Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Derivative instruments [Abstract]
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months			$ 13
Pension and other postretirement benefits
Total AOCI ending balance at June 30	$ (9,357)		(9,357)		$ (9,042)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest			(1)	$ 4
Parent Company [Member]
Foreign currency transaction [Abstract]
Beginning balance	(5,557)	$ (5,923)	(5,443)	(6,416)
Gains/(Losses) on foreign currency translation	(496)	276	(614)	761
Less: Tax/(Tax benefit) (a)	23	0	19	(10)
Net gains/(losses) on foreign currency translation	(519)	276	(633)	771
(Gains)/Losses reclassified from AOCI to income	(1)	(2)	(1)	(4)
Other comprehensive income/(loss), net of tax (c)	(520)	274	(634)	767
Ending balance	(6,077)	(5,649)	(6,077)	(5,649)
Marketable securities [Abstract]
Beginning balance	(178)	(332)	(170)	(442)
Gains/(Losses) on available for sale securities	30	(67)	15	68
Less: Tax/(Tax benefit)	5	(16)	3	17
Net gains/(losses) on available for sale securities	25	(51)	12	51
(Gains)/Losses reclassified from AOCI to net income	5	9	11	20
Less: Tax/(Tax benefit)	2	2	3	5
Net (gains)/losses reclassified from AOCI to net income (b)	3	7	8	15
Other comprehensive income/(loss), net of tax	28	(44)	20	66
Ending balance	(150)	(376)	(150)	(376)
Derivative instruments [Abstract]
Beginning balance	(126)	74	(331)	129
Gains/(losses) on derivative instruments	103	(436)	359	(491)
Less: Tax/(tax benefit)	24	(113)	84	(127)
Net gains/(losses) on derivative instruments	79	(323)	275	(364)
(Gains)/Losses reclassified from AOCI to net income	(47)	(49)	(35)	(66)
Less: Tax/(tax benefit)	(11)	(3)	(8)	(6)
Net (gains)/losses reclassified to AOCI from net income	(36)	(46)	(27)	(60)
Other comprehensive income/(loss), net of tax	43	(369)	248	(424)
Ending balance	(83)	(295)	(83)	(295)
Pension and other postretirement benefits
Beginning balance	(3,071)	(2,607)	(3,098)	(2,610)
Amortization of prior service costs/(credits)	33	6	64	12
Less: Tax/(Tax benefit)	7	2	15	3
Net prior service costs/(credits) reclassified from AOCI to net income	26	4	49	9
Translation impact on non-U.S. plans	(2)	(1)	2	(3)
Other comprehensive income/(loss), net of tax	24	3	51	6
Ending balance	(3,047)	(2,604)	(3,047)	(2,604)
Total AOCI ending balance at June 30	$ (9,357)	$ (8,924)	$ (9,357)	$ (8,924)