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Commitment and Contingencies - Narrative (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Commitments and Contingencies Disclosure [Abstract] |  |
Outstanding letters of credit and surety bonds | $ 99.3 | $ 78.3
CBS Corp. |  |
Related Party Transaction [Line Items] |  |
Indemnification of Letters of Credit and Surety Bonds | $ 0 | $ 78.3

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- Definition Letters of Credit and Surety Bonds, Amount Outstanding + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Related Party Transaction, Indemnification of Letters of Credit and Surety Bonds by Affiliate + References No definition available. + Details
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Namespace Prefix: | cbso_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration