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Derivative and Hedging Activities and Restricted Cash - Company's Carrying Amounts on our Hedged Loans (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Loans and Leases Held-For-Investment
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Amount of Hedged Items	$ 4,245	$ 5,861
Cumulative Amount of Fair Value Hedging Adjustment	(12)	(18)
Available-for-Sale Securities
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Carrying Amount of Hedged Items	993	0
Cumulative Amount of Fair Value Hedging Adjustment	$ 7	$ 0

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount of asset hedged in fair value hedging relationship.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4EE
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE

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Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4EE
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE

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