Accumulated Other Comprehensive Income - Changes in Accumulated Balances of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss), Tax
Beginning balance	$ 36	$ (1)	$ 21	$ 12
Other comprehensive income (loss) before reclassifications	(13)	(17)	(9)	(35)
Less: Amount of gain (loss) reclassified from AOCI	(2)	8	(13)	3
Net current period other comprehensive income (loss)	(11)	(25)	4	(38)
Ending balance	25	(26)	25	(26)
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance			5,153
Other comprehensive income (loss) before reclassifications	13	61	(41)	(6)
Less: Amount of gain (loss) reclassified from AOCI	1	44	39	52
Other comprehensive income (loss), net of tax	12	17	(80)	(58)
Ending balance	5,899	4,853	5,899	4,853
Unrealized Gains (Losses) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance	24	190	114	65
Other comprehensive income (loss) before reclassifications	43	185	2	325
Less: Amount of gain (loss) reclassified from AOCI	3	35	52	50
Net current period other comprehensive income (loss)	40	150	(50)	275
Ending balance	64	340	64	340
Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance	(79)	(75)	(98)	(7)
Other comprehensive income (loss) before reclassifications	13	(30)	32	(100)
Less: Amount of gain (loss) reclassified from AOCI	0	1	0	(1)
Net current period other comprehensive income (loss)	13	(31)	32	(99)
Ending balance	(66)	(106)	(66)	(106)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance	186	209	222	328
Other comprehensive income (loss) before reclassifications	(30)	(77)	(66)	(196)
Less: Amount of gain (loss) reclassified from AOCI	0	0	0	0
Net current period other comprehensive income (loss)	(30)	(77)	(66)	(196)
Ending balance	156	132	156	132
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	167	323	259	398
Ending balance	$ 179	$ 340	$ 179	$ 340