Securities Financing Activities - Transfers Not Qualifying for Sale Accounting (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
Securities Financing Transactions Disclosures [Abstract]
Transfers not qualifying for sale accounting	$ 790	$ 787

Carrying amount of financial assets accounted for as secured borrowings recognized in the transferor's statement of financial position at the end of each period presented.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 1A
-Subparagraph (b)(1)
-SubTopic 30
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

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