Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	$ (7,065)	$ (8,796)	$ (7,139)
Other Comprehensive Income (Loss), Net of Tax	74	181
Derivative instruments	(64)	332
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(222)	(37)	(253)	$ 59
Other Comprehensive Income (Loss), before Reclassifications, before Tax	30	(121)
Other Comprehensive Income (Loss), Tax	0	24
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	30	(97)
Other Comprehensive Income (Loss), Net of Tax	31	(96)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	1	1
Reclassification from AOCI, Current Period, Tax	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1	1
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(1,833)	(1,519)	(1,934)	(1,355)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	84	(165)
Other Comprehensive Income (Loss), Tax	2	13
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	86	(152)
Other Comprehensive Income (Loss), Net of Tax	101	(164)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	15	(12)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(4,871)	(7,225)	(4,877)	(7,334)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	2	2
Other Comprehensive Income (Loss), Net of Tax	6	109
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	3	157
Reclassification from AOCI, Current Period, Tax	1	(50)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	4	107
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss	(139)	(15)	$ (75)	$ (347)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(183)	420
Other Comprehensive Income (Loss), Tax	33	(56)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(150)	364
Derivative instruments	(64)	332
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	109	(34)
Reclassification from AOCI, Current Period, Tax	(23)	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 86	$ (32)