Fair Value Option - Fair Value Loans on Nonaccrual Status (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair Value Disclosures [Abstract]
Nonaccrual loans	$ 1,240	$ 647
Nonaccrual loans 90 or more days past due	$ 124	$ 155

This item represents the aggregate fair value of loans held as assets that are in nonaccrual status for which the fair value option has been elected, if the entity's policy is to recognize interest income separately from other changes in fair value.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 28
-Subparagraph (e)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482907/825-10-50-28

Name:	us-gaap_FairValueOptionLoansHeldAsAssetsAggregateAmountInNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant