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Stock-Based Compensation - Schedule of Stock Options Roll Forward (Details) (USD $) | 9 Months Ended |  | 0 Months Ended | 3 Months Ended |  |
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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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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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