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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

X

- Definition

Letters of Credit and Surety Bonds, Amount Outstanding

+ References

No definition available.

+ Details

Name:	cbso_LettersofCreditandSuretyBondsAmountOutstanding
Namespace Prefix:	cbso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Related Party Transaction, Indemnification of Letters of Credit and Surety Bonds by Affiliate

+ References

No definition available.

+ Details

Name:	cbso_RelatedPartyTransactionIndemnificationofLettersofCreditandSuretyBondsbyAffiliate
Namespace Prefix:	cbso_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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

X

- Details

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