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Commitment and Contingencies - Narrative (Details) $ in Millions	Sep. 30, 2015 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Outstanding letters of credit and surety bonds	$ 111.8

X

- Definition

Letters of Credit and Surety Bonds, Amount Outstanding

+ References

No definition available.

+ Details

Name:	out_LettersofCreditandSuretyBondsAmountOutstanding
Namespace Prefix:	out_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

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