Securities Financing Activities - Master Netting (Details) - USD ($) $ in Millions		Jun. 30, 2025	Dec. 31, 2024
Offsetting Assets [Line Items]
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, before Offset	[1]	$ 1,171	$ 1,322
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset	[2]	(1,166)	(1,313)
Security Purchased under Agreement to Resell, Subject to Master Netting Arrangement, after Offset		5	9
Security Borrowed, Subject to Master Netting Arrangement, before Offset	[1]	1,485	1,228
Security Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset	[2]	(1,452)	(1,192)
Security Borrowed, Subject to Master Netting Arrangement, after Offset		33	36
Security Purchased under Agreement to Resell, and Security Borrowed, Subject to Master Netting Arrangement, before Offset	[1]	2,656	2,550
Security Purchased under Agreement to Resell and Securities Borrowed, Subject to Master Netting Arrangement, Collateral, Obligation to Return Security Not Offset	[2]	(2,618)	(2,505)
Securities Purchased Under Agreements to Resell and Security Borrowed, Subject to Master Netting Arrangement, after Offset		38	45
Securities Held as Collateral, at Fair Value		2,200	1,600
Fair value of collateral permitted to be resold or repledged		2,600	2,500
Securities Sold under Agreements to Repurchase
Offsetting Assets [Line Items]
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, before Offset	[1]	(3,657)	(9,675)
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, Asset Offset	[2]	3,657	9,675
Security Sold under Agreement to Repurchase, Subject to Master Netting Arrangement, after Offset		$ 0	$ 0

[1] There were no securities financing transactions subject to legally enforceable master netting arrangements that were eligible for balance sheet netting for the periods presented.

[2] The fair value of received/pledged financial instruments is limited to the carrying amount of the associated asset or liability. The fair value of collateral received that was permitted to be resold or repledged was $2.6 billion as of June 30, 2025 and $2.5 billion as of December 31, 2024. Of the fair value of collateral permitted to be resold or repledged, the fair value of securities repledged or resold was $2.2 billion as of June 30, 2025 and $1.6 billion as of December 31, 2024.