Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 28,057	$ 24,711	$ 22,177
Net change	(323)	138	(265)
Ending Balance	30,264	28,057	24,711
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	218	(145)	75
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,072)	(3,210)	(2,945)
Net change	(323)	138	(265)
Ending Balance	(3,395)	(3,072)	(3,210)
Net Unrealized Gains (Losses) on Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(14)	(64)	23
Net change	5	50	(87)
Ending Balance	(9)	(14)	(64)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	2	16	(27)
Foreign Currency Translation Adjustment Gains (Losses), Net of Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,571)	(2,622)	(2,392)
Net change	(353)	51	(230)
Ending Balance	(2,924)	(2,571)	(2,622)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	205	(158)	75
Net unrealized pension and other postretirement benefit gains (losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(487)	(524)	(576)
Net change	25	37	52
Ending Balance	(462)	(487)	(524)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	$ 11	$ (3)	$ 27