Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Derivative instruments [Abstract]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 225
Pension and other postretirement benefits
Total AOCI ending balance at September 30	$ (10,193)		(10,193)		$ (8,339)
Parent Company [Member]
Foreign currency transaction [Abstract]
Beginning balance	(6,355)	$ (5,249)	(5,487)	$ (5,526)
Gains/(Losses) on foreign currency translation	(996)	(236)	(2,063)	112
Less: Tax/(Tax benefit) (a)	36	66	5	133
Net gains/(losses) on foreign currency translation	(1,032)	(302)	(2,068)	(21)
(Gains)/Losses reclassified from AOCI to income	80	0	248	(4)
Other comprehensive income/(loss), net of tax (c)	(952)	(302)	(1,820)	(25)
Ending balance	(7,307)	(5,551)	(7,307)	(5,551)
Marketable securities [Abstract]
Beginning balance	(355)	81	(19)	156
Gains/(Losses) on available for sale securities	(199)	(26)	(647)	(112)
Less: Tax/(Tax benefit)	(47)	(6)	(153)	(28)
Net gains/(losses) on available for sale securities	(152)	(20)	(494)	(84)
(Gains)/Losses reclassified from AOCI to net income	5	(3)	13	(18)
Less: Tax/(Tax benefit)	1	0	3	(4)
Net (gains)/losses reclassified from AOCI to net income	4	(3)	10	(14)
Other comprehensive income/(loss), net of tax	(148)	(23)	(484)	(98)
Ending balance	(503)	58	(503)	58
Derivative instruments [Abstract]
Beginning balance	(143)	(455)	(193)	(266)
Gains/(losses) on derivative instruments	445	339	475	(52)
Less: Tax/(tax benefit)	105	85	112	8
Net gains/(losses) on derivative instruments	340	254	363	(60)
(Gains)/Losses reclassified from AOCI to net income	35	111	73	271
Less: Tax/(tax benefit)	8	22	19	57
Net (gains)/losses reclassified to AOCI from net income	27	89	54	214
Other comprehensive income/(loss), net of tax	367	343	417	154
Ending balance	224	(112)	224	(112)
Pension and other postretirement benefits
Beginning balance	(2,620)	(2,645)	(2,640)	(2,658)
Amortization of prior service costs/(credits)	5	4	17	24
Less: Tax/(Tax benefit)	1	4	4	8
Net prior service costs/(credits) reclassified from AOCI to net income	4	0	13	16
Translation impact on non-U.S. plans	9	5	20	2
Other comprehensive income/(loss), net of tax	13	5	33	18
Ending balance	(2,607)	(2,640)	(2,607)	(2,640)
Total AOCI ending balance at September 30	(10,193)	$ (8,245)	(10,193)	$ (8,245)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	$ 3		$ (1)