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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 | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | $ 1,106 | $ 1,268 | $ 1,201 | $ 992 | $ 992
Charge-offs | (92) | (260) | (356) | (705) |
Recoveries | 19 | 21 | 51 | 35 |
Provision for (recovery of) credit losses on loans and leases | 38 | 235 | 175 | 942 |
Balance, end of period | 1,071 | 1,264 | 1,071 | 1,264 | 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 | 538 | 618 | 639 | 307 | 307
Charge-offs | (53) | (101) | (238) | (188) | (308)
Recoveries | 7 | 3 | 16 | 4 |
Provision for (recovery of) credit losses on loans and leases | 66 | 104 | 141 | 501 |
Balance, end of period | 558 | 624 | 558 | 624 | 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 | 318 | 371 | 304 | 402 | 402
Charge-offs | (19) | (114) | (41) | (415) | (466)
Recoveries | 1 | 6 | 8 | 6 |
Provision for (recovery of) credit losses on loans and leases | (45) | 79 | (16) | 349 |
Balance, end of period | 255 | 342 | 255 | 342 | 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 | 33 | 40 | 39 | 47 | 47
Charge-offs | (1) | (7) | (3) | (8) | (8)
Recoveries | 0 | 5 | 0 | 5 |
Provision for (recovery of) credit losses on loans and leases | 2 | 4 | (2) | (2) |
Balance, end of period | 34 | 42 | 34 | 42 | 39
Loans and leases held for investment: | Commercial and Industrial |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Charge-offs |  |  | (50) |  | (136)
Other |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 57 | 66 | 68 | 102 | 102
Charge-offs | (10) | (5) | (24) | (15) |
Recoveries | 3 | 2 | 9 | 4 |
Provision for (recovery of) credit losses on loans and leases | 17 | 6 | 14 | (22) |
Balance, end of period | 67 | 69 | 67 | 69 | 68
Other | Commercial and Industrial |  |  |  |  |
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward] |  |  |  |  |
Balance, beginning of period | 160 | 173 | 151 | 134 | 134
Charge-offs | (9) | (33) | (50) | (79) |
Recoveries | 8 | 5 | 18 | 16 |
Provision for (recovery of) credit losses on loans and leases | (2) | 42 | 38 | 116 |
Balance, end of period | $ 157 | $ 187 | $ 157 | $ 187 | $ 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 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 13 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-13 Reference 2: 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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