Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 32,311	$ 29,540	$ 30,264	$ 28,057
Net Change	(1)	5	146	(123)
Ending Balance	32,417	29,707	32,417	29,707
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Tax expense (benefit)	(8)	(33)	(212)	27
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,248)	(3,200)	(3,395)	(3,072)
Net Change	(1)	5	146	(123)
Ending Balance	(3,249)	(3,195)	(3,249)	(3,195)
Net Unrealized Gains (Losses) on Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(6)	(10)	(9)	(14)
Net Change	1	4	4	8
Ending Balance	(5)	(6)	(5)	(6)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Tax expense (benefit)	0	0	1	2
Foreign Currency Translation Adjustment Gains (Losses), net of hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,792)	(2,707)	(2,924)	(2,571)
Net Change	(6)	1	126	(135)
Ending Balance	(2,798)	(2,706)	(2,798)	(2,706)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Tax expense (benefit)	(11)	(26)	(208)	30
Net Unrealized Pension and Other Postretirement Benefit Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(450)	(483)	(462)	(487)
Net Change	4	0	16	4
Ending Balance	(446)	(483)	(446)	(483)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Tax expense (benefit)	$ 3	$ (7)	$ (4)	$ (5)