Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Derivative instruments [Abstract]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ (105)
Pension and other postretirement benefits
Total AOCI ending balance at June 30	$ (9,473)		(9,473)		$ (8,339)
Parent Company [Member]
Foreign currency transaction [Abstract]
Beginning balance	(5,341)	$ (5,237)	(5,487)	$ (5,526)
Gains/(Losses) on foreign currency translation	(996)	(46)	(1,067)	348
Less: Tax/(Tax benefit) (a)	65	(30)	(31)	67
Net gains/(losses) on foreign currency translation	(1,061)	(16)	(1,036)	281
(Gains)/Losses reclassified from AOCI to income	47	4	168	(4)
Other comprehensive income/(loss), net of tax (c)	(1,014)	(12)	(868)	277
Ending balance	(6,355)	(5,249)	(6,355)	(5,249)
Marketable securities [Abstract]
Beginning balance	(272)	91	(19)	156
Gains/(Losses) on available for sale securities	(118)	(10)	(448)	(86)
Less: Tax/(Tax benefit)	(29)	(3)	(106)	(22)
Net gains/(losses) on available for sale securities	(89)	(7)	(342)	(64)
(Gains)/Losses reclassified from AOCI to net income	8	(4)	8	(15)
Less: Tax/(Tax benefit)	2	(1)	2	(4)
Net (gains)/losses reclassified from AOCI to net income	6	(3)	6	(11)
Other comprehensive income/(loss), net of tax	(83)	(10)	(336)	(75)
Ending balance	(355)	81	(355)	81
Derivative instruments [Abstract]
Beginning balance	(49)	(567)	(193)	(266)
Gains/(losses) on derivative instruments	(126)	(10)	30	(391)
Less: Tax/(tax benefit)	(30)	(3)	7	(77)
Net gains/(losses) on derivative instruments	(96)	(7)	23	(314)
(Gains)/Losses reclassified from AOCI to net income	6	153	38	160
Less: Tax/(tax benefit)	4	34	11	35
Net (gains)/losses reclassified to AOCI from net income	2	119	27	125
Other comprehensive income/(loss), net of tax	(94)	112	50	(189)
Ending balance	(143)	(455)	(143)	(455)
Pension and other postretirement benefits
Beginning balance	(2,632)	(2,657)	(2,640)	(2,658)
Amortization of prior service costs/(credits)	6	17	12	20
Less: Tax/(Tax benefit)	2	3	3	4
Net prior service costs/(credits) reclassified from AOCI to net income	4	14	9	16
Translation impact on non-U.S. plans	8	(2)	11	(3)
Other comprehensive income/(loss), net of tax	12	12	20	13
Ending balance	(2,620)	(2,645)	(2,620)	(2,645)
Total AOCI ending balance at June 30	$ (9,473)	$ (8,268)	(9,473)	$ (8,268)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			$ (4)