilities and Stockholders' Equity
Accounts payable	$	1		$	8		$	277		$	—		$	286
Participants' share and royalties payable	—			—			1,008			—			1,008
Program rights	5			2			391			—			398
Commercial paper	475			—			—			—			475
Current portion of long-term debt	5			—			15			—			20
Accrued expenses and other current liabilities	361			293			1,138			(26		)	1,766
Current liabilities of discontinued operations	—			—			254			—			254
Total current liabilities	847			303			3,083			(26		)	4,207
Long-term debt	5,791			—			149			—			5,940
Other liabilities	2,714			317			2,766			—			5,797
Liabilities of discontinued operations	—			—			477			—			477
Intercompany	21,649			—			—			(21,649		)	—
Stockholders' Equity:
Preferred stock	—			—			126			(126		)	—
Common stock	1			123			953			(1,076		)	1
Additional paid-in capital	43,474			—			61,678			(61,678		)	43,474
Retained earnings (deficit)	(24,890		)	13,410			(20,406		)	6,996			(24,890		)
Accumulated other comprehensive income (loss)	(545		)	(10		)	126			(116		)	(545		)
	18,040			13,523			42,477			(56,000		)	18,040
Less treasury stock, at cost	8,074			331			4,800			(5,131		)	8,074
Total Stockholders' Equity	9,966			13,192			37,677			(50,869		)	9,966
Total Liabilities and Stockholders' Equity	$	40,967		$	13,812		$	44,152		$	(72,544	)	$	26,387
Condensed Consolidating Statement of Cash Flows
		Statement of Cash Flows
		For the Year Ended December 31, 2014
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Net cash flow (used for) provided by operating activities	$	(1,107	)	$	(194	)	$	2,576		$	—		$	1,275
	Investing Activities:
	Acquisitions, net of cash acquired	—			—			(27		)	—			(27		)
	Capital expenditures	—			(27		)	(179		)	—			(206		)
	Investments in and advances to investee companies	—			—			(98		)	—			(98		)
	Proceeds from sale of investments	—			—			12			—			12
	Proceeds from dispositions	—			—			7			—			7
	Other investing activities	(4		)	—			—			—			(4		)
	Net cash flow used for investing activities from continuing operations	(4		)	(27		)	(285		)	—			(316		)
	Net cash flow used for investing activities from discontinued operations	(29		)	—			(256		)	—			(285		)
	Net cash flow used for investing activities	(33		)	(27		)	(541		)	—			(601		)
	Financing Activities:
	Proceeds from short-term debt borrowings, net	141			—			—			—			141
	Proceeds from issuance of notes	1,728			—			—			—			1,728
	Repayment of notes and debentures	(1,146		)	—			(6		)	—			(1,152		)
	Payment of capital lease obligations	—			—			(17		)	—			(17		)
	Dividends	(292		)	—			—			—			(292		)
	Purchase of Company common stock	(3,595		)	—			—			—			(3,595		)
	Payment of payroll taxes in lieu of issuing shares	(146		)	—			—			—			(146		)
	for stock-based compensation
	Proceeds from exercise of stock options	283			—			—			—			283
	Excess tax benefit from stock-based compensation	243			—			—			—			243
	Other financing activities	(3		)	—			—			—			(3		)
	Increase (decrease) in intercompany payables	3,921			221			(4,142		)	—			—
	Net cash flow provided by (used for) financing activities from continuing operations	1,134			221			(4,165		)	—			(2,810		)
	Net cash flow (used for) provided by financing activities from discontinued operations	(11		)	—			2,178			—			2,167
	Net cash flow provided by (used for) financing activities	1,123			221			(1,987		)	—			(643		)
	Net (decrease) increase in cash and cash equivalents	(17		)	—			48			—			31
	Cash and cash equivalents at beginning of period (includes $29 of discontinued operations cash)	80			1			316			—			397
	Cash and cash equivalents at end of period	$	63		$	1		$	364		$	—		$	428
		Statement of Cash Flows
		For the Year Ended December 31, 2013
		CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
					Operations			Guarantor						Consolidated
					Inc.			Affiliates
	Net cash flow (used for) provided by operating activities	$	(934	)	$	(187	)	$	2,994		$	—		$	1,873
	Investing Activities:
	Acquisitions, net of cash acquired	—			—			(20		)	—			(20		)
	Capital expenditures	—			(27		)	(185		)	—			(212		)
	Investments in and advances to investee companies	—			—			(176		)	—			(176		)
	Proceeds from sale of investments	23			1			6			—			30
	Proceeds from dispositions	—			—			164			—			164
	Net cash flow provided by (used for) investing activities from continuing operations	23			(26		)	(211		)	—			(214		)
	Net cash flow used for investing activities from discontinued operations	—			—			(58		)	—			(58		)
	Net cash flow provided by (used for) investing activities	23			(26		)	(269		)	—			(272		)
	Financing Activities:
	Proceeds from short-term debt borrowings, net	475			—			—			—			475
	Payment of capital lease obligations	—			—			(17		)	—			(17		)
	Payment of contingent consideration	—			—			(30		)	—			(30		)
	Dividends	(300		)	—			—			—			(300		)
	Purchase of Company common stock	(2,185		)	—			—			—			(2,185		)
	Payment of payroll taxes in lieu of issuing shares	(145		)	—			—			—			(145		)
	for stock-based compensation
	Proceeds from exercise of stock options	146			—			—			—			146
	Excess tax benefit from stock-based compensation	148			—			—			—			148
	Other financing activities	(4		)	—			—			—			(4		)
	Increase (decrease) in intercompany payables	2,602			213			(2,815		)	—			—
	Net cash flow provided by (used for) financing activities	737			213			(2,862		)	—			(1,912		)
Net decrease in cash and cash equivalents	(174		)	—			(137		)	—			(311		)
Cash and cash equivalents at beginning of period (includes $21 of discontinued operations cash)	254			1			453			—			708
Cash and cash equivalents at end of period	$	80		$	1		$	316		$	—		$	397
(includes $29 of discontinued operations cash)
	Statement of Cash Flows
	For the Year Ended December 31, 2012
	CBS Corp.			CBS			Non-			Eliminations			CBS Corp.
				Operations			Guarantor						Consolidated
				Inc.			Affiliates
Net cash flow (used for) provided by operating activities	$	(827	)	$	(179	)	$	2,821		$	—		$	1,815
Investing Activities:
Acquisitions, net of cash acquired	—			—			(146		)	—			(146		)
Capital expenditures	—			(21		)	(179		)	—			(200		)
Investments in and advances to investee companies	—			—			(91		)	—			(91		)
Proceeds from sale of investments	9			2			2			—			13
Proceeds from dispositions	—			—			49			—			49
Net cash flow provided by (used for) investing activities from continuing operations	9			(19		)	(365		)	—			(375		)
Net cash flow used for investing activities from discontinued operations	—			—			(76		)	—			(76		)
Net cash flow provided by (used for) investing activities	9			(19		)	(441		)	—			(451		)
Financing Activities:
Proceeds from issuance of notes	1,566			—			—			—			1,566
Repayment of notes and debentures	(1,583		)	—			—			—			(1,583		)
Payment of capital lease obligations	—			—			(19		)	—			(19		)
Payment of contingent consideration	—			—			(33		)	—			(33		)
Dividends	(276		)	—			—			—			(276		)
Purchase of Company common stock	(1,137		)	—			—			—			(1,137		)
Payment of payroll taxes in lieu of issuing shares	(105		)	—			—			—			(105		)
for stock-based compensation
Proceeds from exercise of stock options	168			—			—			—			168
Excess tax benefit from stock-based compensation	103			—			—			—			103
Increase (decrease) in intercompany payables	2,202			198			(2,400		)	—			—
Net cash flow provided by (used for) financing activities	938			198			(2,452		)	—			(1,316		)
Net increase (decrease) in cash and cash equivalents	120			—			(72		)	—			48
Cash and cash equivalents at beginning of period (includes $38 of discontinued operations cash)	134			1			525			—			660
Cash and cash equivalents at end of period	$	254		$	1		$	453		$	—		$	708
(includes $21 of discontinued operations cash)

Basis_of_Presentation_and_Summ3

Basis of Presentation and Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended	3 Months Ended									6 Months Ended	12 Months Ended
	Apr. 02, 2014	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Apr. 02, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 16, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of shares of CBS Outdoor Americas Inc common stock offered in IPO						23,000,000
Percentage of CBS Outdoor Americas offered in IPO	19.00%					19.00%
Shares of CBS Class B Common Stock received in Split-Off transaction															44,723,131
Percentage of CBS Outdoor Americas owned by CBS	81.00%										0.00%
Shares of CBS Outdoor Americas stock held by parent	97,000,000	0				97,000,000					0	0
Noncurrent receivables		$1,940,000,000					$1,560,000,000				$1,940,000,000	$1,940,000,000	$1,560,000,000
Advertising expense												410,000,000	449,000,000	419,000,000
Provision for doubtful accounts charged to expense												$9,000,000	$14,000,000	$14,000,000
Earnings Per Share [Abstract]
Weighted average shares for basic EPS		515,000,000	532,000,000	570,000,000	585,000,000		599,000,000	603,000,000	609,000,000	621,000,000		550,000,000	608,000,000	642,000,000
Dilutive effect of shares issuable under stock-based compensation plans												11,000,000	16,000,000	17,000,000
Weighted average shares for diluted EPS		523,000,000	541,000,000	581,000,000	600,000,000		615,000,000	618,000,000	624,000,000	638,000,000		561,000,000	624,000,000	659,000,000
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share												2,000,000	2,000,000	4,000,000
Maximum [Member]
Property, Plant and Equipment [Line Items]
Finite-lived intangible asset useful life												40 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
Finite-lived intangible asset useful life												4 years
Building [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life												40 years
Building [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life												20 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Leasehold improvement estimated useful life												Shorter of lease term or useful life
Equipment and other (including capital leases) [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life												20 years
Equipment and other (including capital leases) [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property and equipment estimated useful life												3 years

Basis_of_Presentation_and_Summ4

Basis of Presentation and Summary of Significant Accounting Policies Additional Disclosures (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Comprehensive Income (Loss), Net of Tax [Abstract]
Tax (provision) benefit on net actuarial gain (loss) and prior service costs related to pension and other postretirement plans	$105	($132)	$80
Total other comprehensive income (loss), net of tax	-190	24	-130
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income (loss), net of tax	-735	-545	-569	-439
Other comprehensive income (loss), before reclassifications, net of tax	-183	158
Reclassifications from accumulated other comprehensive income (loss) to net earnings	-7	-134
Stock Based Compensation [Abstract]
Stock-based compensation expense, before income taxes	154	222	147
Continuing Operations [Member]
Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative translation adjustment	-8	-2	9
Net actuarial gain (loss) and prior service cost	-163	207	-136
Unrealized gain (loss) on securities	-3	1	0
Changes in fair value of cash flow hedges	-1	0	0
Total other comprehensive income (loss), net of tax	-175	206	-127
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Cumulative translation adjustments, accumulated other comprehensive income	158	166	168	159
Net actuarial gain (loss) and prior service costs, accumulated other comprehensive income	-892	-729	-936	-800
Unrealized gain (loss) on securities, accumulated other comprehensive income	0	3	2	2
Change in fair value of cash flow hedges, accumulated other comprehensive income	-1	0	0	0
Stock Based Compensation [Abstract]
RSUs and PSUs	131	129	105
Stock options and equivalents	23	93	42
Stock-based compensation expense, before income taxes	154	222	147
Related tax benefit	-60	-86	-57
Stock-based compensation expense, net of tax benefit	94	136	90
Continuing Operations [Member] | Cumulative translation adjustments [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss), before reclassifications, net of tax	-8	-2
Reclassifications from accumulated other comprehensive income (loss) to net earnings	0	0
Continuing Operations [Member] | Net actuarial gain (loss) and prior service cost [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss), before reclassifications, net of tax	-189	163
Reclassifications from accumulated other comprehensive income (loss) to net earnings	26	44
Continuing Operations [Member] | Unrealized gain on securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss), before reclassifications, net of tax	0	1
Reclassifications from accumulated other comprehensive income (loss) to net earnings	-3	0
Continuing Operations [Member] | Change in fair value of cash flow hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other comprehensive income (loss), before reclassifications, net of tax	-1	0
Reclassifications from accumulated other comprehensive income (loss) to net earnings	0	0
Discontinued Operations [Member]
Comprehensive Income (Loss), Net of Tax [Abstract]
Tax on other comprehensive income (loss)		-3	1
Total other comprehensive income (loss), net of tax	-15	-182	-3
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated other comprehensive income (loss), net of tax	0	15	197	200
Other comprehensive income (loss), before reclassifications, net of tax	15	-4	-3
Reclassifications from accumulated other comprehensive income (loss) to net earnings	-30	-178	0
Stock Based Compensation [Abstract]
Stock-based compensation expense, net of tax benefit	$5	$15	$7

Property_and_Equipment_Details

Property and Equipment (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Abstract]
Land	$240	$239
Buildings	717	691
Capital leases	165	165
Equipment and other	2,042	1,965
Property and equipment, gross	3,164	3,060
Less accumulated depreciation and amortization	1,731	1,599
Net property and equipment (Note 2)	1,433	1,461
Depreciation expense, including capitalized lease amortization	249	251	261
Amortization expense related to capital leases	17	17	19
Accumulated amortization of capital leases	$78	$62

Goodwill_and_Other_Intangible_2

Goodwill and Other Intangible Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Roll Forward]
Goodwill, gross	$32,707	$32,597	$32,591
Accumulated impairment losses	-26,009	-26,009	-26,009
Goodwill, net of impairment	6,698	6,588	6,582
Acquisitions	110	7
Goodwill, Other Changes		-1
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, gross	387	433
Accumulated amortization	-183	-201
Finite-lived intangible assets, net	204	232
Indefinite-lived Intangible Assets [Line Items]
Total intangible assets, gross	6,191	6,071
Total intangible assets, net	6,008	5,870
Amortization expense	32	39	45
Future amortization expense [Abstract]
2015	24
2016	19
2017	15
2018	13
2019	13
FCC licenses [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-Lived Intangible Assets (Excluding Goodwill)	5,804	5,638
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, gross	220	222
Accumulated amortization	-54	-42
Finite-lived intangible assets, net	166	180
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangibles assets, gross	167	211
Accumulated amortization	-129	-159
Finite-lived intangible assets, net	38	52
Goodwill Gross [Member]
Goodwill [Roll Forward]
Acquisitions	110	7
Goodwill, Other Changes		-1
Accumulated Impairment Losses [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		0
Operating segments [Member] | Entertainment Segment [Member]
Goodwill [Roll Forward]
Goodwill, gross	9,467	9,467	9,460
Accumulated impairment losses	-6,294	-6,294	-6,294
Goodwill, net of impairment	3,173	3,173	3,166
Acquisitions	0	7
Goodwill, Other Changes		0
Operating segments [Member] | Entertainment Segment [Member] | Goodwill Gross [Member]
Goodwill [Roll Forward]
Acquisitions	0	7
Goodwill, Other Changes		0
Operating segments [Member] | Entertainment Segment [Member] | Accumulated Impairment Losses [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		0
Operating segments [Member] | Cable Networks Segment [Member]
Goodwill [Roll Forward]
Goodwill, gross	480	480	480
Accumulated impairment losses	0	0	0
Goodwill, net of impairment	480	480	480
Acquisitions	0	0
Goodwill, Other Changes		0
Operating segments [Member] | Cable Networks Segment [Member] | Goodwill Gross [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		0
Operating segments [Member] | Cable Networks Segment [Member] | Accumulated Impairment Losses [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		0
Operating segments [Member] | Publishing Segment [Member]
Goodwill [Roll Forward]
Goodwill, gross	406	406	407
Accumulated impairment losses	0	0	0
Goodwill, net of impairment	406	406	407
Acquisitions	0	0
Goodwill, Other Changes		-1
Operating segments [Member] | Publishing Segment [Member] | Goodwill Gross [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		-1
Operating segments [Member] | Publishing Segment [Member] | Accumulated Impairment Losses [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		0
Operating segments [Member] | Local Broadcasting Segment [Member]
Goodwill [Roll Forward]
Goodwill, gross	22,354	22,244	22,244
Accumulated impairment losses	-19,715	-19,715	-19,715
Goodwill, net of impairment	2,639	2,529	2,529
Acquisitions	110	0
Goodwill, Other Changes		0
Operating segments [Member] | Local Broadcasting Segment [Member] | Goodwill Gross [Member]
Goodwill [Roll Forward]
Acquisitions	110	0
Goodwill, Other Changes		0
Operating segments [Member] | Local Broadcasting Segment [Member] | Accumulated Impairment Losses [Member]
Goodwill [Roll Forward]
Acquisitions	0	0
Goodwill, Other Changes		$0

Goodwill_and_Other_Intangible_3

Goodwill and Other Intangible Assets Testing (Details)	12 Months Ended
	Dec. 31, 2014
	market
Impairment Testing Assumptions [Line Items]
Number of reporting units for which the qualitative assessment was performed	5
Number of radio markets for which the qualitative assessment was performed	5
Number of television markets for which the qualitative assessment was performed	10
Qualitative assessment threshold	20.00%
FCC Licenses Impairment Test Television Stations [Member]
Impairment Testing Assumptions [Line Items]
Discount rate	8.00%
Perpetual nominal growth rate	2.50%
Number of television markets for which the quantitative impairment test was performed	4
FCC Licenses Impairment Test Radio Stations [Member]
Impairment Testing Assumptions [Line Items]
Discount rate	8.00%
Perpetual nominal growth rate	1.50%
Number of radio markets for which the quantitative impairment test was performed	21
Goodwill Impairment Test [Member]
Impairment Testing Assumptions [Line Items]
Number of reporting units for which the first step of the goodwill impairment test was performed	2
Goodwill Impairment Test [Member] | CBS Interactive Reporting Unit [Member]
Impairment Testing Assumptions [Line Items]
Discount rate	9.50%
Perpetual nominal growth rate	3.00%
Goodwill Impairment Test [Member] | CBS Radio Reporting Unit [Member]
Impairment Testing Assumptions [Line Items]
Discount rate	8.00%
Perpetual nominal growth rate	1.50%

Goodwill_and_Other_Intangible_4

Goodwill and Other Intangible Assets Additional Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Impairment charges	$52,000,000	$0	$11,000,000
Tampa and Charlotte [Member]
Market Location [Line Items]
Number of radio stations swapped	13
Philadelphia [Member]
Market Location [Line Items]
Number of radio stations swapped	1
Number of radio stations received in swap	2
Miami [Member]
Market Location [Line Items]
Number of radio stations received in swap	3
West Palm Beach [Member]
Market Location [Line Items]
Number of radio stations sold			5

Discontinued_Operations_Detail

Discontinued Operations (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenues from discontinued operations	$677,000,000	$1,695,000,000	$1,873,000,000
Earnings (loss) from discontinued operations, net of tax [Abstract]
Earnings (loss) from discontinued operations	79,000,000	-12,000,000	128,000,000
Income tax provision, discontinued operations	-26,000,000	0	-62,000,000
Earnings (loss) from discontinued operations, net of tax	53,000,000	-12,000,000	66,000,000
Gain on disposal, net of tax [Abstract]
Gain on disposal	1,557,000,000	159,000,000	0
Income tax provision on disposal	0	-6,000,000	0
Gain on disposal, net of tax	1,557,000,000	153,000,000	0
Net earnings from discontinued operations attributable to noncontrolling interest, net of tax	5,000,000	0	0
Net earnings (loss) from discontinued operations, net of tax	1,605,000,000	141,000,000	66,000,000
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]
Current assets, discontinued operations	0	351,000,000
Goodwill, discontinued operations	0	1,866,000,000
Intangible assets, discontinued operations	0	366,000,000
Net property and equipment, discontinued operations	0	763,000,000
Other assets, discontinued operations	39,000,000	129,000,000
Total assets, discontinued operations	39,000,000	3,475,000,000
Current liabilities, discontinued operations	26,000,000	254,000,000
Noncurrent liabilities, discontinued operations	118,000,000	477,000,000
Total liabilities, discontinued operations	$144,000,000	$731,000,000

Discontinued_Operations_Additi

Discontinued Operations Additional Disclosures (Details) (USD $)	0 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Apr. 02, 2014	Jan. 31, 2014	Apr. 02, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 16, 2014
Discontinued Operations and Disposal Groups [Abstract]
Value of all consideration received from significant disposal				$4,760,000,000	$4,760,000,000	$225,000,000
Total cash received from disposition of Outdoor Americas					2,040,000,000
Cash received from debt borrowings of Outdoor Americas		1,520,000,000
Number of shares of CBS Outdoor Americas Inc common stock offered in IPO			23,000,000
Percentage of CBS Outdoor Americas offered in IPO	19.00%		19.00%
Per share IPO price of CBS Outdoor Americas	$28		$28
Aggregate proceeds from IPO, net of underwriting discounts and commissions	615,000,000
Cash received from IPO of Outdoor Americas	515,000,000
Shares of CBS Outdoor Americas common stock owned by CBS	97,000,000		97,000,000	0	0
Percentage of CBS Outdoor Americas owned by CBS	81.00%			0.00%
Shares of CBS Class B Common Stock received in Split-Off transaction								44,723,131
Share price				$55.34	$55.34			$60.85
Fair value of CBS Corp Class B common stock accepted					2,721,000,000	0	0
Carrying value of Outdoor Americas				-1,162,000,000	-1,162,000,000
Transaction costs					-32,000,000
After tax charge associated with disposition of Outdoor Europe						110,000,000
Carrying value of guarantees				28,000,000	28,000,000	40,000,000
Discontinued Operations Additional Disclosures [Line Items]
Face value of debt				7,150,000,000	7,150,000,000	6,440,000,000
Accumulated other comprehensive income					7,000,000	134,000,000
Discontinued Operations [Member]
Discontinued Operations Additional Disclosures [Line Items]
Face value of debt		1,600,000,000
Accumulated other comprehensive income					$30,000,000	$178,000,000	$0

Restructuring_Charges_Details

Restructuring Charges (Details) (USD $)	12 Months Ended			24 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$26	$20	$19
Payments for restructuring	19	5		24
Severance costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	17	14
Payments for restructuring				17
Contract termination costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	9	6
Payments for restructuring				$7

Restructuring_Charges_Rollforw

Restructuring Charges (Rollforward) (Details) (USD $)	12 Months Ended			24 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	$15
Restructuring charges	26	20	19
Payments for restructuring	-19	-5		-24
Restructuring reserve, ending balance	22	15		22
Operating segments [Member] | Entertainment Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	8
Restructuring charges	8	12
Payments for restructuring	-8	-4
Restructuring reserve, ending balance	8	8		8
Operating segments [Member] | Cable Networks Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	1
Restructuring charges	0	1
Payments for restructuring	-1	0
Restructuring reserve, ending balance	0	1		0
Operating segments [Member] | Publishing Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	1
Restructuring charges	1	1
Payments for restructuring	-2	0
Restructuring reserve, ending balance	0	1		0
Operating segments [Member] | Local Broadcasting Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	4
Restructuring charges	14	5
Payments for restructuring	-6	-1
Restructuring reserve, ending balance	12	4		12
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, beginning balance	1
Restructuring charges	3	1
Payments for restructuring	-2	0
Restructuring reserve, ending balance	$2	$1		$2

Programming_and_Other_Inventor2

Programming and Other Inventory (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]
Program rights	$1,471	$1,331
Television programming:
Released (including acquired libraries)	983	878
In process and other	179	139
Theatrical programming:
Released theatrical programming	23	38
In process and other theatrical programming	36	32
Publishing, primarily finished goods	47	51
Total programming and other inventory	2,739	2,469
Less current portion	922	772
Total noncurrent programming and other inventory	$1,817	$1,697

Related_Parties_Details

Related Parties (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
National Amusement Inc [Member]
Related Party Transaction [Line Items]
NAI ownership of CBS Corp. Class A common stock (percentage)	79.60%
NAI ownership of CBS Corp. Class A and Class B common stock on a combined basis (percentage)	7.80%
Viacom Inc [Member]
Related Party Transaction [Line Items]
Revenues from transactions with related parties	$183	$185	$211
Expenses from transactions with related parties	19	21	26
Receivables from Viacom, current	107	84
Receivables from Viacom, noncurrent	76	115
Total amounts due from Viacom	183	199
Equity Method Investee [Member]
Related Party Transaction [Line Items]
Revenues from transactions with related parties	$122	$108	$157

Investments_Details

Investments (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Equity method investments	$199	$188
Cost method investments	23	16
Investments in and advances to investee companies	$98	$176	$91
The C W [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage	50.00%
POP [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage	50.00%
AMC Networks Inc JV [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage	49.00%
Number of channels owned and operated by joint venture	6
AMC Networks Inc Other JV [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage	30.00%
Number of channels owned and operated by joint venture	9
Ten Network Holdings Limited JV [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage	33.00%
RTL Group JV [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Equity method investment ownership percentage	30.00%
Number of channels owned and operated by joint venture	2

Bank_Financing_and_Debt_Detail

Bank Financing and Debt (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 31, 2014	Aug. 31, 2014	Jan. 31, 2015
Debt Disclosure [Abstract]
Capital lease obligations	$97,000,000	$113,000,000
Less current portion	20,000,000	20,000,000
Total long-term debt from continuing operations, net of current portion	6,510,000,000	5,940,000,000
Net unamortized discount on senior debt	21,000,000	13,000,000
Increase in the carrying value of debt relating to previously settled fair value hedges	14,000,000	18,000,000
Net loss on early extinguishment of debt	352,000,000	0	32,000,000
Loss on early extinguishment of debt, net of tax	219,000,000
Debt Instrument [Line Items]
Commercial paper	616,000,000	475,000,000
Carrying value of senior debt	6,430,000,000	5,860,000,000
Face value of debt	7,150,000,000	6,440,000,000
Total Debt [Line Items]
Total debt	7,146,000,000	6,449,000,000
Long-term Debt, Fiscal Year Maturity [Abstract]
2015	0
2016	200,000,000
2017	400,000,000
2018	300,000,000
2019	600,000,000
2020 and Thereafter	4,940,000,000
Continuing Operations [Member]
Total Debt [Line Items]
Total debt	7,146,000,000	6,435,000,000
Discontinued Operations [Member]
Debt Instrument [Line Items]
Face value of debt				1,600,000,000
Total Debt [Line Items]
Total debt	0	14,000,000
Notes due 2014 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	0	99,000,000
Stated interest rate	8.88%
Notes due 2014 [Member] | Redemption or Repurchase [Member]
Debt Instrument [Line Items]
Stated interest rate	8.88%
Face amount of debt repurchased	99,000,000
Senior Debentures due 2016 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	200,000,000	200,000,000
Stated interest rate	7.63%
Senior Notes due 2017 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	398,000,000	397,000,000
Stated interest rate	1.95%
Senior Notes due 2018 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	313,000,000	317,000,000
Stated interest rate	4.63%
Senior Notes due 2019 A [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	0	592,000,000
Stated interest rate	8.88%
Senior Notes due 2019 A [Member] | Redemption or Repurchase [Member]
Debt Instrument [Line Items]
Stated interest rate	8.88%
Face amount of debt repurchased	264,000,000
Senior Notes due 2019 A [Member] | Tender Offer [Member]
Debt Instrument [Line Items]
Stated interest rate	8.88%
Face amount of debt repurchased	336,000,000
Senior Notes due 2019 B [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	598,000,000	0
Stated interest rate	2.30%				2.30%
Face value of debt					600,000,000
Senior Notes due 2020 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	500,000,000	500,000,000
Stated interest rate	5.75%
Senior Notes due 2021 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	300,000,000	300,000,000
Stated interest rate	4.30%
Senior Notes due 2022 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	695,000,000	695,000,000
Stated interest rate	3.38%
Debentures due 2023 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	187,000,000	224,000,000
Stated interest rate	7.88%
Debentures due 2023 [Member] | Tender Offer [Member]
Debt Instrument [Line Items]
Stated interest rate	7.88%
Face amount of debt repurchased	37,000,000
Senior Notes due 2023 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	46,000,000	52,000,000
Stated interest rate	7.13%
Senior Notes due 2023 [Member] | Tender Offer [Member]
Debt Instrument [Line Items]
Stated interest rate	7.13%
Face amount of debt repurchased	6,000,000
Senior Notes due 2024 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	599,000,000	0
Stated interest rate	3.70%				3.70%
Face value of debt					600,000,000
Senior Debentures due 2030 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	839,000,000	1,270,000,000
Stated interest rate	7.88%
Senior Debentures due 2030 [Member] | Tender Offer [Member]
Debt Instrument [Line Items]
Stated interest rate	7.88%
Face amount of debt repurchased	423,000,000
Senior Debentures due 2033 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	428,000,000	428,000,000
Stated interest rate	5.50%
Senior Notes due 2040 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	299,000,000	299,000,000
Stated interest rate	5.90%
Senior Notes due 2042 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	488,000,000	488,000,000
Stated interest rate	4.85%
Senior Notes due 2044 [Member]
Debt Instrument [Line Items]
Carrying value of senior debt	543,000,000	0
Stated interest rate	4.90%				4.90%
Face value of debt					550,000,000
Senior Notes Due 2025 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Stated interest rate						3.50%
Face value of debt						600,000,000
Senior Notes Due 2045 [Member] | Subsequent Event [Member]
Debt Instrument [Line Items]
Stated interest rate						4.60%
Face value of debt						$600,000,000

Bank_Financing_and_Debt_Additi

Bank Financing and Debt Additional Disclosures (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2014
Debt Disclosure [Abstract]
Face value of debt	7,150,000,000	$6,440,000,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Borrowings outstanding	0
Availability under the credit facility	2,490,000,000
Maximum borrowing capacity under the credit facility	2,500,000,000		2,000,000,000
Commercial Paper [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity under the credit facility	2,500,000,000		2,000,000,000
Weighted average interest rate	0.46%	0.28%
Consolidated Leverage Ratio [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility covenant description	4.5x
Credit facility covenant compliance	2.1x
Interest rate swap [Member]
Derivatives [Line Items]
Notional amount of derivative	600,000,000

Financial_Instruments_Details

Financial Instruments (Details) (USD $)	Dec. 31, 2014	Aug. 31, 2014	Dec. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying value of senior debt	$6,430,000,000		$5,860,000,000
Fair value of senior debt	7,150,000,000		6,690,000,000
Debt Instrument [Line Items]
Face value of debt	7,150,000,000		6,440,000,000
Interest rate swap [Member]
Derivative [Line Items]
Notional amount of derivative	600,000,000
Cash flow hedging [Member] | Foreign exchange contract [Member]
Derivative [Line Items]
Notional amount of derivative	152,000,000		136,000,000
Senior Notes due 2019 B [Member]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Carrying value of senior debt	598,000,000		0
Debt Instrument [Line Items]
Face value of debt		$600,000,000
Stated interest rate	2.30%	2.30%

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013
Assets:
Investments	$80,000,000	$83,000,000
Foreign currency hedges	6,000,000	3,000,000
Total Assets	86,000,000	86,000,000
Liabilities:
Deferred compensation	307,000,000	268,000,000
Foreign currency hedges	2,000,000	4,000,000
Total Liabilities	309,000,000	272,000,000
Impairment charges	52,000,000	0	11,000,000
Carrying value of guarantees	28,000,000	40,000,000
Level 1 [Member]
Assets:
Investments	80,000,000	83,000,000
Foreign currency hedges	0	0
Total Assets	80,000,000	83,000,000
Liabilities:
Deferred compensation	0	0
Foreign currency hedges	0	0
Total Liabilities	0	0
Level 2 [Member]
Assets:
Investments	0	0
Foreign currency hedges	6,000,000	3,000,000
Total Assets	6,000,000	3,000,000
Liabilities:
Deferred compensation	307,000,000	268,000,000
Foreign currency hedges	2,000,000	4,000,000
Total Liabilities	309,000,000	272,000,000
Level 3 [Member]
Fair value assets measured on recurring basis financial statement captions [Line Items]
Estimated fair value of guarantees				40,000,000
Assets:
Investments	0	0
Foreign currency hedges	0	0
Total Assets	0	0
Liabilities:
Deferred compensation	0	0
Foreign currency hedges	0	0
Total Liabilities	$0	$0

Stockholders_Equity_Narrative_

Stockholders' Equity (Narrative) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 16, 2014	Apr. 02, 2014
Stockholders' Equity Note [Abstract]
Dividends per common share (in dollars per share)	$0.15	$0.15	$0.12	$0.12	$0.12	$0.12	$0.12	$0.12	$0.54	$0.48	$0.44
Dividends									$296,000,000	$295,000,000	$287,000,000
Class B Common Stock purchased, value									3,612,000,000
Average price per share repurchased (in dollars per share)									$59.88
Shares of Class B Common Stock repurchased									60,300,000
Remaining authorization under repurchase program	$4,800,000,000								$4,800,000,000
Shares of CBS Class B Common Stock received in Split-Off transaction												44,723,131
Shares of CBS Outdoor Americas stock held by parent	0								0				97,000,000
Minimum Class A shares needed for conversion	5,000								5,000
Conversion of A shares into B shares									1,300,000	4,000,000	300,000
Number of shares available for future grant under equity incentive plans	58,000,000								58,000,000

Stockholders_Equity_Rollforwar

Stockholders' Equity (Rollforward of RSUs and PSUs) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
RSU and PSU activity, shares [Roll Forward]
Non-vested (shares), beginning balance	9,519,224
Granted (shares)	2,789,721
Vested (shares)	-4,929,780
Forfeited (shares)	-422,899
Converted to Outdoor Americas RSUs (shares)	-256,172
Non-vested (shares), ending balance	6,700,094
Weighted average grant date fair value of RSUs and PSUs [Abstract]
Non-vested, beginning balance	$31.20
Granted	$62.70
Vested	$28.56
Forfeited	$43.23
Converted to Outdoor Americas RSUs	$37.77
Non-vested, ending balance	$45.26

Stockholders_Equity_BlackSchol

Stockholders' Equity (Black-Scholes Assumptions) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stockholders' Equity Note [Abstract]
Weighted average grant date fair value of stock options	$18.23	$12.11	$9.05
Expected dividend yield	1.25%	1.49%	1.92%
Expected stock price volatility	33.06%	34.86%	39.09%
Risk-free interest rate	1.60%	0.97%	0.94%
Expected term of options (years)	5 years 0 months	5 years 0 months	5 years 7 days

Stockholders_Equity_Stock_Opti

Stockholders' Equity (Stock Option Rollforward) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014
Options activity, Shares [Roll Forward]
Outstanding (shares), beginning balance	27,974,627
Granted (shares)	2,039,818
Exercised (shares)	-13,534,632
Forfeited or expired (shares)	-625,755
Converted to Outdoor Americas stock options (shares)	-219,741
Outstanding (shares), ending balance	15,634,317
Stock options exercisable (shares)	8,615,711
Weighted average exercise price of options outstanding [Abstract]
Outstanding, beginning balance	$24.78
Granted	$65.91
Exercised	$20.87
Forfeited or expired	$32.30
Converted to Outdoor Americas stock options	$33.27
Outstanding, ending balance	$33.12
Stock options exercisable	$25.15

Stockholders_Equity_Other_Info

Stockholders' Equity (Other Information) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock-based compensation by award type [Line Items]
Stock option term until expiration	8 years
Aggregate fair value of RSUs and PSUs vested during the period	$319	$324	$251
Stock Options And Equivalents [Abstract]
Stock option equivalents outstanding	0.2	1.8
Stock Option Exercises Information [Abstract]
Cash received from stock option exercises	283	146	168
Tax benefit of stock option exercises	200	88	67
Intrinsic value of stock option exercises	517	229	174
Restricted Stock Units (RSUs) [Member]
Unrecognized Stock-based Compensation [Abstract]
Unrecognized future expense of unvested RSUs and PSUs	182
Weighted average period over which future expense of unrecognized stock-based compensation will be recognized (years)	2 years 3 months 18 days
Restricted Stock Units (RSUs) [Member] | Maximum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	4 years
Restricted Stock Units (RSUs) [Member] | Minimum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	1 year
Performance Shares [Member]
Stock-based compensation by award type [Line Items]
Measurement period	3 years
Performance Shares [Member] | Maximum [Member]
Stock-based compensation by award type [Line Items]
Payout on stock-based compensation award (percent)	300.00%
Performance Shares [Member] | Minimum [Member]
Stock-based compensation by award type [Line Items]
Payout on stock-based compensation award (percent)	0.00%
Service period over which grants vest	3 years
Stock Options [Member]
Unrecognized Stock-based Compensation [Abstract]
Unrecognized future expense of unvested stock options	$54
Weighted average period over which future expense of unrecognized stock-based compensation will be recognized (years)	2 years 4 months 24 days
Stock Options [Member] | Maximum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	4 years
Stock Options [Member] | Minimum [Member]
Stock-based compensation by award type [Line Items]
Service period over which grants vest	3 years

Stockholders_Equity_Stock_Opti1

Stockholders' Equity (Stock Options Outstanding and Exercisable by Exercise Price) (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Jul. 16, 2014
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Number of stock options outstanding	15,634,317
Number of stock options exercisable	8,615,711
Weighted average remaining contractual life of outstanding stock options (years)	4 years 7 months 2 days
Intrinsic value of stock options outstanding	$369
Weighted average remaining contractual life of exercisable stock options (years)	3 years 7 months 6 days
Intrinsic value of stock options exercisable	$260
Share price	$55.34	$60.85
$5 to $9.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$5
Exercise price range, upper range limit	$9.99
Number of stock options outstanding	757,967
Number of stock options exercisable	757,967
Stock options outstanding, weighted average exercise price	$5.26
Stock options exercisable, weighted average exercise price	$5.26
Weighted average remaining contractual life of outstanding stock options (years)	2 years 2 months 23 days
$10 to $19.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$10
Exercise price range, upper range limit	$19.99
Number of stock options outstanding	604,593
Number of stock options exercisable	604,593
Stock options outstanding, weighted average exercise price	$14.09
Stock options exercisable, weighted average exercise price	$14.09
Weighted average remaining contractual life of outstanding stock options (years)	3 years 4 months 10 days
$20 to $29.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$20
Exercise price range, upper range limit	$29.99
Number of stock options outstanding	8,417,067
Number of stock options exercisable	5,690,194
Stock options outstanding, weighted average exercise price	$25.81
Stock options exercisable, weighted average exercise price	$25.68
Weighted average remaining contractual life of outstanding stock options (years)	3 years 8 months 12 days
$30 to $39.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$30
Exercise price range, upper range limit	$39.99
Number of stock options outstanding	1,426,662
Number of stock options exercisable	1,083,333
Stock options outstanding, weighted average exercise price	$34.05
Stock options exercisable, weighted average exercise price	$33.92
Weighted average remaining contractual life of outstanding stock options (years)	5 years 4 months 24 days
$40 to $49.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$40
Exercise price range, upper range limit	$49.99
Number of stock options outstanding	2,400,080
Number of stock options exercisable	477,893
Stock options outstanding, weighted average exercise price	$44.14
Stock options exercisable, weighted average exercise price	$44.38
Weighted average remaining contractual life of outstanding stock options (years)	6 years 1 month 28 days
$50 to $59.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$50
Exercise price range, upper range limit	$59.99
Number of stock options outstanding	9,521
Number of stock options exercisable	1,731
Stock options outstanding, weighted average exercise price	$59.94
Stock options exercisable, weighted average exercise price	$59.94
Weighted average remaining contractual life of outstanding stock options (years)	6 years 9 months 26 days
$60 to $69.99 [Member]
Stock Options Outstanding And Exercisable By Exercise Price Range [Line Items]
Exercise price range, lower range limit	$60
Exercise price range, upper range limit	$69.99
Number of stock options outstanding	2,018,427
Number of stock options exercisable	0
Stock options outstanding, weighted average exercise price	$65.91
Stock options exercisable, weighted average exercise price	$0
Weighted average remaining contractual life of outstanding stock options (years)	7 years 1 month 17 days

Income_Taxes_Details

Income Taxes (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings (loss) from continuing operations before income taxes and equity in loss of investee companies [Abstract]
United States	$1,790	$2,283	$2,030
Foreign	374	382	327
Earnings from continuing operations before income taxes and equity in loss of investee companies	2,164	2,665	2,357
Components of provision (benefit) for income taxes [Abstract]
Current federal income tax provision (benefit)	-14	310	236
Current state and local income tax provision	22	74	61
Current foreign income tax provision	62	61	62
Total current income tax expense provision	70	445	359
Deferred tax provision	692	433	453
Provision for income taxes	762	878	812
Provision for income taxes for discontinued operations	26	6	62
Tax benefit relating to losses from equity investments	30	31	23
Effective tax rate on equity investments	38.70%	38.80%	38.80%
Income tax benefit realized from stock option exercises and RSU and PSU vests	$322	$210

Income_Taxes_2_Details

Income Taxes 2 (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation to US federal statutory rate
Taxes on income at US federal statutory rate	$758,000,000	$933,000,000	$825,000,000
State and local taxes, net of federal tax benefit	93,000,000	101,000,000	84,000,000
Effect on foreign operations	-90,000,000	-92,000,000	-67,000,000
Audit settlement, net	-7,000,000	-17,000,000	-3,000,000
Other, net	8,000,000	-47,000,000	-27,000,000
Provision for income taxes	762,000,000	878,000,000	812,000,000
Deferred income tax assets:
Reserves and other accrued liabilities	743,000,000	798,000,000
Pension, postretirement and other employee benefits	794,000,000	697,000,000
Tax credit and loss carryforwards	628,000,000	664,000,000
Other deferred income tax assets	113,000,000	151,000,000
Total deferred income tax assets	2,278,000,000	2,310,000,000
Deferred tax assets valuation allowance	-575,000,000	-634,000,000
Net deferred income tax assets	1,703,000,000	1,676,000,000
Deferred income tax liabilities:
Intangible assets	-2,432,000,000	-2,305,000,000
Unbilled licensing receivables	-532,000,000	-345,000,000
Property, equipment and other assets	-151,000,000	-176,000,000
Total deferred income tax liabilities	-3,115,000,000	-2,826,000,000
Deferred income tax liabilities, net	-1,412,000,000	-1,150,000,000
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	925,000,000
Net deferred income tax assets of discontinued operations	38,000,000
Net deferred income tax liabilities of discontinued operations		182,000,000
Company's share of undistributed earnings of foreign subsidiaries not included in its consolidated federal income tax return	3,990,000,000	4,080,000,000
Change in reserve for uncertain tax positions, excluding related accrued interest and penalties
Unrecognized tax benefits, beginning of year	139,000,000	172,000,000	189,000,000
Additions for current year tax positions	14,000,000	11,000,000	12,000,000
Additions for prior year tax positions	31,000,000	14,000,000	10,000,000
Reductions for prior year tax positions	-26,000,000	-40,000,000	-32,000,000
Cash settlements	-16,000,000	-17,000,000	-5,000,000
Statute of limitation lapses	-2,000,000	-1,000,000	-2,000,000
Unrecognized tax benefits, end of year	140,000,000	139,000,000	172,000,000
Reserve for uncertain tax positions included in liabilities of discontinued operations	48,000,000	53,000,000
Amount included in reserve for uncertain tax positions that would affect Company's effective income tax rate (including discontinued operations) if recognized	111,000,000
Interest and penalty charges related to the reserve for uncertain tax positions	14,000,000	12,000,000	13,000,000
Liabilities for accrued interest and penalty charges related to the reserve for uncertain tax positions	$50,000,000	$56,000,000
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration date	31-Dec-34
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforward expiration date	1-Jan-15

Pension_and_Other_Postretireme2

Pension and Other Postretirement Benefits (Change in Benefit Obligation) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Service period over which benefits vest	5 years
Percent of plan assets' fair value invested in Company common stock	1.90%	2.20%
Pension benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	$5,022	$5,511
Service cost	31	38	34
Interest cost	237	211	240
Actuarial loss (gain)	444	-311
Benefits paid	-396	-415
Participants' contributions	0	0
Retiree Medicare drug subsidy	0	0
Settlements	-1	0
Cumulative translation adjustments	-14	-12
Benefit obligation, end of year	5,323	5,022	5,511
Postretirement benefits [Member]
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	589	676
Service cost	0	0	0
Interest cost	25	26	33
Actuarial loss (gain)	5	-51
Benefits paid	-74	-79
Participants' contributions	11	10
Retiree Medicare drug subsidy	6	7
Settlements	0	0
Cumulative translation adjustments	0	0
Benefit obligation, end of year	$562	$589	$676

Pension_and_Other_Postretireme3

Pension and Other Postretirement Benefits (Change In Plan Assets) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Pension benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	$4,184	$4,234
Actual return on plan assets	402	178
Employer contributions	50	199
Benefits paid	-396	-415
Participants' contributions	0	0
Retiree Medicare drug subsidy	0	0
Settlements	-1	0
Cumulative translation adjustments	-15	-12
Fair value of plan assets, end of year	4,224	4,184
Postretirement benefits [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	5	5
Actual return on plan assets	0	0
Employer contributions	57	62
Benefits paid	-74	-79
Participants' contributions	11	10
Retiree Medicare drug subsidy	6	7
Settlements	0	0
Cumulative translation adjustments	0	0
Fair value of plan assets, end of year	$5	$5

Pension_and_Other_Postretireme4

Pension and Other Postretirement Benefits (Funded Status and Amounts Recognized on the Consolidated Balance Sheets) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	$5,200,000,000	$4,890,000,000
Accumulated benefit obligation	5,111,000,000	4,814,000,000
Fair value of plan assets	4,085,000,000	4,036,000,000
Accumulated benefit obligation for all defined benefit pension plans	5,230,000,000	4,950,000,000
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent liabilities	-1,564,000,000	-1,327,000,000
Pension benefits [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Funded status at end of year	-1,099,000,000	-838,000,000
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Other assets	15,000,000	17,000,000
Current liabilities	-50,000,000	-50,000,000
Noncurrent liabilities	-1,064,000,000	-805,000,000
Net amounts recognized	-1,099,000,000	-838,000,000
Amounts recognized in accumulated other comprehensive income (loss) on the Consolidated Balance Sheets
Net actuarial (loss) gain	-1,774,000,000	-1,533,000,000
Net prior service (cost) credit	-10,000,000	-11,000,000
Share of equity investee	-1,000,000	0
Net amount recognized in accumulated other comprehensive income (loss) before tax	-1,785,000,000	-1,544,000,000
Deferred income taxes	706,000,000	612,000,000
Net amount recognized in accumulated other comprehensive income (loss)	-1,079,000,000	-932,000,000
Postretirement benefits [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Funded status at end of year	-557,000,000	-584,000,000
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Other assets	0	0
Current liabilities	-57,000,000	-62,000,000
Noncurrent liabilities	-500,000,000	-522,000,000
Net amounts recognized	-557,000,000	-584,000,000
Amounts recognized in accumulated other comprehensive income (loss) on the Consolidated Balance Sheets
Net actuarial (loss) gain	222,000,000	248,000,000
Net prior service (cost) credit	0	1,000,000
Share of equity investee	0	0
Net amount recognized in accumulated other comprehensive income (loss) before tax	222,000,000	249,000,000
Deferred income taxes	-35,000,000	-46,000,000
Net amount recognized in accumulated other comprehensive income (loss)	187,000,000	203,000,000
Qualified Pension Plans [Member]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Funded status at end of year	($425,000,000)	($203,000,000)

Pension_and_Other_Postretireme5

Pension and Other Postretirement Benefits (Components of Net Periodic Benefit Cost and Amounts Recognized in Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Deferred income taxes	$105	($132)	$80
Pension benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	31	38	34
Interest cost	237	211	240
Expected return on plan assets	-262	-271	-247
Amortization of actuarial losses (gains)	63	85	70
Amortization of prior service cost (credit)	1	1	1
Net periodic cost	70	64	98
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year [Abstract]
Estimated net actuarial (gain) loss that will be amortized into net periodic benefit cost over next fiscal year	78
Estimated net prior service cost (credit) that will be amortized into net periodic benefit cost over the next fiscal year	1
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Actuarial (losses) gains	-304
Amortization of actuarial losses (gains)	63
Amortization of prior service (credit) cost	1
Share of equity investee	-1
Recognized in other comprehensive income, before tax	-241
Deferred income taxes	94
Recognized in other comprehensive income, net of tax	-147
Postretirement benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0	0	0
Interest cost	25	26	33
Expected return on plan assets	0	0	0
Amortization of actuarial losses (gains)	-21	-16	-16
Amortization of prior service cost (credit)	-1	-1	-1
Net periodic cost	3	9	16
Defined Benefit Plan, Amount to be Amortized from Accumulated Other Comprehensive Income (Loss) Next Fiscal Year [Abstract]
Estimated net actuarial (gain) loss that will be amortized into net periodic benefit cost over next fiscal year	-19
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, Net of Tax [Abstract]
Actuarial (losses) gains	-5
Amortization of actuarial losses (gains)	-21
Amortization of prior service (credit) cost	-1
Share of equity investee	0
Recognized in other comprehensive income, before tax	-27
Deferred income taxes	11
Recognized in other comprehensive income, net of tax	($16)

Pension_and_Other_Postretireme6

Pension and Other Postretirement Benefits (Assumptions) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Postretirement benefit plans assumed health care cost trend rates [Line Items]
Ultimate trend rate	5.00%	5.00%
Participants Age 65 And Below [Member]
Postretirement benefit plans assumed health care cost trend rates [Line Items]
Projected health care cost trend rate for participants	7.00%	7.50%
Year ultimate trend rate is achieved for participants	2019	2019
Participants Above Age 65 [Member]
Postretirement benefit plans assumed health care cost trend rates [Line Items]
Projected health care cost trend rate for participants	7.00%	7.50%
Year ultimate trend rate is achieved for participants	2019	2019
Pension benefits [Member]
Weighted average assumptions used to determine benefit obligations at December 31:
Discount rate	4.10%	4.90%
Rate of compensation increase	3.00%	3.00%
Weighted average assumptions used to determine net periodic costs for the year ended December 31:
Discount rate	4.90%	4.00%
Expected long-term return on plan assets	6.50%	6.50%
Rate of compensation increase	3.00%	3.00%
Postretirement benefits [Member]
Weighted average assumptions used to determine benefit obligations at December 31:
Discount rate	3.80%	4.50%
Weighted average assumptions used to determine net periodic costs for the year ended December 31:
Discount rate	4.50%	4.00%
Expected long-term return on plan assets	2.00%	2.00%

Pension_and_Other_Postretireme7

Pension and Other Postretirement Benefits (Sensitivity) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Defined Benefit Plan, Effect of One-Percentage Point Change in Assumed Health Care Cost Trend Rates [Abstract]
Effect of one percentage point increase on total service and interest cost components	$0
Effect of one percentage point decrease on total service and interest cost components	0
Effect of one percentage point increase in accumulated postretirement benefit obligation	9
Effect of one percentage point decrease on the accumulated postretirement benefit obligation	($9)

Pension_and_Other_Postretireme8

Pension and Other Postretirement Benefits (Plan Asset Allocations) (Details)	12 Months Ended
	Dec. 31, 2014
US Pension Pan Trust [Member]
Target plan asset allocation [Abstract]
Defined benefit plan, actual plan asset allocation	95.00%
International Pension Plan [Member]
Target plan asset allocation [Abstract]
Defined benefit plan, actual plan asset allocation	5.00%
Fixed Income Instrument [Member] | US Pension Pan Trust [Member]
Target plan asset allocation [Abstract]
Defined benefit plan, target plan asset allocations range minimum	70.00%
Defined benefit plan, target plan asset allocations range maximum	80.00%
Defined benefit plan, actual plan asset allocation	76.00%
Fixed Income Instrument [Member] | International Pension Plan [Member]
Target plan asset allocation [Abstract]
Defined benefit plan, actual plan asset allocation	74.00%
Equity securities [Member] | US Pension Pan Trust [Member]
Target plan asset allocation [Abstract]
Defined benefit plan, target plan asset allocations range minimum	16.00%
Defined benefit plan, target plan asset allocations range maximum	28.00%
Defined benefit plan, actual plan asset allocation	22.00%
Equity securities [Member] | International Pension Plan [Member]
Target plan asset allocation [Abstract]
Defined benefit plan, actual plan asset allocation	20.00%

Pension_and_Other_Postretireme9

Pension and Other Postretirement Benefits (Fair Value Measurements) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$4,224	$4,184	$4,234
Postretirement benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5	5	5
Cash and cash equivalents [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	48	63
Fixed income securities [Member] | Postretirement benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5	5
Fixed income securities [Member] | US treasury securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	139	133
Fixed income securities [Member] | Government-related securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	350	278
Fixed income securities [Member] | Corporate bonds [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,560	2,373
Fixed income securities [Member] | Mortgage-backed and asset-backed securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	119	132
Equity securities [Member] | US large capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	607	700
Equity securities [Member] | US small capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	76	101
Equity securities [Member] | International equity [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	242	291
Limited partnerships [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	56	55
Other investments [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	58
Level 1 [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	525	628
Level 1 [Member] | Cash and cash equivalents [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	5	8
Level 1 [Member] | Fixed income securities [Member] | US treasury securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	139	133
Level 1 [Member] | Fixed income securities [Member] | Government-related securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	49	44
Level 1 [Member] | Fixed income securities [Member] | Corporate bonds [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Fixed income securities [Member] | Mortgage-backed and asset-backed securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Equity securities [Member] | US large capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	258	345
Level 1 [Member] | Equity securities [Member] | US small capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	74	98
Level 1 [Member] | Equity securities [Member] | International equity [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Limited partnerships [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 1 [Member] | Other investments [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3,640	3,497
Level 2 [Member] | Cash and cash equivalents [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	43	55
Level 2 [Member] | Fixed income securities [Member] | US treasury securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 [Member] | Fixed income securities [Member] | Government-related securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	301	234
Level 2 [Member] | Fixed income securities [Member] | Corporate bonds [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2,560	2,373
Level 2 [Member] | Fixed income securities [Member] | Mortgage-backed and asset-backed securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116	128
Level 2 [Member] | Equity securities [Member] | US large capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	349	355
Level 2 [Member] | Equity securities [Member] | US small capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	3
Level 2 [Member] | Equity securities [Member] | International equity [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	242	291
Level 2 [Member] | Equity securities [Member] | International equity [Member] | Emerging Markets Investments [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	50	59
Level 2 [Member] | Limited partnerships [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 2 [Member] | Other investments [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	27	58
Level 3 [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	59	59	56
Level 3 [Member] | Cash and cash equivalents [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Fixed income securities [Member] | US treasury securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Fixed income securities [Member] | Government-related securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Fixed income securities [Member] | Corporate bonds [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Fixed income securities [Member] | Mortgage-backed and asset-backed securities [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	4
Level 3 [Member] | Equity securities [Member] | US large capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Equity securities [Member] | US small capitalization [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Equity securities [Member] | International equity [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	0	0
Level 3 [Member] | Limited partnerships [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	56	55
Level 3 [Member] | Other investments [Member] | Pension benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$0	$0

Recovered_Sheet1

Pension and Other Postretirement Benefits (Fair Value Measurements Level 3 Rollforward) (Details) (Pension benefits [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets, beginning of year			$4,234
Fair value of plan assets, end of year	4,224	4,184	4,234
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets, beginning of year	59	56
Actual return related to investments held at end of year	1	4
Distributions	-1	-1
Fair value of plan assets, end of year	59	59
Limited partnerships [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets, beginning of year	55	52
Actual return related to investments held at end of year	1	4
Distributions	0	-1
Fair value of plan assets, end of year	56	55
Mortgage-backed and asset-backed securities [Member] | Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of plan assets, beginning of year	4	4
Actual return related to investments held at end of year	0	0
Distributions	-1	0
Fair value of plan assets, end of year	$3	$4

Recovered_Sheet2

Pension and Other Postretirement Benefits (Future Benefit Payments and Contributions) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Nov. 30, 2013	Dec. 31, 2012
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Contributions to defined contribution plans	$49	$53		$49
Retiree Medicare drug subsidy future benefit payment by year [Abstract]
2015	9
2016	9
2017	8
2018	8
2019	8
2020-2024	36
Multiemployer Plans [Line Items]
Contributions to multiemployer plans	47	42		38
AFTRA Retirement Plan [Member]
Multiemployer Plans [Line Items]
Entity tax identification number	136414972
Pension plan number	1
Pension Protection Act zone status	Green
Contributions to multiemployer plans	7	7		7
Multiemployer Plan for which the company contributed more than 5% of total contributions			TRUE
AFTRA Retirement Plan [Member] | Minimum [Member]
Multiemployer Plans [Line Items]
Expiration date of collective bargaining agreement	30-Jun-17
AFTRA Retirement Plan [Member] | Maximum [Member]
Multiemployer Plans [Line Items]
Expiration date of collective bargaining agreement	15-Nov-17
Directors Guild Of America Producer [Member]
Multiemployer Plans [Line Items]
Entity tax identification number	952892780
Pension plan number	1
Pension Protection Act zone status	Green
Contributions to multiemployer plans	5	5		4
Expiration date of collective bargaining agreement	30-Jun-17
Producer Writers Guild Of America [Member]
Multiemployer Plans [Line Items]
Entity tax identification number	952216351
Pension plan number	1
Pension Protection Act zone status	Green
Contributions to multiemployer plans	10	8		8
Expiration date of collective bargaining agreement	1-May-17
Screen Actors Guild Producers [Member]
Multiemployer Plans [Line Items]
Entity tax identification number	952110997
Pension plan number	1
Pension Protection Act zone status	Green
Contributions to multiemployer plans	7	7		6
Expiration date of collective bargaining agreement	30-Jun-17
Motion Picture Industry [Member]
Multiemployer Plans [Line Items]
Entity tax identification number	951810805
Pension plan number	1
Contributions to multiemployer plans	8	7		7
Motion Picture Industry [Member] | Minimum [Member]
Multiemployer Plans [Line Items]
Expiration date of collective bargaining agreement	2-Mar-15
Motion Picture Industry [Member] | Maximum [Member]
Multiemployer Plans [Line Items]
Expiration date of collective bargaining agreement	2-Mar-16
Multiemployer Plan, Individually Insignificant Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Contributions to multiemployer plans	10	8		6
Health And Welfare Multiemployer Plans [Member]
Multiemployer Plans [Line Items]
Contributions to multiemployer plans	20	17		18
Pension benefits [Member]
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Fair value of plan assets	4,224	4,184		4,234
Expected future benefit payments, by year [Abstract]
2015	398
2016	388
2017	381
2018	372
2019	364
2020-2024	1,691
Pension benefits [Member] | Nonqualified Pension Plans [Member]
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Expected contribution in the next fiscal year	50
Postretirement benefits [Member]
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Fair value of plan assets	5	5		5
Expected future benefit payments, by year [Abstract]
2015	67
2016	65
2017	62
2018	59
2019	57
2020-2024	236
Defined Benefit Plan, Estimated Future Employer Contributions [Abstract]
Expected contribution in the next fiscal year	$58

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Commitments [Line Items]
Programming and talent commitments, payments due 2015	$2,429
Programming and talent commitments, payments due 2016	2,094
Programming and talent commitments, payments due 2017	1,743
Programming and talent commitments, payments due 2018	1,563
Programming and talent commitments, payments due 2019	1,577
Programming and talent commitments, payments due 2020 and thereafter	4,317
Programming and talent commitments, total future minimum payments	13,723
Unrecorded purchase obligations paydown by year [Abstract]
Purchase obligations, payments due 2015	183
Purchase obligations, payments due 2016	159
Purchase obligations, payments due 2017	129
Purchase obligations, payments due 2018	109
Purchase obligations, payments due 2019	98
Purchase obligations, payments due 2020 and thereafter	158
Purchase obligations, total future minimum payments	836
Recorded purchase obligations paydown by year [Abstract]
Other long-term contractual obligations, payments due 2015	0
Other long-term contractual obligations, payments due 2016	726
Other long-term contractual obligations, payments due 2017	318
Other long-term contractual obligations, payments due 2018	127
Other long-term contractual obligations, payments due 2019	82
Other long-term contractual obligations, payments due 2020 and thereafter	69
Other long-term contractual obligations, total future minimum payments	1,322
Capital lease obligations paydown by year [Abstract]
Capital leases, payments due 2015	20
Capital leases, payments due 2016	19
Capital leases, payments due 2017	15
Capital leases, payments due 2018	15
Capital leases, payments due 2019	14
Capital leases, payments due 2020 and thereafter	30
Capital leases, total future minimum payments	113
Capital leases, less amounts representing interest	16
Capital Leases, present value of net minimum payments	97
Operating lease obligation paydown by year [Abstract]
Operating leases, payments due 2015	177
Operating leases, payments due 2016	147
Operating leases, payments due 2017	134
Operating leases, payments due 2018	116
Operating leases, payments due 2019	100
Operating leases, payments due 2020 and thereafter	440
Operating leases, total future minimum payments	1,114
Future minimum sublease income	64
Exposure under guarantee	187
Carrying value of guarantees	28	40
Outstanding letters of credit and surety bonds	242
Loss Contingencies [Line Items]
Cost for settlement and defense of asbestos claims, net of insurance recoveries and tax benefits	11	29
Asbestos Claims [Member]
Loss Contingencies [Line Items]
Number of pending asbestos claims	41,100	45,150	45,900
Number of new asbestos claims	3,880
Number of asbestos claims closed or moved to inactive docket	7,930
Continuing Operations [Member]
Other Commitments [Line Items]
Rent expense	206	211	204
Discontinued Operations [Member]
Other Commitments [Line Items]
Rent expense	158	292	283
Sports programming rights commitments [Member]
Other Commitments [Line Items]
Programming and talent commitments, total future minimum payments	10,230
Production and licensing of television, radio and film programming [Member]
Other Commitments [Line Items]
Programming and talent commitments, total future minimum payments	2,700
Talent contracts [Member]
Other Commitments [Line Items]
Programming and talent commitments, total future minimum payments	$797

Reportable_Segments_Details

Reportable Segments (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting [Abstract]
Interest expense									($363,000,000)	($375,000,000)	($401,000,000)
Interest income									13,000,000	8,000,000	5,000,000
Net loss on early extinguishment of debt (Note 9)									-352,000,000	0	-32,000,000
Other items, net									-30,000,000	7,000,000	7,000,000
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies									2,164,000,000	2,665,000,000	2,357,000,000
(Provision) benefit for income taxes									-762,000,000	-878,000,000	-812,000,000
Equity in loss of investee companies, net of tax									-48,000,000	-49,000,000	-37,000,000
Net earnings (loss) from continuing operations	402,000,000	72,000,000	418,000,000	462,000,000	422,000,000	431,000,000	435,000,000	450,000,000	1,354,000,000	1,738,000,000	1,508,000,000
Net earnings from discontinued operations, net of tax (Note 4)									1,605,000,000	141,000,000	66,000,000
Net earnings (loss)	413,000,000	1,639,000,000	439,000,000	468,000,000	470,000,000	494,000,000	472,000,000	443,000,000	2,959,000,000	1,879,000,000	1,574,000,000
Segment Reporting Information [Line Items]
Revenues	-3,681,000,000	-3,367,000,000	-3,188,000,000	-3,570,000,000	-3,571,000,000	-3,302,000,000	-3,369,000,000	-3,763,000,000	-13,806,000,000	-14,005,000,000	-12,820,000,000
Segment OIBDA	778,000,000	814,000,000	801,000,000	862,000,000	808,000,000	834,000,000	848,000,000	845,000,000	3,255,000,000	3,335,000,000	3,114,000,000
Operating income (loss)	707,000,000	668,000,000	730,000,000	791,000,000	715,000,000	764,000,000	775,000,000	771,000,000	2,896,000,000	3,025,000,000	2,778,000,000
Restructuring charges									-26,000,000	-20,000,000	-19,000,000
Impairment charges									52,000,000	0	11,000,000
Depreciation and amortization									281,000,000	290,000,000	306,000,000
Stock-based compensation									154,000,000	222,000,000	147,000,000
Capital expenditures									206,000,000	212,000,000	200,000,000
Total assets	24,072,000,000				26,387,000,000				24,072,000,000	26,387,000,000
Long-Lived Assets	18,209,000,000				20,702,000,000				18,209,000,000	20,702,000,000
Revenues by Type [Abstract]
Advertising									7,204,000,000	7,525,000,000	7,191,000,000
Content licensing and distribution									3,990,000,000	3,997,000,000	3,468,000,000
Affiliate and subscription fees									2,362,000,000	2,221,000,000	1,921,000,000
Other revenues									250,000,000	262,000,000	240,000,000
United States [Member]
Segment Reporting Information [Line Items]
Revenues									-12,013,000,000	-12,178,000,000	-11,275,000,000
Long-Lived Assets	17,881,000,000				20,169,000,000				17,881,000,000	20,169,000,000
International [Member]
Segment Reporting Information [Line Items]
Revenues									-1,793,000,000	-1,827,000,000	-1,545,000,000
Long-Lived Assets	328,000,000				533,000,000				328,000,000	533,000,000
Operating segments [Member] | Entertainment Segment [Member]
Segment Reporting Information [Line Items]
Revenues	-2,260,000,000	-1,911,000,000	-1,835,000,000	-2,303,000,000	-2,214,000,000	-1,884,000,000	-2,008,000,000	-2,539,000,000	-8,309,000,000	-8,645,000,000	-7,694,000,000
Segment OIBDA	287,000,000	335,000,000	376,000,000	457,000,000	418,000,000	431,000,000	429,000,000	480,000,000	1,455,000,000	1,758,000,000	1,549,000,000
Operating income (loss)	253,000,000	294,000,000	341,000,000	420,000,000	368,000,000	394,000,000	391,000,000	440,000,000	1,308,000,000	1,593,000,000	1,381,000,000
Restructuring charges									-8,000,000	-12,000,000
Depreciation and amortization									139,000,000	153,000,000	161,000,000
Stock-based compensation									56,000,000	56,000,000	49,000,000
Capital expenditures									94,000,000	101,000,000	92,000,000
Total assets	10,469,000,000				9,657,000,000				10,469,000,000	9,657,000,000
Operating segments [Member] | Cable Networks Segment [Member]
Segment Reporting Information [Line Items]
Revenues	-499,000,000	-624,000,000	-516,000,000	-537,000,000	-477,000,000	-596,000,000	-518,000,000	-478,000,000	-2,176,000,000	-2,069,000,000	-1,772,000,000
Segment OIBDA	247,000,000	272,000,000	219,000,000	259,000,000	199,000,000	261,000,000	207,000,000	231,000,000	997,000,000	898,000,000	811,000,000
Operating income (loss)	241,000,000	266,000,000	213,000,000	254,000,000	193,000,000	255,000,000	202,000,000	227,000,000	974,000,000	877,000,000	785,000,000
Restructuring charges									0	-1,000,000
Depreciation and amortization									23,000,000	20,000,000	26,000,000
Stock-based compensation									9,000,000	8,000,000	6,000,000
Capital expenditures									16,000,000	16,000,000	18,000,000
Total assets	2,113,000,000				1,968,000,000				2,113,000,000	1,968,000,000
Operating segments [Member] | Publishing Segment [Member]
Segment Reporting Information [Line Items]
Revenues	-215,000,000	-199,000,000	-211,000,000	-153,000,000	-225,000,000	-224,000,000	-189,000,000	-171,000,000	-778,000,000	-809,000,000	-790,000,000
Segment OIBDA	27,000,000	43,000,000	24,000,000	13,000,000	37,000,000	43,000,000	21,000,000	12,000,000	107,000,000	113,000,000	89,000,000
Operating income (loss)	25,000,000	41,000,000	23,000,000	11,000,000	35,000,000	41,000,000	20,000,000	10,000,000	100,000,000	106,000,000	80,000,000
Restructuring charges									-1,000,000	-1,000,000
Depreciation and amortization									6,000,000	6,000,000	6,000,000
Stock-based compensation									4,000,000	4,000,000	3,000,000
Capital expenditures									4,000,000	4,000,000	5,000,000
Total assets	990,000,000				1,026,000,000				990,000,000	1,026,000,000
Operating segments [Member] | Local Broadcasting Segment [Member]
Segment Reporting Information [Line Items]
Revenues	-785,000,000	-680,000,000	-665,000,000	-626,000,000	-719,000,000	-641,000,000	-698,000,000	-638,000,000	-2,756,000,000	-2,696,000,000	-2,774,000,000
Segment OIBDA	313,000,000	214,000,000	238,000,000	200,000,000	263,000,000	181,000,000	255,000,000	199,000,000	965,000,000	898,000,000	957,000,000
Operating income (loss)	292,000,000	126,000,000	215,000,000	179,000,000	236,000,000	161,000,000	234,000,000	176,000,000	812,000,000	807,000,000	848,000,000
Restructuring charges									-14,000,000	-5,000,000
Depreciation and amortization									87,000,000	86,000,000	90,000,000
Stock-based compensation									28,000,000	27,000,000	24,000,000
Capital expenditures									65,000,000	64,000,000	64,000,000
Total assets	9,585,000,000				9,600,000,000				9,585,000,000	9,600,000,000
Corporate [Member]
Segment Reporting Information [Line Items]
Segment OIBDA	-96,000,000	-50,000,000	-56,000,000	-67,000,000	-109,000,000	-82,000,000	-64,000,000	-77,000,000	-269,000,000	-332,000,000	-292,000,000
Operating income (loss)	-104,000,000	-59,000,000	-62,000,000	-73,000,000	-117,000,000	-87,000,000	-72,000,000	-82,000,000	-298,000,000	-358,000,000	-316,000,000
Restructuring charges									-3,000,000	-1,000,000
Depreciation and amortization									26,000,000	25,000,000	23,000,000
Stock-based compensation									57,000,000	127,000,000	65,000,000
Capital expenditures									27,000,000	27,000,000	21,000,000
Total assets	876,000,000				661,000,000				876,000,000	661,000,000
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	78,000,000	47,000,000	39,000,000	49,000,000	64,000,000	43,000,000	44,000,000	63,000,000	213,000,000	214,000,000	210,000,000
Intersegment eliminations [Member]
Segment Reporting Information [Line Items]
Revenues									225,000,000	225,000,000	222,000,000
Intersegment eliminations [Member] | Entertainment Segment [Member]
Segment Reporting Information [Line Items]
Revenues									206,000,000	208,000,000	203,000,000
Intersegment eliminations [Member] | Cable Networks Segment [Member]
Segment Reporting Information [Line Items]
Revenues									1,000,000	0	0
Intersegment eliminations [Member] | Local Broadcasting Segment [Member]
Segment Reporting Information [Line Items]
Revenues									18,000,000	17,000,000	19,000,000
Discontinued Operations [Member]
Segment Reporting Information [Line Items]
Total assets	39,000,000				3,475,000,000				39,000,000	3,475,000,000
Segment reconciling items [Member]
Segment Reporting Information [Line Items]
Restructuring charges	0	-26,000,000	0	0	-20,000,000	0	0	0	-26,000,000	-20,000,000	-19,000,000
Impairment charges	0	52,000,000	0	0					52,000,000	0	11,000,000
Depreciation and amortization	$71,000,000	$68,000,000	$71,000,000	$71,000,000	$73,000,000	$70,000,000	$73,000,000	$74,000,000	$281,000,000	$290,000,000	$306,000,000

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Supplemental Cash Flow Information [Line Items]
Cash paid for interest	$707,000,000	$360,000,000	$440,000,000
Cash paid for income taxes	259,000,000	386,000,000	406,000,000
Payment associated with early extinguishment of debt mainly for early redemption premiums	360,000,000		60,000,000
Non-cash investing and financing activities:
Shares received in Split-Off	2,721,000,000	0	0
Equipment acquired under capitalized leases	1,000,000	58,000,000	13,000,000
Radio station swap (Note 3)	262,000,000	0	0
Contingent consideration associated with acquisitions	0	0	4,000,000
Continuing Operations [Member]
Supplemental Cash Flow Information [Line Items]
Cash paid for income taxes	217,000,000	294,000,000	331,000,000
Discontinued Operations [Member]
Supplemental Cash Flow Information [Line Items]
Cash paid for income taxes	$42,000,000	$92,000,000	$75,000,000

Quarterly_Financial_Data_unaud2

Quarterly Financial Data (unaudited) (Details) (USD $)	3 Months Ended								12 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Revenues	$3,681,000,000	$3,367,000,000	$3,188,000,000	$3,570,000,000	$3,571,000,000	$3,302,000,000	$3,369,000,000	$3,763,000,000	$13,806,000,000	$14,005,000,000	$12,820,000,000
Segment OIBDA	778,000,000	814,000,000	801,000,000	862,000,000	808,000,000	834,000,000	848,000,000	845,000,000	3,255,000,000	3,335,000,000	3,114,000,000
Operating income (loss)	707,000,000	668,000,000	730,000,000	791,000,000	715,000,000	764,000,000	775,000,000	771,000,000	2,896,000,000	3,025,000,000	2,778,000,000
Restructuring charges									-26,000,000	-20,000,000	-19,000,000
Impairment charge									-52,000,000	0	-11,000,000
Depreciation and amortization									-281,000,000	-290,000,000	-306,000,000
Net earnings (loss) from continuing operations	402,000,000	72,000,000	418,000,000	462,000,000	422,000,000	431,000,000	435,000,000	450,000,000	1,354,000,000	1,738,000,000	1,508,000,000
Net earnings (loss)	413,000,000	1,639,000,000	439,000,000	468,000,000	470,000,000	494,000,000	472,000,000	443,000,000	2,959,000,000	1,879,000,000	1,574,000,000
Basic net earnings (loss) per common share:
Basic net earnings from continuing operation (in dollars per share)	$0.78	$0.14	$0.73	$0.79	$0.70	$0.71	$0.71	$0.72	$2.46	$2.86	$2.35
Basic net earnings (in dollars per share)	$0.80	$3.08	$0.77	$0.80	$0.78	$0.82	$0.78	$0.71	$5.38	$3.09	$2.45
Diluted net earnings (loss) per common share:
Diluted net earnings from continuing operations (in dollars per share)	$0.77	$0.13	$0.72	$0.77	$0.69	$0.70	$0.70	$0.71	$2.41	$2.79	$2.29
Diluted net earnings (in dollars per share)	$0.79	$3.03	$0.76	$0.78	$0.76	$0.80	$0.76	$0.69	$5.27	$3.01	$2.39
Weighted average number of shares outstanding [Abstract]
Basic weighted average number of common shares outstanding	515	532	570	585	599	603	609	621	550	608	642
Diluted weighted average number of common shares outstanding	523	541	581	600	615	618	624	638	561	624	659
Dividends per common share (in dollars per share)	$0.15	$0.15	$0.12	$0.12	$0.12	$0.12	$0.12	$0.12	$0.54	$0.48	$0.44
Operating segments [Member] | Entertainment Segment [Member]
Segment Reporting Information [Line Items]
Revenues	2,260,000,000	1,911,000,000	1,835,000,000	2,303,000,000	2,214,000,000	1,884,000,000	2,008,000,000	2,539,000,000	8,309,000,000	8,645,000,000	7,694,000,000
Segment OIBDA	287,000,000	335,000,000	376,000,000	457,000,000	418,000,000	431,000,000	429,000,000	480,000,000	1,455,000,000	1,758,000,000	1,549,000,000
Operating income (loss)	253,000,000	294,000,000	341,000,000	420,000,000	368,000,000	394,000,000	391,000,000	440,000,000	1,308,000,000	1,593,000,000	1,381,000,000
Restructuring charges									-8,000,000	-12,000,000
Depreciation and amortization									-139,000,000	-153,000,000	-161,000,000
Operating segments [Member] | Cable Networks Segment [Member]
Segment Reporting Information [Line Items]
Revenues	499,000,000	624,000,000	516,000,000	537,000,000	477,000,000	596,000,000	518,000,000	478,000,000	2,176,000,000	2,069,000,000	1,772,000,000
Segment OIBDA	247,000,000	272,000,000	219,000,000	259,000,000	199,000,000	261,000,000	207,000,000	231,000,000	997,000,000	898,000,000	811,000,000
Operating income (loss)	241,000,000	266,000,000	213,000,000	254,000,000	193,000,000	255,000,000	202,000,000	227,000,000	974,000,000	877,000,000	785,000,000
Restructuring charges									0	-1,000,000
Depreciation and amortization									-23,000,000	-20,000,000	-26,000,000
Operating segments [Member] | Publishing Segment [Member]
Segment Reporting Information [Line Items]
Revenues	215,000,000	199,000,000	211,000,000	153,000,000	225,000,000	224,000,000	189,000,000	171,000,000	778,000,000	809,000,000	790,000,000
Segment OIBDA	27,000,000	43,000,000	24,000,000	13,000,000	37,000,000	43,000,000	21,000,000	12,000,000	107,000,000	113,000,000	89,000,000
Operating income (loss)	25,000,000	41,000,000	23,000,000	11,000,000	35,000,000	41,000,000	20,000,000	10,000,000	100,000,000	106,000,000	80,000,000
Restructuring charges									-1,000,000	-1,000,000
Depreciation and amortization									-6,000,000	-6,000,000	-6,000,000
Operating segments [Member] | Local Broadcasting Segment [Member]
Segment Reporting Information [Line Items]
Revenues	785,000,000	680,000,000	665,000,000	626,000,000	719,000,000	641,000,000	698,000,000	638,000,000	2,756,000,000	2,696,000,000	2,774,000,000
Segment OIBDA	313,000,000	214,000,000	238,000,000	200,000,000	263,000,000	181,000,000	255,000,000	199,000,000	965,000,000	898,000,000	957,000,000
Operating income (loss)	292,000,000	126,000,000	215,000,000	179,000,000	236,000,000	161,000,000	234,000,000	176,000,000	812,000,000	807,000,000	848,000,000
Restructuring charges									-14,000,000	-5,000,000
Depreciation and amortization									-87,000,000	-86,000,000	-90,000,000
Corporate [Member]
Segment Reporting Information [Line Items]
Segment OIBDA	-96,000,000	-50,000,000	-56,000,000	-67,000,000	-109,000,000	-82,000,000	-64,000,000	-77,000,000	-269,000,000	-332,000,000	-292,000,000
Operating income (loss)	-104,000,000	-59,000,000	-62,000,000	-73,000,000	-117,000,000	-87,000,000	-72,000,000	-82,000,000	-298,000,000	-358,000,000	-316,000,000
Restructuring charges									-3,000,000	-1,000,000
Depreciation and amortization									-26,000,000	-25,000,000	-23,000,000
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	-78,000,000	-47,000,000	-39,000,000	-49,000,000	-64,000,000	-43,000,000	-44,000,000	-63,000,000	-213,000,000	-214,000,000	-210,000,000
Segment reconciling items [Member]
Segment Reporting Information [Line Items]
Restructuring charges	0	-26,000,000	0	0	-20,000,000	0	0	0	-26,000,000	-20,000,000	-19,000,000
Impairment charge	0	-52,000,000	0	0					-52,000,000	0	-11,000,000
Depreciation and amortization	($71,000,000)	($68,000,000)	($71,000,000)	($71,000,000)	($73,000,000)	($70,000,000)	($73,000,000)	($74,000,000)	($281,000,000)	($290,000,000)	($306,000,000)

Condensed_Consolidating_Financ2

Condensed Consolidating Financials (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Condensed Consolidating Statement of Operations [Abstract]
Revenues	$3,681,000,000	$3,367,000,000	$3,188,000,000	$3,570,000,000	$3,571,000,000	$3,302,000,000	$3,369,000,000	$3,763,000,000	$13,806,000,000	$14,005,000,000	$12,820,000,000
Costs and Expenses [Abstract]
Operating									8,089,000,000	8,124,000,000	7,264,000,000
Selling, general and administrative									2,462,000,000	2,546,000,000	2,442,000,000
Restructuring charges									26,000,000	20,000,000	19,000,000
Impairment charges									52,000,000	0	11,000,000
Depreciation and amortization									281,000,000	290,000,000	306,000,000
Total expenses									10,910,000,000	10,980,000,000	10,042,000,000
Operating income (loss)	707,000,000	668,000,000	730,000,000	791,000,000	715,000,000	764,000,000	775,000,000	771,000,000	2,896,000,000	3,025,000,000	2,778,000,000
Interest (expense) income, net									-350,000,000	-367,000,000	-396,000,000
Net loss on early extinguishment of debt (Note 9)									-352,000,000	0	-32,000,000
Other items, net									-30,000,000	7,000,000	7,000,000
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies									2,164,000,000	2,665,000,000	2,357,000,000
(Provision) benefit for income taxes									-762,000,000	-878,000,000	-812,000,000
Equity in earnings (loss) of investee companies, net of tax									-48,000,000	-49,000,000	-37,000,000
Net earnings (loss) from continuing operations	402,000,000	72,000,000	418,000,000	462,000,000	422,000,000	431,000,000	435,000,000	450,000,000	1,354,000,000	1,738,000,000	1,508,000,000
Net earnings from discontinued operations, net of tax (Note 4)									1,605,000,000	141,000,000	66,000,000
Net earnings (loss)	413,000,000	1,639,000,000	439,000,000	468,000,000	470,000,000	494,000,000	472,000,000	443,000,000	2,959,000,000	1,879,000,000	1,574,000,000
Total comprehensive income									2,769,000,000	1,903,000,000	1,444,000,000
Assets [Abstract]
Cash and cash equivalents	428,000,000				368,000,000				428,000,000	368,000,000
Receivables, net	3,459,000,000				3,234,000,000				3,459,000,000	3,234,000,000
Programming and other inventory (Note 6)	922,000,000				772,000,000				922,000,000	772,000,000
Prepaid expense and other current assets	780,000,000				645,000,000				780,000,000	645,000,000
Current assets of discontinued operations (Note 4)	0				351,000,000				0	351,000,000
Total current assets	5,589,000,000				5,370,000,000				5,589,000,000	5,370,000,000
Property and equipment	3,164,000,000				3,060,000,000				3,164,000,000	3,060,000,000
Less accumulated depreciation and amortization	1,731,000,000				1,599,000,000				1,731,000,000	1,599,000,000
Net property and equipment (Note 2)	1,433,000,000				1,461,000,000				1,433,000,000	1,461,000,000
Programming and other inventory (Note 6)	1,817,000,000				1,697,000,000				1,817,000,000	1,697,000,000
Goodwill (Note 3)	6,698,000,000				6,588,000,000				6,698,000,000	6,588,000,000	6,582,000,000
Intangible assets (Note 3)	6,008,000,000				5,870,000,000				6,008,000,000	5,870,000,000
Investments in subsidiaries	0				0				0	0
Other assets	2,488,000,000				1,963,000,000				2,488,000,000	1,963,000,000
Assets held for sale	0				314,000,000				0	314,000,000
Intercompany	0				0				0	0
Assets of discontinued operations	39,000,000				3,124,000,000				39,000,000	3,124,000,000
Total assets	24,072,000,000				26,387,000,000				24,072,000,000	26,387,000,000
Liabilities and Equity [Abstract]
Accounts payable	302,000,000				286,000,000				302,000,000	286,000,000
Participants' share and royalties payable	999,000,000				1,008,000,000				999,000,000	1,008,000,000
Program rights	404,000,000				398,000,000				404,000,000	398,000,000
Commercial paper (Note 9)	616,000,000				475,000,000				616,000,000	475,000,000
Current portion of long-term debt (Note 9)	20,000,000				20,000,000				20,000,000	20,000,000
Accrued expenses and other current liabilities	1,666,000,000				1,766,000,000				1,666,000,000	1,766,000,000
Current liabilities of discontinued operations (Note 4)	26,000,000				254,000,000				26,000,000	254,000,000
Total current liabilities	4,033,000,000				4,207,000,000				4,033,000,000	4,207,000,000
Long-term debt (Note 9)	6,510,000,000				5,940,000,000				6,510,000,000	5,940,000,000
Other liabilities	6,441,000,000				5,797,000,000				6,441,000,000	5,797,000,000
Liabilities of discontinued operations (Note 4)	118,000,000				477,000,000				118,000,000	477,000,000
Intercompany	0				0				0	0
Stockholders' Equity
Preferred stock	0				0				0	0
Common stock	1,000,000				1,000,000				1,000,000	1,000,000
Additional paid-in capital	44,041,000,000				43,474,000,000				44,041,000,000	43,474,000,000
Retained earnings (deficit)	-21,931,000,000				-24,890,000,000				-21,931,000,000	-24,890,000,000
Accumulated other comprehensive loss (Note 1)	-735,000,000				-545,000,000				-735,000,000	-545,000,000	-569,000,000	-439,000,000
Stockholder' equity including treasury stock	21,376,000,000				18,040,000,000				21,376,000,000	18,040,000,000
Less treasury stock, at cost	14,406,000,000				8,074,000,000				14,406,000,000	8,074,000,000
Total Stockholders' Equity	6,970,000,000				9,966,000,000				6,970,000,000	9,966,000,000	10,213,000,000
Total Liabilities and Stockholders' Equity	24,072,000,000				26,387,000,000				24,072,000,000	26,387,000,000
Condensed Consolidating Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities									1,275,000,000	1,873,000,000	1,815,000,000
Investing Activities:
Acquisitions, net of cash acquired									-27,000,000	-20,000,000	-146,000,000
Capital expenditures									-206,000,000	-212,000,000	-200,000,000
Investments in and advances to investee companies									-98,000,000	-176,000,000	-91,000,000
Proceeds from sale of investments									12,000,000	30,000,000	13,000,000
Proceeds from dispositions									7,000,000	164,000,000	49,000,000
Other investing activities									-4,000,000	0	0
Net cash flow provided by (used for) investing activities from continuing operations									-316,000,000	-214,000,000	-375,000,000
Net cash flow provided by (used for) investing activities from discontinued operations									-285,000,000	-58,000,000	-76,000,000
Net cash flow provided by (used for) investing activities									-601,000,000	-272,000,000	-451,000,000
Financing Activities:
Proceeds from short-term debt borrowings, net									141,000,000	475,000,000	0
Proceeds from issuance of notes									1,728,000,000	0	1,566,000,000
Repayment of notes and debentures									-1,152,000,000	0	-1,583,000,000
Payment of capital lease obligations									-17,000,000	-17,000,000	-19,000,000
Payment of contingent consideration									0	-30,000,000	-33,000,000
Dividends									-292,000,000	-300,000,000	-276,000,000
Purchase of Company common stock									-3,595,000,000	-2,185,000,000	-1,137,000,000
Payment of payroll taxes in lieu of issuing shares for stock-based compensation									-146,000,000	-145,000,000	-105,000,000
Proceeds from exercise of stock options									283,000,000	146,000,000	168,000,000
Excess tax benefit from stock-based compensation									243,000,000	148,000,000	103,000,000
Other financing activities									-3,000,000	-4,000,000	0
Increase (decrease) in intercompany payables									0	0	0
Net cash flow provided by (used for) financing activities from continuing operations									-2,810,000,000	-1,912,000,000	-1,316,000,000
Net cash flow provided by financing activities from discontinued operations									2,167,000,000	0	0
Net cash flow provided by (used for) financing activities									-643,000,000	-1,912,000,000	-1,316,000,000
Net increase (decrease) in cash and cash equivalents									31,000,000	-311,000,000	48,000,000
Cash and cash equivalents, including discontinued operations, at beginning of period				397,000,000				708,000,000	397,000,000	708,000,000	660,000,000
Cash and cash equivalents, including discontinued operations, at end of period	428,000,000				397,000,000				428,000,000	397,000,000	708,000,000
Cash and cash equivalents of discontinued operations					29,000,000					29,000,000	21,000,000	38,000,000
Eliminations [Member]
Condensed Consolidating Statement of Operations [Abstract]
Revenues									0	0	0
Costs and Expenses [Abstract]
Operating									0	0	0
Selling, general and administrative									0	0	0
Restructuring charges									0	0	0
Impairment charges									0		0
Depreciation and amortization									0	0	0
Total expenses									0	0	0
Operating income (loss)									0	0	0
Interest (expense) income, net									0	0	0
Net loss on early extinguishment of debt (Note 9)									0		0
Other items, net									0	0	0
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies									0	0	0
(Provision) benefit for income taxes									0	0	0
Equity in earnings (loss) of investee companies, net of tax									-4,714,000,000	-3,458,000,000	-3,031,000,000
Net earnings (loss) from continuing operations									-4,714,000,000	-3,458,000,000	-3,031,000,000
Net earnings from discontinued operations, net of tax (Note 4)									0	0	0
Net earnings (loss)									-4,714,000,000	-3,458,000,000	-3,031,000,000
Total comprehensive income									-4,676,000,000	-3,278,000,000	-3,032,000,000
Assets [Abstract]
Cash and cash equivalents	0				0				0	0
Receivables, net	0				0				0	0
Programming and other inventory (Note 6)	0				0				0	0
Prepaid expense and other current assets	-30,000,000				-26,000,000				-30,000,000	-26,000,000
Current assets of discontinued operations (Note 4)					0					0
Total current assets	-30,000,000				-26,000,000				-30,000,000	-26,000,000
Property and equipment	0				0				0	0
Less accumulated depreciation and amortization	0				0				0	0
Net property and equipment (Note 2)	0				0				0	0
Programming and other inventory (Note 6)	0				0				0	0
Goodwill (Note 3)	0				0				0	0
Intangible assets (Note 3)	0				0				0	0
Investments in subsidiaries	-52,829,000,000				-50,869,000,000				-52,829,000,000	-50,869,000,000
Other assets	0				0				0	0
Assets held for sale					0					0
Intercompany	-24,498,000,000				-21,649,000,000				-24,498,000,000	-21,649,000,000
Assets of discontinued operations	0				0				0	0
Total assets	-77,357,000,000				-72,544,000,000				-77,357,000,000	-72,544,000,000
Liabilities and Equity [Abstract]
Accounts payable	0				0				0	0
Participants' share and royalties payable	0				0				0	0
Program rights	0				0				0	0
Commercial paper (Note 9)	0				0				0	0
Current portion of long-term debt (Note 9)	0				0				0	0
Accrued expenses and other current liabilities	-30,000,000				-26,000,000				-30,000,000	-26,000,000
Current liabilities of discontinued operations (Note 4)	0				0				0	0
Total current liabilities	-30,000,000				-26,000,000				-30,000,000	-26,000,000
Long-term debt (Note 9)	0				0				0	0
Other liabilities	0				0				0	0
Liabilities of discontinued operations (Note 4)	0				0				0	0
Intercompany	-24,498,000,000				-21,649,000,000				-24,498,000,000	-21,649,000,000
Stockholders' Equity
Preferred stock	-126,000,000				-126,000,000				-126,000,000	-126,000,000
Common stock	-713,000,000				-1,076,000,000				-713,000,000	-1,076,000,000
Additional paid-in capital	-60,894,000,000				-61,678,000,000				-60,894,000,000	-61,678,000,000
Retained earnings (deficit)	3,851,000,000				6,996,000,000				3,851,000,000	6,996,000,000
Accumulated other comprehensive loss (Note 1)	-78,000,000				-116,000,000				-78,000,000	-116,000,000
Stockholder' equity including treasury stock	-57,960,000,000				-56,000,000,000				-57,960,000,000	-56,000,000,000
Less treasury stock, at cost	-5,131,000,000				-5,131,000,000				-5,131,000,000	-5,131,000,000
Total Stockholders' Equity	-52,829,000,000				-50,869,000,000				-52,829,000,000	-50,869,000,000
Total Liabilities and Stockholders' Equity	-77,357,000,000				-72,544,000,000				-77,357,000,000	-72,544,000,000
Condensed Consolidating Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities									0	0	0
Investing Activities:
Acquisitions, net of cash acquired									0	0	0
Capital expenditures									0	0	0
Investments in and advances to investee companies									0	0	0
Proceeds from sale of investments									0	0	0
Proceeds from dispositions									0	0	0
Other investing activities									0
Net cash flow provided by (used for) investing activities from continuing operations									0	0	0
Net cash flow provided by (used for) investing activities from discontinued operations									0	0	0
Net cash flow provided by (used for) investing activities									0	0	0
Financing Activities:
Proceeds from short-term debt borrowings, net									0	0
Proceeds from issuance of notes									0		0
Repayment of notes and debentures									0		0
Payment of capital lease obligations									0	0	0
Payment of contingent consideration										0	0
Dividends									0	0	0
Purchase of Company common stock									0	0	0
Payment of payroll taxes in lieu of issuing shares for stock-based compensation									0	0	0
Proceeds from exercise of stock options									0	0	0
Excess tax benefit from stock-based compensation									0	0	0
Other financing activities									0	0
Increase (decrease) in intercompany payables									0	0	0
Net cash flow provided by (used for) financing activities from continuing operations									0
Net cash flow provided by financing activities from discontinued operations									0
Net cash flow provided by (used for) financing activities									0	0	0
Net increase (decrease) in cash and cash equivalents									0	0	0
Cash and cash equivalents, including discontinued operations, at beginning of period				0				0	0	0	0
Cash and cash equivalents, including discontinued operations, at end of period	0				0				0	0	0
CBS Corp [Member]
Condensed Consolidating Statement of Operations [Abstract]
Revenues									159,000,000	145,000,000	157,000,000
Costs and Expenses [Abstract]
Operating									68,000,000	69,000,000	74,000,000
Selling, general and administrative									61,000,000	65,000,000	87,000,000
Restructuring charges									0	0	0
Impairment charges									0		0
Depreciation and amortization									6,000,000	6,000,000	6,000,000
Total expenses									135,000,000	140,000,000	167,000,000
Operating income (loss)									24,000,000	5,000,000	-10,000,000
Interest (expense) income, net									-443,000,000	-457,000,000	-480,000,000
Net loss on early extinguishment of debt (Note 9)									-351,000,000		-32,000,000
Other items, net									-1,000,000	0	1,000,000
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies									-771,000,000	-452,000,000	-521,000,000
(Provision) benefit for income taxes									280,000,000	152,000,000	183,000,000
Equity in earnings (loss) of investee companies, net of tax									3,444,000,000	2,170,000,000	1,886,000,000
Net earnings (loss) from continuing operations									2,953,000,000	1,870,000,000	1,548,000,000
Net earnings from discontinued operations, net of tax (Note 4)									6,000,000	9,000,000	26,000,000
Net earnings (loss)									2,959,000,000	1,879,000,000	1,574,000,000
Total comprehensive income									2,769,000,000	1,903,000,000	1,444,000,000
Assets [Abstract]
Cash and cash equivalents	63,000,000				80,000,000				63,000,000	80,000,000
Receivables, net	29,000,000				30,000,000				29,000,000	30,000,000
Programming and other inventory (Note 6)	4,000,000				4,000,000				4,000,000	4,000,000
Prepaid expense and other current assets	306,000,000				179,000,000				306,000,000	179,000,000
Current assets of discontinued operations (Note 4)					0					0
Total current assets	402,000,000				293,000,000				402,000,000	293,000,000
Property and equipment	41,000,000				37,000,000				41,000,000	37,000,000
Less accumulated depreciation and amortization	15,000,000				9,000,000				15,000,000	9,000,000
Net property and equipment (Note 2)	26,000,000				28,000,000				26,000,000	28,000,000
Programming and other inventory (Note 6)	7,000,000				5,000,000				7,000,000	5,000,000
Goodwill (Note 3)	98,000,000				98,000,000				98,000,000	98,000,000
Intangible assets (Note 3)	0				0				0	0
Investments in subsidiaries	41,144,000,000				40,454,000,000				41,144,000,000	40,454,000,000
Other assets	219,000,000				89,000,000				219,000,000	89,000,000
Assets held for sale					0					0
Intercompany	0				0				0	0
Assets of discontinued operations	0				0				0	0
Total assets	41,896,000,000				40,967,000,000				41,896,000,000	40,967,000,000
Liabilities and Equity [Abstract]
Accounts payable	3,000,000				1,000,000				3,000,000	1,000,000
Participants' share and royalties payable	0				0				0	0
Program rights	5,000,000				5,000,000				5,000,000	5,000,000
Commercial paper (Note 9)	616,000,000				475,000,000				616,000,000	475,000,000
Current portion of long-term debt (Note 9)	4,000,000				5,000,000				4,000,000	5,000,000
Accrued expenses and other current liabilities	388,000,000				361,000,000				388,000,000	361,000,000
Current liabilities of discontinued operations (Note 4)	0				0				0	0
Total current liabilities	1,016,000,000				847,000,000				1,016,000,000	847,000,000
Long-term debt (Note 9)	6,383,000,000				5,791,000,000				6,383,000,000	5,791,000,000
Other liabilities	3,029,000,000				2,714,000,000				3,029,000,000	2,714,000,000
Liabilities of discontinued operations (Note 4)	0				0				0	0
Intercompany	24,498,000,000				21,649,000,000				24,498,000,000	21,649,000,000
Stockholders' Equity
Preferred stock	0				0				0	0
Common stock	1,000,000				1,000,000				1,000,000	1,000,000
Additional paid-in capital	44,041,000,000				43,474,000,000				44,041,000,000	43,474,000,000
Retained earnings (deficit)	-21,931,000,000				-24,890,000,000				-21,931,000,000	-24,890,000,000
Accumulated other comprehensive loss (Note 1)	-735,000,000				-545,000,000				-735,000,000	-545,000,000
Stockholder' equity including treasury stock	21,376,000,000				18,040,000,000				21,376,000,000	18,040,000,000
Less treasury stock, at cost	14,406,000,000				8,074,000,000				14,406,000,000	8,074,000,000
Total Stockholders' Equity	6,970,000,000				9,966,000,000				6,970,000,000	9,966,000,000
Total Liabilities and Stockholders' Equity	41,896,000,000				40,967,000,000				41,896,000,000	40,967,000,000
Condensed Consolidating Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities									-1,107,000,000	-934,000,000	-827,000,000
Investing Activities:
Acquisitions, net of cash acquired									0	0	0
Capital expenditures									0	0	0
Investments in and advances to investee companies									0	0	0
Proceeds from sale of investments									0	23,000,000	9,000,000
Proceeds from dispositions									0	0	0
Other investing activities									-4,000,000
Net cash flow provided by (used for) investing activities from continuing operations									-4,000,000	23,000,000	9,000,000
Net cash flow provided by (used for) investing activities from discontinued operations									-29,000,000	0	0
Net cash flow provided by (used for) investing activities									-33,000,000	23,000,000	9,000,000
Financing Activities:
Proceeds from short-term debt borrowings, net									141,000,000	475,000,000
Proceeds from issuance of notes									1,728,000,000		1,566,000,000
Repayment of notes and debentures									-1,146,000,000		-1,583,000,000
Payment of capital lease obligations									0	0	0
Payment of contingent consideration										0	0
Dividends									-292,000,000	-300,000,000	-276,000,000
Purchase of Company common stock									-3,595,000,000	-2,185,000,000	-1,137,000,000
Payment of payroll taxes in lieu of issuing shares for stock-based compensation									-146,000,000	-145,000,000	-105,000,000
Proceeds from exercise of stock options									283,000,000	146,000,000	168,000,000
Excess tax benefit from stock-based compensation									243,000,000	148,000,000	103,000,000
Other financing activities									-3,000,000	-4,000,000
Increase (decrease) in intercompany payables									3,921,000,000	2,602,000,000	2,202,000,000
Net cash flow provided by (used for) financing activities from continuing operations									1,134,000,000
Net cash flow provided by financing activities from discontinued operations									-11,000,000
Net cash flow provided by (used for) financing activities									1,123,000,000	737,000,000	938,000,000
Net increase (decrease) in cash and cash equivalents									-17,000,000	-174,000,000	120,000,000
Cash and cash equivalents, including discontinued operations, at beginning of period				80,000,000				254,000,000	80,000,000	254,000,000	134,000,000
Cash and cash equivalents, including discontinued operations, at end of period	63,000,000				80,000,000				63,000,000	80,000,000	254,000,000
CBS Operations Inc [Member]
Condensed Consolidating Statement of Operations [Abstract]
Revenues									11,000,000	11,000,000	15,000,000
Costs and Expenses [Abstract]
Operating									6,000,000	8,000,000	8,000,000
Selling, general and administrative									255,000,000	323,000,000	251,000,000
Restructuring charges									3,000,000	1,000,000	2,000,000
Impairment charges									0		0
Depreciation and amortization									16,000,000	14,000,000	14,000,000
Total expenses									280,000,000	346,000,000	275,000,000
Operating income (loss)									-269,000,000	-335,000,000	-260,000,000
Interest (expense) income, net									-383,000,000	-369,000,000	-351,000,000
Net loss on early extinguishment of debt (Note 9)									0		0
Other items, net									4,000,000	4,000,000	-5,000,000
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies									-648,000,000	-700,000,000	-616,000,000
(Provision) benefit for income taxes									229,000,000	235,000,000	215,000,000
Equity in earnings (loss) of investee companies, net of tax									1,270,000,000	1,288,000,000	1,145,000,000
Net earnings (loss) from continuing operations									851,000,000	823,000,000	744,000,000
Net earnings from discontinued operations, net of tax (Note 4)									-1,000,000	-5,000,000	-3,000,000
Net earnings (loss)									850,000,000	818,000,000	741,000,000
Total comprehensive income									857,000,000	815,000,000	734,000,000
Assets [Abstract]
Cash and cash equivalents	1,000,000				1,000,000				1,000,000	1,000,000
Receivables, net	2,000,000				2,000,000				2,000,000	2,000,000
Programming and other inventory (Note 6)	3,000,000				2,000,000				3,000,000	2,000,000
Prepaid expense and other current assets	27,000,000				18,000,000				27,000,000	18,000,000
Current assets of discontinued operations (Note 4)					0					0
Total current assets	33,000,000				23,000,000				33,000,000	23,000,000
Property and equipment	162,000,000				137,000,000				162,000,000	137,000,000
Less accumulated depreciation and amortization	98,000,000				83,000,000				98,000,000	83,000,000
Net property and equipment (Note 2)	64,000,000				54,000,000				64,000,000	54,000,000
Programming and other inventory (Note 6)	8,000,000				0				8,000,000	0
Goodwill (Note 3)	62,000,000				62,000,000				62,000,000	62,000,000
Intangible assets (Note 3)	0				0				0	0
Investments in subsidiaries	11,685,000,000				10,415,000,000				11,685,000,000	10,415,000,000
Other assets	17,000,000				18,000,000				17,000,000	18,000,000
Assets held for sale					0					0
Intercompany	2,726,000,000				3,240,000,000				2,726,000,000	3,240,000,000
Assets of discontinued operations	0				0				0	0
Total assets	14,595,000,000				13,812,000,000				14,595,000,000	13,812,000,000
Liabilities and Equity [Abstract]
Accounts payable	24,000,000				8,000,000				24,000,000	8,000,000
Participants' share and royalties payable	0				0				0	0
Program rights	3,000,000				2,000,000				3,000,000	2,000,000
Commercial paper (Note 9)	0				0				0	0
Current portion of long-term debt (Note 9)	0				0				0	0
Accrued expenses and other current liabilities	270,000,000				293,000,000				270,000,000	293,000,000
Current liabilities of discontinued operations (Note 4)	0				0				0	0
Total current liabilities	297,000,000				303,000,000				297,000,000	303,000,000
Long-term debt (Note 9)	0				0				0	0
Other liabilities	249,000,000				317,000,000				249,000,000	317,000,000
Liabilities of discontinued operations (Note 4)	0				0				0	0
Intercompany	0				0				0	0
Stockholders' Equity
Preferred stock	0				0				0	0
Common stock	123,000,000				123,000,000				123,000,000	123,000,000
Additional paid-in capital	0				0				0	0
Retained earnings (deficit)	14,260,000,000				13,410,000,000				14,260,000,000	13,410,000,000
Accumulated other comprehensive loss (Note 1)	-3,000,000				-10,000,000				-3,000,000	-10,000,000
Stockholder' equity including treasury stock	14,380,000,000				13,523,000,000				14,380,000,000	13,523,000,000
Less treasury stock, at cost	331,000,000				331,000,000				331,000,000	331,000,000
Total Stockholders' Equity	14,049,000,000				13,192,000,000				14,049,000,000	13,192,000,000
Total Liabilities and Stockholders' Equity	14,595,000,000				13,812,000,000				14,595,000,000	13,812,000,000
Condensed Consolidating Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities									-194,000,000	-187,000,000	-179,000,000
Investing Activities:
Acquisitions, net of cash acquired									0	0	0
Capital expenditures									-27,000,000	-27,000,000	-21,000,000
Investments in and advances to investee companies									0	0	0
Proceeds from sale of investments									0	1,000,000	2,000,000
Proceeds from dispositions									0	0	0
Other investing activities									0
Net cash flow provided by (used for) investing activities from continuing operations									-27,000,000	-26,000,000	-19,000,000
Net cash flow provided by (used for) investing activities from discontinued operations									0	0	0
Net cash flow provided by (used for) investing activities									-27,000,000	-26,000,000	-19,000,000
Financing Activities:
Proceeds from short-term debt borrowings, net									0	0
Proceeds from issuance of notes									0		0
Repayment of notes and debentures									0		0
Payment of capital lease obligations									0	0	0
Payment of contingent consideration										0	0
Dividends									0	0	0
Purchase of Company common stock									0	0	0
Payment of payroll taxes in lieu of issuing shares for stock-based compensation									0	0	0
Proceeds from exercise of stock options									0	0	0
Excess tax benefit from stock-based compensation									0	0	0
Other financing activities									0	0
Increase (decrease) in intercompany payables									221,000,000	213,000,000	198,000,000
Net cash flow provided by (used for) financing activities from continuing operations									221,000,000
Net cash flow provided by financing activities from discontinued operations									0
Net cash flow provided by (used for) financing activities									221,000,000	213,000,000	198,000,000
Net increase (decrease) in cash and cash equivalents									0	0	0
Cash and cash equivalents, including discontinued operations, at beginning of period				1,000,000				1,000,000	1,000,000	1,000,000	1,000,000
Cash and cash equivalents, including discontinued operations, at end of period	1,000,000				1,000,000				1,000,000	1,000,000	1,000,000
Non-Guarantor Affiliates [Member]
Condensed Consolidating Statement of Operations [Abstract]
Revenues									13,636,000,000	13,849,000,000	12,648,000,000
Costs and Expenses [Abstract]
Operating									8,015,000,000	8,047,000,000	7,182,000,000
Selling, general and administrative									2,146,000,000	2,158,000,000	2,104,000,000
Restructuring charges									23,000,000	19,000,000	17,000,000
Impairment charges									52,000,000		11,000,000
Depreciation and amortization									259,000,000	270,000,000	286,000,000
Total expenses									10,495,000,000	10,494,000,000	9,600,000,000
Operating income (loss)									3,141,000,000	3,355,000,000	3,048,000,000
Interest (expense) income, net									476,000,000	459,000,000	435,000,000
Net loss on early extinguishment of debt (Note 9)									-1,000,000		0
Other items, net									-33,000,000	3,000,000	11,000,000
Earnings (loss) from continuing operations before income taxes and equity in earnings (loss) of investee companies									3,583,000,000	3,817,000,000	3,494,000,000
(Provision) benefit for income taxes									-1,271,000,000	-1,265,000,000	-1,210,000,000
Equity in earnings (loss) of investee companies, net of tax									-48,000,000	-49,000,000	-37,000,000
Net earnings (loss) from continuing operations									2,264,000,000	2,503,000,000	2,247,000,000
Net earnings from discontinued operations, net of tax (Note 4)									1,600,000,000	137,000,000	43,000,000
Net earnings (loss)									3,864,000,000	2,640,000,000	2,290,000,000
Total comprehensive income									3,819,000,000	2,463,000,000	2,298,000,000
Assets [Abstract]
Cash and cash equivalents	364,000,000				287,000,000				364,000,000	287,000,000
Receivables, net	3,428,000,000				3,202,000,000				3,428,000,000	3,202,000,000
Programming and other inventory (Note 6)	915,000,000				766,000,000				915,000,000	766,000,000
Prepaid expense and other current assets	477,000,000				474,000,000				477,000,000	474,000,000
Current assets of discontinued operations (Note 4)					351,000,000					351,000,000
Total current assets	5,184,000,000				5,080,000,000				5,184,000,000	5,080,000,000
Property and equipment	2,961,000,000				2,886,000,000				2,961,000,000	2,886,000,000
Less accumulated depreciation and amortization	1,618,000,000				1,507,000,000				1,618,000,000	1,507,000,000
Net property and equipment (Note 2)	1,343,000,000				1,379,000,000				1,343,000,000	1,379,000,000
Programming and other inventory (Note 6)	1,802,000,000				1,692,000,000				1,802,000,000	1,692,000,000
Goodwill (Note 3)	6,538,000,000				6,428,000,000				6,538,000,000	6,428,000,000
Intangible assets (Note 3)	6,008,000,000				5,870,000,000				6,008,000,000	5,870,000,000
Investments in subsidiaries	0				0				0	0
Other assets	2,252,000,000				1,856,000,000				2,252,000,000	1,856,000,000
Assets held for sale					314,000,000					314,000,000
Intercompany	21,772,000,000				18,409,000,000				21,772,000,000	18,409,000,000
Assets of discontinued operations	39,000,000				3,124,000,000				39,000,000	3,124,000,000
Total assets	44,938,000,000				44,152,000,000				44,938,000,000	44,152,000,000
Liabilities and Equity [Abstract]
Accounts payable	275,000,000				277,000,000				275,000,000	277,000,000
Participants' share and royalties payable	999,000,000				1,008,000,000				999,000,000	1,008,000,000
Program rights	396,000,000				391,000,000				396,000,000	391,000,000
Commercial paper (Note 9)	0				0				0	0
Current portion of long-term debt (Note 9)	16,000,000				15,000,000				16,000,000	15,000,000
Accrued expenses and other current liabilities	1,038,000,000				1,138,000,000				1,038,000,000	1,138,000,000
Current liabilities of discontinued operations (Note 4)	26,000,000				254,000,000				26,000,000	254,000,000
Total current liabilities	2,750,000,000				3,083,000,000				2,750,000,000	3,083,000,000
Long-term debt (Note 9)	127,000,000				149,000,000				127,000,000	149,000,000
Other liabilities	3,163,000,000				2,766,000,000				3,163,000,000	2,766,000,000
Liabilities of discontinued operations (Note 4)	118,000,000				477,000,000				118,000,000	477,000,000
Intercompany	0				0				0	0
Stockholders' Equity
Preferred stock	126,000,000				126,000,000				126,000,000	126,000,000
Common stock	590,000,000				953,000,000				590,000,000	953,000,000
Additional paid-in capital	60,894,000,000				61,678,000,000				60,894,000,000	61,678,000,000
Retained earnings (deficit)	-18,111,000,000				-20,406,000,000				-18,111,000,000	-20,406,000,000
Accumulated other comprehensive loss (Note 1)	81,000,000				126,000,000				81,000,000	126,000,000
Stockholder' equity including treasury stock	43,580,000,000				42,477,000,000				43,580,000,000	42,477,000,000
Less treasury stock, at cost	4,800,000,000				4,800,000,000				4,800,000,000	4,800,000,000
Total Stockholders' Equity	38,780,000,000				37,677,000,000				38,780,000,000	37,677,000,000
Total Liabilities and Stockholders' Equity	44,938,000,000				44,152,000,000				44,938,000,000	44,152,000,000
Condensed Consolidating Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities									2,576,000,000	2,994,000,000	2,821,000,000
Investing Activities:
Acquisitions, net of cash acquired									-27,000,000	-20,000,000	-146,000,000
Capital expenditures									-179,000,000	-185,000,000	-179,000,000
Investments in and advances to investee companies									-98,000,000	-176,000,000	-91,000,000
Proceeds from sale of investments									12,000,000	6,000,000	2,000,000
Proceeds from dispositions									7,000,000	164,000,000	49,000,000
Other investing activities									0
Net cash flow provided by (used for) investing activities from continuing operations									-285,000,000	-211,000,000	-365,000,000
Net cash flow provided by (used for) investing activities from discontinued operations									-256,000,000	-58,000,000	-76,000,000
Net cash flow provided by (used for) investing activities									-541,000,000	-269,000,000	-441,000,000
Financing Activities:
Proceeds from short-term debt borrowings, net									0	0
Proceeds from issuance of notes									0		0
Repayment of notes and debentures									-6,000,000		0
Payment of capital lease obligations									-17,000,000	-17,000,000	-19,000,000
Payment of contingent consideration										-30,000,000	-33,000,000
Dividends									0	0	0
Purchase of Company common stock									0	0	0
Payment of payroll taxes in lieu of issuing shares for stock-based compensation									0	0	0
Proceeds from exercise of stock options									0	0	0
Excess tax benefit from stock-based compensation									0	0	0
Other financing activities									0	0
Increase (decrease) in intercompany payables									-4,142,000,000	-2,815,000,000	-2,400,000,000
Net cash flow provided by (used for) financing activities from continuing operations									-4,165,000,000
Net cash flow provided by financing activities from discontinued operations									2,178,000,000
Net cash flow provided by (used for) financing activities									-1,987,000,000	-2,862,000,000	-2,452,000,000
Net increase (decrease) in cash and cash equivalents									48,000,000	-137,000,000	-72,000,000
Cash and cash equivalents, including discontinued operations, at beginning of period				316,000,000				453,000,000	316,000,000	453,000,000	525,000,000
Cash and cash equivalents, including discontinued operations, at end of period	$364,000,000				$316,000,000				$364,000,000	$316,000,000	$453,000,000

Schedule_II_Valuation_and_Qual1

Schedule II - Valuation and Qualifying Accounts (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$60	$62	$77
Balance acquired through acquisitions	0	0	0
Charged to cost and expenses	9	14	14
Charged to other accounts	0	0	0
Deductions	19	16	29
Balance at end of period	50	60	62
Valuation allowance on deferred tax assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	634	240	227
Balance acquired through acquisitions	1	0	0
Charged to cost and expenses	36	450	37
Charged to other accounts	0	0	0
Deductions	96	56	24
Balance at end of period	575	634	240
Reserve for inventory obsolescence [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	35	32	27
Balance acquired through acquisitions	0	0	0
Charged to cost and expenses	8	15	13
Charged to other accounts	0	0	0
Deductions	13	12	8
Balance at end of period	$30	$35	$32