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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Other Commitments [Line Items] |  |
Total loans and leases held for investment | $ 66,592 | $ 68,272
Asset Pledged as Collateral |  |
Other Commitments [Line Items] |  |
Pledged investment securities | 12,500 | 10,200
Total loans and leases held for investment | $ 38,000 | $ 44,600

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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3B -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
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