Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Accumulated other comprehensive income/(loss) (Note 23)	$ (9,339)	$ (8,339)
Derivative instruments
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	(160)
Parent Company [Member]
Accumulated Other Comprehensive Income/(Loss) [Line Items]
Accumulated other comprehensive income/(loss) (Note 23)	(9,339)	(8,339)	$ (8,294)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Noncontrolling Interest	(4)	4	(1)
Foreign currency translation
Beginning balance	(5,487)	(5,526)	(4,626)
Gains/(Losses) on foreign currency translation	(1,199)	200	(1,107)
Less: Tax/(Tax benefit) (a)	(2)	143	(206)
Net gains/(losses) on foreign currency translation	(1,197)	57	(901)
(Gains)/Losses reclassified from AOCI to net income (b)	268	(18)	1
Other comprehensive income/(loss), net of tax (c)	(929)	39	(900)
Ending balance	(6,416)	(5,487)	(5,526)
Marketable securities
Beginning balance	(19)	156	71
Gains/(Losses) on available for sale securities	(576)	(209)	155
Less: Tax/(Tax benefit)	(139)	(52)	37
Net gains/(losses) on available for sale securities	(437)	(157)	118
(Gains)/Losses reclassified from AOCI to net income	19	(23)	(45)
Less: Tax/(Tax benefit)	5	(5)	(12)
Net (gains)/losses reclassified from AOCI to net income	14	(18)	(33)
Other comprehensive income/(loss), net of tax	(423)	(175)	85
Ending balance	(442)	(19)	156
Derivative instruments
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	(193)	(266)	(488)
Gains/(Losses) on derivative instruments	346	(169)	207
Less: Tax/(Tax benefit)	83	(20)	39
Net gains/(losses) on derivative instruments	263	(149)	168
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	80	280	66
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	21	58	12
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	59	222	54
Other comprehensive income/(loss), net of tax	322	73	222
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	129	(193)	(266)
Pension and other postretirement benefits
Beginning balance	(2,640)	(2,658)	(2,685)
Prior service (costs)/credits arising during the period	0	0	(21)
Less: Tax/(Tax benefit)	0	0	(6)
Net prior service (costs)/credits arising during the period	0	0	(15)
Amortization and recognition of prior service costs/(credits) (e)	21	27	63
Less: Tax/(Tax benefit)	4	6	10
Net prior service costs/(credits) reclassified from AOCI to net income	17	21	53
Translation impact on non-U.S. plans	13	(3)	(11)
Other comprehensive income/(loss), net of tax	30	18	27
Ending balance	$ (2,610)	$ (2,640)	$ (2,658)