Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 24,711	$ 22,177
Net change	104	(28)
Ending Balance	25,992	22,383
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	(34)	(32)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,210)	(2,945)
Net change	104	(28)
Ending Balance	(3,106)	(2,973)
Net Unrealized Gains (Losses) on Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(64)	23
Net change	19	(28)
Ending Balance	(45)	(5)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	6	(9)
Foreign Currency Translation Adjustment Gains (Losses), net of hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,622)	(2,392)
Net change	28	(20)
Ending Balance	(2,594)	(2,412)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	(45)	(30)
Net Unrealized Pension and Other Postretirement Benefit Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(524)	(576)
Net change	57	20
Ending Balance	(467)	(556)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	$ 5	$ 7