Schedule II, Valuation and Qualifying Accounts (Details) - Allowance for Bad Debts - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Jan. 1		$ 9	$ 8	$ 8
Charged to costs and expenses		4	4	4
Charged to other accounts	[1]	1	1	1
Deductions from reserves	[2]	(5)	(4)	(5)
Balance at Dec. 31		$ 9	$ 9	$ 8

[1] Recovery of amounts previously written-off.

[2] Deductions related primarily to bad debt write-offs.