Derivatives - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash payables	$ 601		$ 601		$ 380
Total trading revenues	22	$ 38	49	$ 99
Hedged amount of foreign currency denominated loans	14		14		9
Derivative assets	728		728		458
Derivative liability	899		899		929
Additional Derivative Agreements | Derivative Instruments With Adjustable Collateral Posting Thresholds
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds	6		6		5
Net fair value of derivative liabilities with adjustable posting thresholds	257		257		268
Collateral received	97		97		106
Securities posted collateral	125		125		61
Additional Derivative Agreements | Derivative Instruments With Accelerated Termination Provisions
Derivative Instruments, Gain (Loss) [Line Items]
Net fair value of derivative assets with adjustable posting thresholds	609		609		378
Net fair value of derivative liabilities with adjustable posting thresholds	257		257		268
Collateral received	669		669		479
Securities posted collateral	94		94		61
Credit Risk Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset, notional amount	326		326		242
Derivative liability, notional amount	881		881		742
Visa Class B Shares
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liabilities related to sale	34		34		27
Derivative valuation adjustment	15		15		22
Counterparties
Derivative Instruments, Gain (Loss) [Line Items]
Collateral cash receivables	531		531		159
Collateral cash payables	$ 28		$ 28		$ 42