Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax	$ 130	$ 29	$ 284	$ (104)
Derivative instruments	2	(6)	(18)	(28)
Total equity	18,592	18,800	18,592	18,800		$ 17,851
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(25)	65	15	80
Other Comprehensive Income (Loss), Tax	2	(2)	(5)	(20)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(23)	63	10	60
Other Comprehensive Income (Loss), Net of Tax	(22)	61	10	55
Total equity	(233)	(198)	(233)	(198)	$ (211)	(243)	$ (259)	$ (253)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	1	(3)	0	(7)
Reclassification from AOCI, Current Period, Tax	0	1	0	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1	(2)	0	(5)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	129	(39)	255	(155)
Other Comprehensive Income (Loss), Tax	12	0	15	(3)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	141	(39)	270	(158)
Other Comprehensive Income (Loss), Net of Tax	129	(43)	251	(165)
Total equity	(1,812)	(2,056)	(1,812)	(2,056)	(1,941)	(2,063)	(2,013)	(1,891)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(12)	(4)	(19)	(7)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	1	1	1	0
Other Comprehensive Income (Loss), Net of Tax	21	17	41	34
Total equity	(5,679)	(5,452)	(5,679)	(5,452)	(5,700)	(5,720)	(5,469)	(5,486)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	26	21	52	43
Reclassification from AOCI, Current Period, Tax	(6)	(5)	(12)	(9)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	20	16	40	34
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax	130	29	284	(104)
Total equity	(7,826)	(7,785)	(7,826)	(7,785)	(7,956)	(8,110)	(7,814)	(7,681)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, before Tax	6	(13)	(9)	(46)
Other Comprehensive Income (Loss), Tax	(4)	8	(6)	11
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	2	(5)	(15)	(35)
Derivative instruments	2	(6)	(18)	(28)
Total equity	(102)	(79)	(102)	(79)	$ (104)	$ (84)	$ (73)	$ (51)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	1	(1)	(3)	9
Reclassification from AOCI, Current Period, Tax	(1)	0	0	(2)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 0	$ (1)	$ (3)	$ 7