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.

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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Segment Data (Narrative) (Details) $ in Billions	9 Months Ended
Segment Data (Narrative) (Details) $ in Billions	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023	Dec. 31, 2023 USD ($)
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		$ 5.4
International Site Leasing [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	3.3		3.4
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1.9		$ 2.1
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%