Shareholders' Equity - Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 27,363	$ 26,200	$ 24,431
Other comprehensive income (loss) before reclassifications	(2,700)	(1,255)	1,106
Increase (decrease) due to amounts reclassified from accumulated other comprehensive income	122	(65)	(43)
Other comprehensive income (loss)	(2,578)	(1,320)	1,063
Ending balance	25,191	27,363	26,200
Unrecognized gain (loss) in AOCI	(749)	31	55
Net Unrealized Gains (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(2)	57	(70)
Other comprehensive income (loss) before reclassifications	(321)	11	179
Increase (decrease) due to amounts reclassified from accumulated other comprehensive income	(36)	(70)	(52)
Other comprehensive income (loss)	(357)	(59)	127
Ending balance	(359)	(2)	57
Net Unrealized Gains (Losses) on Investment Securities(1)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(50)	846	407
Other comprehensive income (loss) before reclassifications	(1,937)	(854)	439
Increase (decrease) due to amounts reclassified from accumulated other comprehensive income	170	(42)	0
Other comprehensive income (loss)	(1,767)	(896)	439
Ending balance	(1,817)	(50)	846
Net Unrealized Losses on Retirement Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(130)	(178)	(187)
Other comprehensive income (loss) before reclassifications	(1)	1	0
Increase (decrease) due to amounts reclassified from accumulated other comprehensive income	(12)	47	9
Other comprehensive income (loss)	(13)	48	9
Ending balance	(143)	(130)	(178)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,019)	(334)	(1,072)
Other comprehensive income (loss) before reclassifications	(732)	(685)	738
Increase (decrease) due to amounts reclassified from accumulated other comprehensive income	0	0	0
Other comprehensive income (loss)	(732)	(685)	738
Ending balance	(1,751)	(1,019)	(334)
Net Unrealized Gains (Losses) on Hedges of Net Investments in Non-U.S. Subsidiaries
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	68	(204)	46
Other comprehensive income (loss) before reclassifications	291	272	(250)
Increase (decrease) due to amounts reclassified from accumulated other comprehensive income	0	0	0
Other comprehensive income (loss)	291	272	(250)
Ending balance	359	68	(204)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(1,133)	187	(876)
Other comprehensive income (loss)	(2,578)	(1,320)	1,063
Ending balance	$ (3,711)	$ (1,133)	$ 187

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount, after tax and before adjustment, of unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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