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Commitments and Contingencies Tower purchase option (Details)	Dec. 31, 2021
Subject to Capital Lease with 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:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	cci_ContractualTermsAxis=cci_SubjectToCapitalLeaseWithTMOOrATTMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: