Borrowings - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Federal Reserve Discount Window
Debt Instrument [Line Items]
Remaining undrawn capacity	$ 13,000	$ 10,000
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Remaining undrawn capacity	2,600	2,600
Variable Interest Entity, Primary Beneficiary \| Committed Capacity
Debt Instrument [Line Items]
Remaining undrawn capacity	2,100	2,100
Variable Interest Entity, Primary Beneficiary \| Uncommitted Capacity
Debt Instrument [Line Items]
Remaining undrawn capacity	$ 450	$ 450

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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+ Details