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Borrowed Funds - Breakdown of Borrowed Funds (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Instrument |  |
Federal Home Loan Bank advances | $ 23,750 | $ 20,250
Total wholesale borrowings | 25,708 | 20,250
Junior subordinated debentures | 580 | 579
Subordinated notes | 439 | 438
Total borrowed funds | 26,727 | 21,267
Total wholesale borrowings |  |
Debt Instrument |  |
Total wholesale borrowings | 25,708 | 20,250
FHLB advances |  |
Debt Instrument |  |
Federal Home Loan Bank advances | 22,750 | 19,250
Federal Reserve Bank Advances |  |
Debt Instrument |  |
Fed funds purchased | 1,000 | 1,000
Repurchase agreements |  |
Debt Instrument |  |
Fed funds purchased | 1,958 | 0
Junior Subordinated Debt |  |
Debt Instrument |  |
Junior subordinated debentures | 580 | 579
Subordinated notes |  |
Debt Instrument |  |
Subordinated notes | $ 439 | $ 438

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