Income Taxes (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Property and equipment		$ 6	$ 5
Deferred site rental receivable		7	7
Deferred Tax Liabilities, Gross		13	12
Deferred Tax Assets, Goodwill and Intangible Assets		3	4
Net operating loss carryforwards	[1]	18	18
Deferred ground lease payable	[2]	3	2
Accrued liabilities		5	5
Other		2	3
Valuation allowance, asset		0	(1)
Total deferred income tax assets, net		31	31
Deferred Tax Assets, Net		$ 18	$ 19

[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.

[2] See "Recently Adopted Accounting Pronouncements" in note 3 for a discussion of the recently adopted new lease standard.