Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 17	$ 52
Other comprehensive (loss) income, net of income taxes:
Employee benefit plans	(1)	0
Interest rate derivatives	(12)	7
Other comprehensive (loss) income, net of income taxes	(13)	7
Comprehensive income	$ 4	$ 59