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Allowance for Credit Losses - Schedule Of Gross Charge Offs by Year of Origination (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Year one, current fiscal year charge offs | $ 13 |  |
Year two, current fiscal year charge offs | 19 |  |
Year three, current fiscal year charge offs | 82 |  |
Year four, current fiscal year charge offs | 5 |  |
Year five, current fiscal year charge offs | 12 |  |
Prior year charge offs | 54 |  |
Revolving loans charge offs | 14 |  |
Total charge offs | 199 | $ 93 | $ 59
Commercial | C&I |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Year one, current fiscal year charge offs | 1 |  |
Year two, current fiscal year charge offs | 17 |  |
Year three, current fiscal year charge offs | 82 |  |
Year four, current fiscal year charge offs | 5 |  |
Year five, current fiscal year charge offs | 10 |  |
Prior year charge offs | 34 |  |
Revolving loans charge offs | 7 |  |
Total charge offs | 156 | 62 | 34
Commercial | Commercial real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Year one, current fiscal year charge offs | 0 |  |
Year two, current fiscal year charge offs | 0 |  |
Year three, current fiscal year charge offs | 0 |  |
Year four, current fiscal year charge offs | 0 |  |
Year five, current fiscal year charge offs | 2 |  |
Prior year charge offs | 15 |  |
Revolving loans charge offs | 0 |  |
Total charge offs | 17 | 1 | 5
Consumer | Consumer real estate |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Year one, current fiscal year charge offs | 0 |  |
Year two, current fiscal year charge offs | 1 |  |
Year three, current fiscal year charge offs | 0 |  |
Year four, current fiscal year charge offs | 0 |  |
Year five, current fiscal year charge offs | 0 |  |
Prior year charge offs | 3 |  |
Revolving loans charge offs | 0 |  |
Total charge offs | 4 | 5 | 5
Consumer | Credit card and other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Year one, current fiscal year charge offs | 12 |  |
Year two, current fiscal year charge offs | 1 |  |
Year three, current fiscal year charge offs | 0 |  |
Year four, current fiscal year charge offs | 0 |  |
Year five, current fiscal year charge offs | 0 |  |
Prior year charge offs | 2 |  |
Revolving loans charge offs | 7 |  |
Total charge offs | $ 22 | $ 25 | $ 15

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- Definition Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-6 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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