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Loans and Leases - Quality of Loans Held for Investment (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	$ 62,661	$ 68,272
Non-Accrual Loans	3,241	2,615
Current
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	58,885	64,692
Loans 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	535	965
Loans and leases held for investment: | Multi-family
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	30,466	34,093
Non-Accrual Loans	2,440	1,755
Loans and leases held for investment: | Multi-family | Current
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	27,682	31,589
Loans and leases held for investment: | Multi-family | Loans 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	344	749
Loans and leases held for investment: | Commercial real estate
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	10,163	11,836
Non-Accrual Loans	551	564
Loans and leases held for investment: | Commercial real estate | Current
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	9,495	11,202
Loans and leases held for investment: | Commercial real estate | Loans 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	117	70
Loans and leases held for investment: | One-to-four family first mortgage
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	5,513	5,201
Non-Accrual Loans	70	70
Loans and leases held for investment: | One-to-four family first mortgage | Current
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	5,424	5,106
Loans and leases held for investment: | One-to-four family first mortgage | Loans 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	19	25
Other loans held for investment | Commercial and industrial loans and lease financing
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	14,874	15,376
Non-Accrual Loans	154	202
Other loans held for investment | Commercial and industrial loans and lease financing | Current
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	14,686	15,064
Other loans held for investment | Commercial and industrial loans and lease financing | Loans 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	34	110
Other loans held for investment | Other loan commitments
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	1,645	1,766
Non-Accrual Loans	26	24
Other loans held for investment | Other loan commitments | Current
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	1,598	1,731
Other loans held for investment | Other loan commitments | Loans 30-89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Loans Receivable	$ 21	$ 11

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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