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Loans and Leases - Composition of Loan and Lease Portfolio Held for Investment (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans | [1] | $ 69,001 |  | $ 45,738 |  |
Non-Covered Loans, Percentage | [1] | 100.00% |  | 100.00% |  |
Allowance for credit losses on loans and leases |  | $ (393) |  | $ (199) |  | $ (194)
Total loans and leases held for investment, net |  | 68,608 |  | 45,539 |  |
Loans held for sale, at fair value |  | 1,115 |  |  |  |
Total loans and leases, net |  | 69,723 |  | 45,539 |  |
Multi-Family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 38,130 |  | $ 34,628 |  |
Non-Covered Loans, Percentage |  | 55.30% |  | 75.70% |  |
Commercial Real Estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 8,526 |  | $ 6,701 |  |
Non-Covered Loans, Percentage |  | 12.40% |  | 14.70% |  |
One-to-Four Family |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 5,821 |  | $ 160 |  |
One-to-Four Family First Mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 5,821 |  | $ 160 |  |
Non-Covered Loans, Percentage |  | 8.40% |  | 0.30% |  |
Acquisition, Development, and Construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 1,996 |  | $ 209 |  |
Non-Covered Loans, Percentage |  | 2.80% |  | 0.50% |  |
Mortgage Receivable |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans | [1] | $ 54,473 |  | $ 41,698 |  |
Non-Covered Loans, Percentage | [1] | 78.90% |  | 91.20% |  |
Allowance for credit losses on loans and leases |  | $ (290) |  | $ (178) |  | $ (176)
Commercial and Industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans | [3] | $ 12,276 | [2] | $ 4,034 | [4] |
Non-Covered Loans, Percentage | [3] | 17.80% |  | 7.20% |  |
Commercial and Industrial | Other Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 10,597 |  | $ 2,238 |  |
Non-Covered Loans, Percentage |  | 15.40% |  | 3.20% |  |
Lease Financing, Unearned Income |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 1,679 |  | $ 1,796 |  |
Non-Covered Loans, Percentage |  | 2.40% |  | 3.90% |  |
Other |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 2,252 |  | $ 6 |  |
Non-Covered Loans, Percentage |  | 3.30% |  | 0.00% |  |
Total Other Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 14,528 |  | $ 4,040 |  |
Total Other Loans | Other Loans |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Non-Covered Loans |  | $ 14,528 |  | $ 4,040 |  |
Non-Covered Loans, Percentage |  | 21.10% |  | 7.20% |  |
[1] | Excludes accrued interest receivable of $292 million and $199 million at December 31, 2022 and December 31, 2021, respectively, which is included in other assets in the Consolidated Statements of Condition.
[2] | Includes lease financing receivables, all of which were classified as Pass.
[3] | Includes specialty finance loans and leases of $4.4 billion and $3.5 billion, respectively, at December 31, 2022 and December 31, 2021.
[4] | Includes lease financing receivables, all of which were classified as Pass.

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