Income Taxes (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Property and equipment		$ 8	$ 7
Deferred site rental receivable		9	8
Total deferred income tax liabilities		17	15
Intangible assets		1	1
Net operating loss carryforwards	[1]	12	13
Straight-line rent expense liability		4	4
Accrued liabilities		6	6
Other		4	2
Valuation allowances		(2)	0
Total deferred income tax assets, net		25	26
Net deferred income tax assets (liabilities)		$ 8	$ 11

[1] Balance results from the Company's foreign NOLs. Due to the Company's REIT status, no federal or state NOLs result in the Company recording a deferred income tax asset. See further discussion surrounding the Company's NOL balances below.