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Commitment and Contingencies - Narrative (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Other Commitments [Line Items]
Fair Value	$ 10,416,000,000	$ 9,159,000,000
Total loans and leases held for investment	68,272,000,000	84,619,000,000
Commitments to purchase securities	0
Asset pledged as collateral
Other Commitments [Line Items]
Fair Value	10,200,000,000	2,800,000,000
Total loans and leases held for investment	$ 44,600,000,000	$ 43,100,000,000

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Commitments To Purchase Securities, Amount

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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

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