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Allowance for Credit Losses on Loans and Leases - Activity in the Allowance for Loan and Lease Losses (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Balance, beginning of period | $ 1,201 | $ 992 | $ 992
Charge-offs | (124) | (91) |
Recoveries | 9 | 10 |
Provision for (recovery of) credit losses on loans and leases | 82 | 304 |
Balance, end of period | 1,168 | 1,215 | 1,201
Loans and Leases Held for Investment: | Multi-family |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Balance, beginning of period | 639 | 307 | 307
Charge-offs | (80) | (11) | (308)
Recoveries | 0 | 1 |
Provision for (recovery of) credit losses on loans and leases | 50 | 172 |
Balance, end of period | 609 | 469 | 639
Loans and Leases Held for Investment: | Commercial real estate |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Balance, beginning of period | 304 | 402 | 402
Charge-offs | (2) | (64) | (466)
Recoveries | 0 | 0 |
Provision for (recovery of) credit losses on loans and leases | (13) | 144 |
Balance, end of period | 289 | 482 | 304
Loans and Leases Held for Investment: | One-to-four family first mortgage |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Balance, beginning of period | 39 | 47 | 47
Charge-offs | (1) | 0 | (8)
Recoveries | 0 | 0 |
Provision for (recovery of) credit losses on loans and leases | (1) | (5) |
Balance, end of period | 37 | 42 | 39
Loans and Leases Held for Investment: | Commercial and industrial |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Charge-offs | (34) |  | (136)
Other |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Balance, beginning of period | 68 | 105 | 105
Charge-offs | (7) | (5) |
Recoveries | 3 | 2 |
Provision for (recovery of) credit losses on loans and leases | 2 | (33) |
Balance, end of period | 66 | 69 | 68
Other | Commercial and industrial |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |
Balance, beginning of period | 151 | 131 | 131
Charge-offs | (34) | (11) |
Recoveries | 6 | 7 |
Provision for (recovery of) credit losses on loans and leases | 44 | 26 |
Balance, end of period | $ 167 | $ 153 | $ 151

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- Definition Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 + Details
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- Definition Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. 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 13 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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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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