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Basis of Presentation (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
AT&T [Member]
Purchase Option, Percentage of Towers	22.00%
T-Mobile [Member]
Purchase Option, Percentage of Towers	15.00%
Sprint assumed by T-Mobile [Member]
Purchase Option, Percentage of Towers	16.00%
Subject to Capital Lease with TMO or AT&T [Member]
Purchase Option, Percentage of Towers	53.00%
AT&T Prior to 2025 [Member]
Purchase Option Price	$ 10
AT&T lease or sublease in accordance with TMO Agreement [Member]
Purchase Option Price	$ 405
Tower count as a percentage of total towers	1.00%
T-Mobile [Member]
Purchase Option Price	$ 2,000
Period of tower lease	28 years
Sprint assumed by T-Mobile [Member]
Purchase Option Price	$ 2,300
Period of tower lease	32 years
AT&T [Member]
Purchase Option Price	$ 4,200
Period of tower lease	28 years

X

- Definition

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

+ References

No definition available.

+ Details

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Namespace Prefix:	cci_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- Definition

This element relates to the total future purchase option price.

+ References

No definition available.

+ Details

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Namespace Prefix:	cci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Site count as a percentage of total sites

+ References

No definition available.

+ Details

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Namespace Prefix:	cci_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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

X

- Details

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Namespace Prefix:
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Period Type:

X

- Details

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Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LeaseContractualTermAxis=cci_AttPriorTo2025Member
Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

X

- Details

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Period Type:

X

- Details

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Period Type:

X

- Details

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Period Type: