Deposits - Additional Information (Details) - USD ($) $ in Billions	Mar. 31, 2026	Dec. 31, 2025
Other Liabilities Disclosure [Abstract]
Wholesale deposits	$ 5.2	$ 5.4
Reciprocal deposits	14.8	14.4
Earnings credits or referral fees	$ 30.2	$ 25.1

The aggregate amount of all wholesale deposit accounts including certificates of deposits.

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

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