Fair Value - Schedule of Fair Value Measurements, Assets, Using Significant Unobservable Inputs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	$ 16	$ 2,756
Total realized and unrealized gain (losses) recorded in revenue	(3)	(6)
Total realized and unrealized gain (losses) recorded in other comprehensive income	0	27
Purchases	107	870
Sales	0	(95)
Settlements	0	(83)
Transfers into Level 3	15	50
Transfers out of Level 3	(135)	(3,503)
Fair value, end of period	0	16
Change in unrealized gains (losses) related to financial instruments held	(1)	(3)
Derivative instruments, assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	2	4
Total realized and unrealized gain (losses) recorded in revenue	(3)	(6)
Total realized and unrealized gain (losses) recorded in other comprehensive income	0	0
Purchases	1	5
Sales	0	0
Settlements	0	(1)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value, end of period	0	2
Change in unrealized gains (losses) related to financial instruments held	(1)	(3)
Foreign exchange contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	2	4
Total realized and unrealized gain (losses) recorded in revenue	(3)	(6)
Total realized and unrealized gain (losses) recorded in other comprehensive income	0	0
Purchases	1	5
Sales	0	0
Settlements	0	(1)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Fair value, end of period	0	2
Change in unrealized gains (losses) related to financial instruments held	(1)	(3)
Asset-backed securities, collateralized loan obligations
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	14	1,820
Total realized and unrealized gain (losses) recorded in revenue	0	0
Total realized and unrealized gain (losses) recorded in other comprehensive income	0	(10)
Purchases	106	864
Sales	0	(95)
Settlements	0	(77)
Transfers into Level 3	0	50
Transfers out of Level 3	(120)	(2,538)
Fair value, end of period	0	14
Asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	14	1,820
Total realized and unrealized gain (losses) recorded in revenue	0	0
Total realized and unrealized gain (losses) recorded in other comprehensive income	0	(10)
Purchases	106	864
Sales	0	(95)
Settlements	0	(77)
Transfers into Level 3	0	50
Transfers out of Level 3	(120)	(2,538)
Fair value, end of period	0	14
Other U.S. debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	0
Total realized and unrealized gain (losses) recorded in revenue	0
Total realized and unrealized gain (losses) recorded in other comprehensive income	0
Purchases	0
Sales	0
Settlements	0
Transfers into Level 3	15
Transfers out of Level 3	(15)
Fair value, end of period	0	0
Non-U.S. debt securities, asset-backed securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	0	887
Total realized and unrealized gain (losses) recorded in revenue		0
Total realized and unrealized gain (losses) recorded in other comprehensive income		35
Purchases		1
Sales		0
Settlements		(5)
Transfers into Level 3		0
Transfers out of Level 3		(918)
Fair value, end of period		0
Non-U.S. debt securities, other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	0	45
Total realized and unrealized gain (losses) recorded in revenue		0
Total realized and unrealized gain (losses) recorded in other comprehensive income		2
Purchases		0
Sales		0
Settlements		0
Transfers into Level 3		0
Transfers out of Level 3		(47)
Fair value, end of period		0
Total non-U.S. debt securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	0	932
Total realized and unrealized gain (losses) recorded in revenue		0
Total realized and unrealized gain (losses) recorded in other comprehensive income		37
Purchases		1
Sales		0
Settlements		(5)
Transfers into Level 3		0
Transfers out of Level 3		(965)
Fair value, end of period		0
Investment securities available-for-sale
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value, beginning of period	14	2,752
Total realized and unrealized gain (losses) recorded in revenue	0	0
Total realized and unrealized gain (losses) recorded in other comprehensive income	0	27
Purchases	106	865
Sales	0	(95)
Settlements	0	(82)
Transfers into Level 3	15	50
Transfers out of Level 3	(135)	(3,503)
Fair value, end of period	$ 0	$ 14