Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details)

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BORROWINGS - Schedule of Long-Term Debt and Debt Issuances (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Long-term debt $ 7,866 $ 7,108
Federal Home Loan Bank advances    
Debt Instrument [Line Items]    
Long-term debt 213 215
Other borrowings    
Debt Instrument [Line Items]    
Long-term debt 548 537
Parent    
Debt Instrument [Line Items]    
Long-term debt 3,398 3,111
Parent | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 2,389 2,083
Parent | Subordinated Notes    
Debt Instrument [Line Items]    
Long-term debt 1,009 1,028
Bank    
Debt Instrument [Line Items]    
Long-term debt 3,707 3,245
Bank | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 3,036 2,434
Bank | Subordinated Notes    
Debt Instrument [Line Items]    
Long-term debt $ 671 $ 811