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Derivatives - Derivatives Associated With Cash Flow Hedges and Mortgage Banking Hedges (Details) - Hedging Instruments And Hedged Items - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Cash Flow Hedges | Interest Rate Contract |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Variability in cash flows related to debt instruments (primarily loans) | $ 5,350 | $ 1,100
Cash Flow Hedges | Interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 5,350 | 1,100
Assets | 0 | 13
Liabilities | 71 | 0
Mortgage Banking Hedges | Interest Rate Lock |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 35 | 241
Assets | 0 | 4
Liabilities | 0 | 0
Mortgage Banking Hedges | Forward contracts written |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Notional | 61 | 404
Assets | 0 | 0
Liabilities | $ 0 | $ 0

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