Fair Value Measurements - Effect of Interest Rate Swap Contracts (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Total interest expense which reflects the effects of cash flow hedges	$ (78)	$ (68)	$ (231)	$ (254)
Hedged item	(5)	(5)	(15)	(12)
Derivative designated as hedging instrument	$ 9	$ 3	$ 26	$ 4