Fair Value Measurements - Effect of Interest Rate Swap Contracts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Total interest expense which reflects the effects of cash flow hedges	$ (78)	$ (70)	$ (153)	$ (186)
Hedged item	(5)	(4)	(10)	(7)
Derivative designated as hedging instrument	$ 9	$ 1	$ 17	$ 1