Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 22,177	$ 22,984	$ 23,071
Net change	(265)	(50)	(158)
Ending Balance	24,711	22,177	22,984
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	75	90	(81)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,945)	(2,895)	(2,737)
Ending Balance	(3,210)	(2,945)	(2,895)
Net Unrealized Gains (Losses) on Debt Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	23	65	33
Net change	(87)	(42)	32
Ending Balance	(64)	23	65
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	(27)	(13)	9
Foreign Currency Translation Adjustment Gains (Losses), Net of Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,392)	(2,229)	(2,189)
Net change	(230)	(163)	(40)
Ending Balance	(2,622)	(2,392)	(2,229)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	75	51	(62)
Net Unrealized Pension and Other Postretirement Benefit Gains (Losses)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(576)	(731)	(581)
Net change	52	155	(150)
Ending Balance	(524)	(576)	(731)
Tax impact for the changes in each component of accumulated other comprehensive (loss) income
Total tax impact	$ 27	$ 52	$ (28)