Segment Data (Narrative) (Details) $ in Billions	6 Months Ended	12 Months Ended
Jun. 30, 2023 USD ($) segment	Dec. 31, 2022 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of business segments \| segment	2
Number of reportable segments \| segment	2
Domestic Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 5.7	$ 5.9
International Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	3.6	3.5
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 2.2	$ 2.0
Foreign Countries, Other than Brazil [Member] \| Long-Lived Assets [Member] \| Maximum [Member] \| Geographic Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk percentage	5.00%	5.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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