Accumulated Other Comprehensive Income - Changes in Accumulated Balances of Other Comprehensive Income (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss), Tax
Beginning balance	$ 20	$ 30	$ 8	$ 37
Other comprehensive income (loss) before reclassifications	10	(1)	20	(6)
Less: Amount of gain (loss) reclassified from AOCI	1	2	(1)	4
Net current period other comprehensive income (loss)	9	(3)	21	(10)
Ending balance	29	27	29	27
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance			5,158
Other comprehensive income (loss) before reclassifications	0	(12)	(6)	(32)
Less: Amount of gain (loss) reclassified from AOCI	(3)	(6)	5	(12)
Other comprehensive income (loss), net of tax	3	(6)	(11)	(20)
Ending balance	4,749	5,509	4,749	5,509
Unrealized Gains (Losses) on Derivative Instruments
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance	16	9	75	(13)
Other comprehensive income (loss) before reclassifications	(59)	(1)	(108)	13
Less: Amount of gain (loss) reclassified from AOCI	(4)	(8)	6	(16)
Net current period other comprehensive income (loss)	(55)	7	(114)	29
Ending balance	(39)	16	(39)	16
Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance	1	(37)	(7)	(45)
Other comprehensive income (loss) before reclassifications	10	6	18	14
Less: Amount of gain (loss) reclassified from AOCI	0	0	0	0
Net current period other comprehensive income (loss)	10	6	18	14
Ending balance	11	(31)	11	(31)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Before Tax
Beginning balance	155	169	130	206
Other comprehensive income (loss) before reclassifications	39	(16)	64	(53)
Less: Amount of gain (loss) reclassified from AOCI	0	0	0	0
Net current period other comprehensive income (loss)	39	(16)	64	(53)
Ending balance	194	153	194	153
Accumulated other comprehensive income:
Accumulated Other Comprehensive Income (Loss), Net of Tax
Beginning balance	192	171	206	185
Ending balance	$ 195	$ 165	$ 195	$ 165

AOCI, Before Tax [Roll Forward]

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Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, attributable to parent. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).

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