Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Accumulated other comprehensive income/(loss) (Note 23)	$ (9,042)	$ (9,339)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	1	(4)	$ 4
Derivative instruments
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	(151)
Parent Company [Member]
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Accumulated other comprehensive income/(loss) (Note 23)	(9,042)	(9,339)	(8,339)
Foreign currency translation
Beginning balance	(6,416)	(5,487)	(5,526)
Gains/(Losses) on foreign currency translation	967	(1,199)	200
Less: Tax/(Tax benefit) (a)	(10)	(2)	143
Net gains/(losses) on foreign currency translation	977	(1,197)	57
(Gains)/Losses reclassified from AOCI to net income (b)	(4)	268	(18)
Other comprehensive income/(loss), net of tax (c)	973	(929)	39
Ending balance	(5,443)	(6,416)	(5,487)
Marketable securities
Beginning balance	(442)	(19)	156
Gains/(Losses) on available for sale securities	326	(576)	(209)
Less: Tax/(Tax benefit)	80	(139)	(52)
Net gains/(losses) on available for sale securities	246	(437)	(157)
(Gains)/Losses reclassified from AOCI to net income	35	19	(23)
Less: Tax/(Tax benefit)	9	5	(5)
Net (gains)/losses reclassified from AOCI to net income (b)	26	14	(18)
Other comprehensive income/(loss), net of tax	272	(423)	(175)
Ending balance	(170)	(442)	(19)
Derivative instruments
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	129	(193)	(266)
Gains/(Losses) on derivative instruments	(519)	346	(169)
Less: Tax/(Tax benefit)	(126)	83	(20)
Net gains/(losses) on derivative instruments	(393)	263	(149)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	(83)	80	280
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(16)	21	58
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(67)	59	222
Other comprehensive income/(loss), net of tax	(460)	322	73
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	(331)	129	(193)
Pension and other postretirement benefits
Beginning balance	(2,610)	(2,640)	(2,658)
Prior service (costs)/credits arising during the period (e)	(659)	0	0
Less: Tax/(Tax benefit)	(157)	0	0
Net prior service (costs)/credits arising during the period	(502)	0	0
Amortization and recognition of prior service costs/(credits) (f)	25	21	27
Less: Tax/(Tax benefit)	6	4	6
Net prior service costs/(credits) reclassified from AOCI to net income	19	17	21
Translation impact on non-U.S. plans	(5)	13	(3)
Other comprehensive income/(loss), net of tax	(488)	30	18
Ending balance	$ (3,098)	$ (2,610)	$ (2,640)