Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 30,264	$ 28,057	$ 24,711
Net Change	118	(323)	138
Ending Balance	33,474	30,264	28,057
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	(290)	218	(145)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,395)	(3,072)	(3,210)
Net Change	118	(323)	138
Ending Balance	(3,277)	(3,395)	(3,072)
Net Unrealized Gains (Losses) on Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(9)	(14)	(64)
Net Change	5	5	50
Ending Balance	(4)	(9)	(14)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	1	2	16
Foreign Currency Translation Adjustment Gains (Losses), Net of Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,924)	(2,571)	(2,622)
Net Change	141	(353)	51
Ending Balance	(2,783)	(2,924)	(2,571)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	(258)	205	(158)
Net Unrealized Pension and Other Postretirement Benefit Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(462)	(487)	(524)
Net Change	(28)	25	37
Ending Balance	(490)	(462)	(487)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	$ (33)	$ 11	$ (3)