ACQUISITIONS - Schedule of Financial Results of Investors (Details) - Investors Acquisition $ in Millions	3 Months Ended
Jun. 30, 2022 USD ($)
Business Acquisition [Line Items]
Net income	$ 114
Net interest income
Business Acquisition [Line Items]
Net income	232
Noninterest income
Business Acquisition [Line Items]
Net income	$ 13

This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-URI https://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Name:	us-gaap_BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration