Fair Value Disclosures - Fair Value Option (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Fair Value Disclosures
Loans Receivable, Fair Value Disclosure	$ 12	$ 13
Loans Held for Sale, Fair Value	1,105	1,233
Interest-Bearing Domestic Deposit, Brokered	396	192
UPB	1,084	1,232
Deposits, Principal Outstanding	399	195
Difference	21	1
Fair Value Option, Aggregate Difference, Deposits	(3)	(3)
Trading loans
Fair Value Disclosures
Trading Loans, Fair Value	2,184	1,671
UPB	2,240	1,697
Difference	(56)	(26)
Loans and leases
Fair Value Disclosures
UPB	13	14
Difference	$ (1)	$ (1)

Deposits, Principal Outstanding

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Fair Value Option, Aggregate Difference, Deposits

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Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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This item represents the difference between the aggregate fair value and the aggregate unpaid principal balance of loans and long-term receivables (other than securities categorized as trading, available-for-sale or held-to-maturity) that have contractual principal amounts and for which the fair value option has been elected.

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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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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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This is the principal amount outstanding for loans which are in the process of being securitized as of the date of the statement of financial position (across all types of loans).

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Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading).

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