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Fair Value Measures - Financial Instruments Carried at Fair Value (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Assets: |  |
Total debt securities available for sale | $ 8,723 | $ 9,060
Total securities | 8,736 | 9,074
Loans held-for-sale | 1,325 | 1,115
Mortgage servicing rights | 1,135 | 1,033
Acquisition, development, and construction |  |
Assets: |  |
Loans held-for-sale | 168 |
Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | 174 |
Total debt securities available for sale |  |
Assets: |  |
Total debt securities available for sale | 8,723 | 9,060
Total mortgage-related debt securities |  |
Assets: |  |
Total debt securities available for sale | 5,689 | 4,789
Total mortgage-related debt securities | GSE certificates |  |
Assets: |  |
Total debt securities available for sale | 1,164 | 1,297
Total mortgage-related debt securities | GSE CMOs |  |
Assets: |  |
Total debt securities available for sale | 4,351 | 3,301
Total mortgage-related debt securities | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | 174 | 191
Total other debt securities |  |
Assets: |  |
Total debt securities available for sale | 3,034 | 4,271
Total other debt securities | U. S. Treasury obligations |  |
Assets: |  |
Total debt securities available for sale | 195 | 1,487
Total other debt securities | GSE debentures |  |
Assets: |  |
Total debt securities available for sale | 1,659 | 1,398
Total other debt securities | Asset-backed securities |  |
Assets: |  |
Total debt securities available for sale | 313 | 361
Total other debt securities | Municipal bonds |  |
Assets: |  |
Total debt securities available for sale | 6 | 30
Total other debt securities | Corporate bonds |  |
Assets: |  |
Total debt securities available for sale | 737 | 885
Total other debt securities | Foreign notes |  |
Assets: |  |
Total debt securities available for sale | 33 | 20
Total other debt securities | Capital trust notes |  |
Assets: |  |
Total debt securities available for sale | 91 | 90
Recurring |  |
Assets: |  |
Total securities | 8,736 | 9,074
Mortgage servicing rights | 1,135 | 1,033
Total assets at fair value | 11,380 | 11,451
Liabilities: |  |
Total liabilities at fair value | 107 | 136
Recurring | Commercial and industrial |  |
Assets: |  |
Loans held-for-sale | 9 |
Recurring | Mortgage Loans: | Residential first mortgage loans |  |
Assets: |  |
Loans held-for-sale | 1,148 | 1,115
Recurring | Interest rate swaps and swaptions |  |
Assets: |  |
Derivative assets | 140 | 182
Liabilities: |  |
Derivative liabilities | 79 | 65
Recurring | Futures |  |
Assets: |  |
Derivative assets | 1 | 2
Recurring | Rate lock commitments |  |
Assets: |  |
Derivative assets | 6 | 9
Liabilities: |  |
Derivative liabilities | 12 | 10
Recurring | Mortgage-backed securities forwards |  |
Assets: |  |
Derivative assets | 37 | 36
Liabilities: |  |
Derivative liabilities | 16 | 61
Recurring | Total debt securities available for sale |  |
Assets: |  |
Total debt securities available for sale | 8,723 | 9,060
Recurring | Total mortgage-related debt securities |  |
Assets: |  |
Total debt securities available for sale | 5,689 | 4,789
Recurring | Total mortgage-related debt securities | GSE certificates |  |
Assets: |  |
Total debt securities available for sale | 1,164 | 1,297
Recurring | Total mortgage-related debt securities | GSE CMOs |  |
Assets: |  |
Total debt securities available for sale | 4,351 | 3,301
Recurring | Total mortgage-related debt securities | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | 174 | 191
Recurring | Total other debt securities |  |
Assets: |  |
Total debt securities available for sale | 3,034 | 4,271
Recurring | Total other debt securities | U. S. Treasury obligations |  |
Assets: |  |
Total debt securities available for sale | 195 | 1,487
Recurring | Total other debt securities | GSE debentures |  |
Assets: |  |
Total debt securities available for sale | 1,659 | 1,398
Recurring | Total other debt securities | Asset-backed securities |  |
Assets: |  |
Total debt securities available for sale | 313 | 361
Recurring | Total other debt securities | Municipal bonds |  |
Assets: |  |
Total debt securities available for sale | 6 | 30
Recurring | Total other debt securities | Corporate bonds |  |
Assets: |  |
Total debt securities available for sale | 737 | 885
Recurring | Total other debt securities | Foreign notes |  |
Assets: |  |
Total debt securities available for sale | 33 | 20
Recurring | Total other debt securities | Capital trust notes |  |
Assets: |  |
Total debt securities available for sale | 91 | 90
Recurring | Total equity securities |  |
Assets: |  |
Total equity securities | 13 | 14
Recurring | Total equity securities | Mutual funds and common stock |  |
Assets: |  |
Total equity securities | 13 | 14
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets: |  |
Total securities | 195 | 1,487
Mortgage servicing rights | 0 | 0
Total assets at fair value | 195 | 1,487
Liabilities: |  |
Total liabilities at fair value | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Acquisition, development, and construction |  |
Assets: |  |
Loans held-for-sale | 0 |
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Commercial and industrial |  |
Assets: |  |
Loans held-for-sale | 0 |
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage Loans: | Residential first mortgage loans |  |
Assets: |  |
Loans held-for-sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps and swaptions |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Futures |  |
Assets: |  |
Derivative assets | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Rate lock commitments |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Mortgage-backed securities forwards |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total debt securities available for sale |  |
Assets: |  |
Total debt securities available for sale | 195 | 1,487
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total mortgage-related debt securities |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total mortgage-related debt securities | GSE certificates |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total mortgage-related debt securities | GSE CMOs |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total mortgage-related debt securities | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities |  |
Assets: |  |
Total debt securities available for sale | 195 | 1,487
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | U. S. Treasury obligations |  |
Assets: |  |
Total debt securities available for sale | 195 | 1,487
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | GSE debentures |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | Asset-backed securities |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | Municipal bonds |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | Corporate bonds |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | Foreign notes |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total other debt securities | Capital trust notes |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total equity securities |  |
Assets: |  |
Total equity securities | 0 | 0
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) | Total equity securities | Mutual funds and common stock |  |
Assets: |  |
Total equity securities | 0 | 0
Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets: |  |
Total securities | 8,509 | 7,587
Mortgage servicing rights | 0 | 0
Total assets at fair value | 10,012 | 8,922
Liabilities: |  |
Total liabilities at fair value | 95 | 126
Recurring | Significant Other Observable Inputs (Level 2) | Acquisition, development, and construction |  |
Assets: |  |
Loans held-for-sale | 168 |
Recurring | Significant Other Observable Inputs (Level 2) | Commercial and industrial |  |
Assets: |  |
Loans held-for-sale | 9 |
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage Loans: | Residential first mortgage loans |  |
Assets: |  |
Loans held-for-sale | 1,148 | 1,115
Recurring | Significant Other Observable Inputs (Level 2) | Interest rate swaps and swaptions |  |
Assets: |  |
Derivative assets | 140 | 182
Liabilities: |  |
Derivative liabilities | 79 | 65
Recurring | Significant Other Observable Inputs (Level 2) | Futures |  |
Assets: |  |
Derivative assets | 1 | 2
Recurring | Significant Other Observable Inputs (Level 2) | Rate lock commitments |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Recurring | Significant Other Observable Inputs (Level 2) | Mortgage-backed securities forwards |  |
Assets: |  |
Derivative assets | 37 | 36
Liabilities: |  |
Derivative liabilities | 16 | 61
Recurring | Significant Other Observable Inputs (Level 2) | Total debt securities available for sale |  |
Assets: |  |
Total debt securities available for sale | 8,496 | 7,573
Recurring | Significant Other Observable Inputs (Level 2) | Total mortgage-related debt securities |  |
Assets: |  |
Total debt securities available for sale | 5,657 | 4,789
Recurring | Significant Other Observable Inputs (Level 2) | Total mortgage-related debt securities | GSE certificates |  |
Assets: |  |
Total debt securities available for sale | 1,164 | 1,297
Recurring | Significant Other Observable Inputs (Level 2) | Total mortgage-related debt securities | GSE CMOs |  |
Assets: |  |
Total debt securities available for sale | 4,351 | 3,301
Recurring | Significant Other Observable Inputs (Level 2) | Total mortgage-related debt securities | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | 142 | 191
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities |  |
Assets: |  |
Total debt securities available for sale | 2,839 | 2,784
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | U. S. Treasury obligations |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | GSE debentures |  |
Assets: |  |
Total debt securities available for sale | 1,659 | 1,398
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | Asset-backed securities |  |
Assets: |  |
Total debt securities available for sale | 313 | 361
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | Municipal bonds |  |
Assets: |  |
Total debt securities available for sale | 6 | 30
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | Corporate bonds |  |
Assets: |  |
Total debt securities available for sale | 737 | 885
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | Foreign notes |  |
Assets: |  |
Total debt securities available for sale | 33 | 20
Recurring | Significant Other Observable Inputs (Level 2) | Total other debt securities | Capital trust notes |  |
Assets: |  |
Total debt securities available for sale | 91 | 90
Recurring | Significant Other Observable Inputs (Level 2) | Total equity securities |  |
Assets: |  |
Total equity securities | 13 | 14
Recurring | Significant Other Observable Inputs (Level 2) | Total equity securities | Mutual funds and common stock |  |
Assets: |  |
Total equity securities | 13 | 14
Recurring | Significant Unobservable Inputs (Level 3) |  |
Assets: |  |
Total securities | 32 | 0
Mortgage servicing rights | 1,135 | 1,033
Total assets at fair value | 1,173 | 1,042
Liabilities: |  |
Total liabilities at fair value | 12 | 10
Recurring | Significant Unobservable Inputs (Level 3) | Acquisition, development, and construction |  |
Assets: |  |
Loans held-for-sale | 0 |
Recurring | Significant Unobservable Inputs (Level 3) | Commercial and industrial |  |
Assets: |  |
Loans held-for-sale | 0 |
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage Loans: | Residential first mortgage loans |  |
Assets: |  |
Loans held-for-sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Interest rate swaps and swaptions |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Futures |  |
Assets: |  |
Derivative assets | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Rate lock commitments |  |
Assets: |  |
Derivative assets | 6 | 9
Liabilities: |  |
Derivative liabilities | 12 | 10
Recurring | Significant Unobservable Inputs (Level 3) | Mortgage-backed securities forwards |  |
Assets: |  |
Derivative assets | 0 | 0
Liabilities: |  |
Derivative liabilities | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total debt securities available for sale |  |
Assets: |  |
Total debt securities available for sale | 32 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total mortgage-related debt securities |  |
Assets: |  |
Total debt securities available for sale | 32 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total mortgage-related debt securities | GSE certificates |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total mortgage-related debt securities | GSE CMOs |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total mortgage-related debt securities | Private Label CMOs |  |
Assets: |  |
Total debt securities available for sale | 32 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | U. S. Treasury obligations |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | GSE debentures |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | Asset-backed securities |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | Municipal bonds |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | Corporate bonds |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | Foreign notes |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total other debt securities | Capital trust notes |  |
Assets: |  |
Total debt securities available for sale | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total equity securities |  |
Assets: |  |
Total equity securities | 0 | 0
Recurring | Significant Unobservable Inputs (Level 3) | Total equity securities | Mutual funds and common stock |  |
Assets: |  |
Total equity securities | $ 0 | $ 0

X
- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-2 + Details
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481830/320-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479130/326-30-45-1 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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