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 of the period	$ 35,802
Other Comprehensive Income (Loss)	323	$ 572	$ (481)
End of the period	36,686	35,802
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	(8,374)	(8,946)
Other comprehensive income (loss) before reclassifications	312	111
(Income) loss amounts reclassified from accumulated other comprehensive income	11	461
Other Comprehensive Income (Loss)	323	572	(481)
End of the period	(8,051)	(8,374)	(8,946)
Cumulative Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	(5,839)	(4,859)
Other comprehensive income (loss) before reclassifications	(894)	(980)
(Income) loss amounts reclassified from accumulated other comprehensive income	0	0
Other Comprehensive Income (Loss)	(894)	(980)
End of the period	(6,733)	(5,839)	(4,859)
Net Actuarial Gains (Losses) and Prior Service (Costs) and Credits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	(2,670)	(3,871)
Other comprehensive income (loss) before reclassifications	1,007	954
(Income) loss amounts reclassified from accumulated other comprehensive income	170	247
Other Comprehensive Income (Loss)	1,177	1,201
End of the period	(1,493)	(2,670)	(3,871)
Cumulative Gains (Losses) on Derivative Instruments Designated as Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning of the period	135	(216)
Other comprehensive income (loss) before reclassifications	199	137
(Income) loss amounts reclassified from accumulated other comprehensive income	(159)	214
Other Comprehensive Income (Loss)	40	351
End of the period	$ 175	$ 135	$ (216)