Commitments and Contingencies - Pledged Assets (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Pledged loans:	$ 318,796	$ 306,383
Asset Pledged as Collateral
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Pledged securities	36,759	48,058
Federal Reserve Bank Advances [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	80,374	72,040
Federal Reserve Bank Advances [Member] \| Asset Pledged as Collateral
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Pledged loans:	103,542	93,497
FHLB Advances
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity	30,417	31,411
FHLB Advances \| Asset Pledged as Collateral
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Pledged loans:	$ 73,185	$ 71,931

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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