XML 44 R29.htm IDEA: XBRL DOCUMENT
v3.10.0.1

General Business (Details) | Jun. 30, 2018
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Subject to Capital Lease with Sprint, TMO, or AT&T [Member] |
Purchase Option, Percentage of Towers | 53.00%

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

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