Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivative instruments [Abstract]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ (139)
Pension and other postretirement benefits
Total AOCI ending balance at June 30	$ (8,924)		(8,924)		$ (9,339)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	4	$ (4)	4	$ (4)
Parent Company [Member]
Foreign currency transaction [Abstract]
Beginning balance	(5,923)	(5,341)	(6,416)	(5,487)
Gains/(Losses) on foreign currency translation	276	(996)	761	(1,067)
Less: Tax/(Tax benefit) (a)	0	65	(10)	(31)
Net gains/(losses) on foreign currency translation	276	(1,061)	771	(1,036)
(Gains)/Losses reclassified from AOCI to income	(2)	47	(4)	168
Other comprehensive income/(loss), net of tax (c)	274	(1,014)	767	(868)
Ending balance	(5,649)	(6,355)	(5,649)	(6,355)
Marketable securities [Abstract]
Beginning balance	(332)	(272)	(442)	(19)
Gains/(Losses) on available for sale securities	(67)	(118)	68	(448)
Less: Tax/(Tax benefit)	(16)	(29)	17	(106)
Net gains/(losses) on available for sale securities	(51)	(89)	51	(342)
(Gains)/Losses reclassified from AOCI to net income	9	8	20	8
Less: Tax/(Tax benefit)	2	2	5	2
Net (gains)/losses reclassified from AOCI to net income	7	6	15	6
Other comprehensive income/(loss), net of tax	(44)	(83)	66	(336)
Ending balance	(376)	(355)	(376)	(355)
Derivative instruments [Abstract]
Beginning balance	74	(49)	129	(193)
Gains/(losses) on derivative instruments	(436)	(126)	(491)	30
Less: Tax/(tax benefit)	(113)	(30)	(127)	7
Net gains/(losses) on derivative instruments	(323)	(96)	(364)	23
(Gains)/Losses reclassified from AOCI to net income	(49)	6	(66)	38
Less: Tax/(tax benefit)	(3)	4	(6)	11
Net (gains)/losses reclassified to AOCI from net income	(46)	2	(60)	27
Other comprehensive income/(loss), net of tax	(369)	(94)	(424)	50
Ending balance	(295)	(143)	(295)	(143)
Pension and other postretirement benefits
Beginning balance	(2,607)	(2,632)	(2,610)	(2,640)
Amortization of prior service costs/(credits)	6	6	12	12
Less: Tax/(Tax benefit)	2	2	3	3
Net prior service costs/(credits) reclassified from AOCI to net income	4	4	9	9
Translation impact on non-U.S. plans	(1)	8	(3)	11
Other comprehensive income/(loss), net of tax	3	12	6	20
Ending balance	(2,604)	(2,620)	(2,604)	(2,620)
Total AOCI ending balance at June 30	$ (8,924)	$ (9,473)	$ (8,924)	$ (9,473)