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Stock-Based Compensation - Schedule of Stock Options Roll Forward (Details) (USD $)	9 Months Ended		0 Months Ended	3 Months Ended
	Sep. 30, 2014 CBS Corp. Equity and Incentive Plan Stock options	Jul. 16, 2014 CBS Corp. Equity and Incentive Plan Stock options	Jul. 16, 2014 Omnibus Stock Incentive Plan	Sep. 30, 2014 Omnibus Stock Incentive Plan	Sep. 30, 2014 Omnibus Stock Incentive Plan Stock options	Jul. 16, 2014 Omnibus Stock Incentive Plan Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Converted Awards, Number		219,741
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding as of beginning of period	399,581				390,611
Exercised	(123,260)			(2,426)
Forfeited or expired	(38,523)			(16,170)
Share-based Compensation Arrangements, Share-based Payment Awards, Options, Converted to Awards, Number			409,207
Outstanding as of end of period	18,057				390,611
Exercisable as of September 30, 2014	18,057				166,234
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, options outstanding, beginning balance	$ 29.30	$ 33.27			$ 17.67	$ 17.87
Weighted average exercise price, exercised	$ 22.04			$ 14.71
Weighted average exercise price, forfeited	$ 30.75			$ 23.08
Weighted average exercise price, options outstanding, ending balance	$ 27.38	$ 33.27			$ 17.67	$ 17.87
Weighted average exercise price, options exercisable	$ 27.38				$ 12.29

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Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Outstanding, Converted From Awards, Number

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Number of options outstanding, including both vested and non-vested options.

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Number of share options (or share units) exercised during the current period.

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