Stockholders' Equity - 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), Net of Tax [Roll Forward]
AOCI beginning balance	$ 374
Other comprehensive income (loss), net of tax	(10,290)	$ (3,120)	$ 2,346
AOCI ending balance	(9,916)	374
Securities available for sale | Available-for-sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI beginning balance	297	2,186	935
Other comprehensive income (loss) before reclassifications	(7,980)	(1,887)	1,278
Amounts reclassified from AOCI into earnings	7	(2)	(19)
Other comprehensive income (loss), net of tax	(7,973)	(1,889)	1,259
AOCI ending balance	(7,676)	297	2,186
Securities available for sale | Available-for-sale securities | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications			(8)
Hedging Relationships
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI beginning balance	118	1,362	354
Other comprehensive income (loss) before reclassifications	(2,404)	(396)	1,401
Amounts reclassified from AOCI into earnings	104	(848)	(393)
Other comprehensive income (loss), net of tax	(2,300)	(1,244)	1,008
AOCI ending balance	(2,182)	118	1,362
Hedging Relationships | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications			0
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI beginning balance	(21)	(31)	(107)
Other comprehensive income (loss) before reclassifications	1	10	76
Amounts reclassified from AOCI into earnings	0	0	0
Other comprehensive income (loss), net of tax	1	10	76
AOCI ending balance	(20)	(21)	(31)
Foreign Currency Translation Adjustments | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications			0
Other
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI beginning balance	(20)	(23)	(26)
Other comprehensive income (loss) before reclassifications	(17)	7	5
Amounts reclassified from AOCI into earnings	(1)	(4)	(2)
Other comprehensive income (loss), net of tax	(18)	3	3
AOCI ending balance	(38)	(20)	(23)
Other | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications			0
Total
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI beginning balance	374	3,494	1,156
Other comprehensive income (loss) before reclassifications	(10,400)	(2,266)	2,760
Amounts reclassified from AOCI into earnings	110	(854)	(414)
Other comprehensive income (loss), net of tax	(10,290)	(3,120)	2,346
AOCI ending balance	(9,916)	374	3,494
Total | Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive income (loss) before reclassifications			(8)
Net investment hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other comprehensive gain (loss)	$ 305	$ 22	$ (65)