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ACQUISITIONS - Schedule of Financial Results of Investors (Details) - Investors Acquisition $ in Millions | 9 Months Ended
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Dec. 31, 2022 USD ($)
Business Acquisition [Line Items] |
Earnings since acquisition | $ 287
Net interest income |
Business Acquisition [Line Items] |
Earnings since acquisition | 627
Noninterest income |
Business Acquisition [Line Items] |
Earnings since acquisition | $ 37

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