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Borrowed Funds - Breakdown of borrowed funds (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Debt Disclosure [Abstract]
FHLB advances	$ 15,400	$ 20,325
Total wholesale borrowings	15,400	20,325
Junior subordinated debentures	577	575
Subordinated notes	435	432
Total borrowed funds	$ 16,412	$ 21,332

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Wholesale Debt

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Junior Subordinated Notes, which have a lower priority than senior instruments.

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Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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