Deposits - Brokered Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Other Liabilities Disclosure [Abstract]
Brokered money market accounts	$ 137	$ 1,258
Brokered interest-bearing checking accounts represented	577	1,599
Brokered certificates of deposit	9,510	6,605
Total brokered deposits	$ 10,224	$ 9,462

Amount of interest-bearing domestic third-party deposits placed by or through the assistance of a deposit broker, also known as brokered deposit liabilities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(12))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant