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Credit Quality and the Allowance for Loan and Lease Losses - Summary of Gross Charge-Offs Within the Commercial Portfolio Segments, by Class and Vintage (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Financing Receivable, Modifications |  |
Total | $ 173 | $ 146
Commercial |  |
Financing Receivable, Modifications |  |
Year One | 0 | 0
Year Two | 6 | 1
Year Three | 4 | 2
Year Four | 1 | 0
Year Five | 0 | 0
Prior | 13 | 0
Revolving Loans | 43 | 37
Total | 67 | 40
Commercial | Commercial and industrial loans |  |
Financing Receivable, Modifications |  |
Year One | 0 | 0
Year Two | 6 | 1
Year Three | 4 | 2
Year Four | 1 | 0
Year Five | 0 | 0
Prior | 0 | 0
Revolving Loans | 43 | 37
Total | 54 | 40
Commercial | Commercial mortgage owner-occupied loans |  |
Financing Receivable, Modifications |  |
Year One | 0 | 0
Year Two | 0 | 0
Year Three | 0 | 0
Year Four | 0 | 0
Year Five | 0 | 0
Prior | 11 | 0
Revolving Loans | 0 | 0
Total | 11 | 0
Commercial | Commercial leases |  |
Financing Receivable, Modifications |  |
Year One | 0 | 0
Year Two | 0 | 0
Year Three | 0 | 0
Year Four | 0 | 0
Year Five | 0 | 0
Prior | 2 | 0
Revolving Loans | 0 | 0
Total | $ 2 | $ 0

X
- 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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- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated more than five years before current fiscal year. 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 + Details
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- Definition Amount, excluding accrued interest, of writeoff of financing receivable originated three years before current fiscal year. 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 + Details
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