Securities Financing Activities - Transfers Not Qualifying for Sale Accounting (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Securities Financing Transactions Disclosures [Abstract]
Transfers not qualifying for sale accounting	$ 734	$ 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.

No definition available.

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