XML 56 R42.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Commitments and Contingencies Commitment and Contingencies (Details) | Sep. 30, 2016
--- | ---
Subject to Capital Lease with Sprint, TMO, or AT&T [Member] |
Other Commitments [Line Items] |
Purchase Option, Percentage of Towers | 54.00%

X
- Definition Purchase Option, Percentage of Towers + References No definition available. + Details
Name: | cci_PurchaseOptionPercentageofTowers
Namespace Prefix: | cci_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cci_ContractualTermsAxis=cci_SubjecttoCapitalLeasewithSprintTMOorATTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |