Name:	cci_AllowanceForDeferredSiteRentalReceivables
Namespace Prefix:	cci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This disclosure represents the initial term of the Company’s ground lease agreements

No definition available.

Name:	cci_GroundLeaseAgreementInitialTerm
Namespace Prefix:	cci_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use and are associated with underlying transactions that are classified as investing activities.

No definition available.

Name:	cci_IncreaseDecreaseInRestrictedCashForInvestingActivities
Namespace Prefix:	cci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

This disclosure represents the original maturities of the Company's cash equivalents on the balance sheet

No definition available.

Name:	cci_OriginalMaturitiesOfCashEquivalents
Namespace Prefix:	cci_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

The threshold percentage of an uncertain tax position at which the Company will recognize a tax position.

No definition available.

Name:	cci_PercentageOfTaxPositionThatIsLikelyOfBeingRealizedUponUltimateSettlement
Namespace Prefix:	cci_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Portion of Company site rental costs That are related to ground lease expenses

No definition available.

Name:	cci_PortionOfCompanySiteRentalCostsThatAreGroundLeaseExpenses
Namespace Prefix:	cci_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Revenue Recognition Non Cancelable Lease Term, Range (Maximum)

No definition available.

Name:	cci_RevenueRecognitionNonCancelableLeaseTermRangeMaximum
Namespace Prefix:	cci_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Revenue Recognition Non-cancelable Lease Term, Range (Minimum)

No definition available.

Name:	cci_RevenueRecognitionNonCancelableLeaseTermRangeMinimum
Namespace Prefix:	cci_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The useful life of all finite-lived intangible assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 12, 13, 14

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 35

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6904245&loc=d3e15372-109273

Name:	us-gaap_FiniteLivedIntangibleAssetsUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as operating activities. This may include cash restricted for regulatory purposes.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Name:	us-gaap_IncreaseDecreaseInRestrictedCashForOperatingActivities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

No definition available.