Annual report pursuant to Section 13 and 15(d)

BORROWINGS - Narrative (Details)

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BORROWINGS - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 26, 2024
Sep. 30, 2023
Dec. 31, 2023
Debt Instrument [Line Items]      
Carrying value of assets pledged as collateral against repurchase agreements     $ 840
Fixed-to-Floating Senior Notes Due August 21, 2029 | Senior Notes      
Debt Instrument [Line Items]      
Debt face amount   $ 1,300  
Stated rate   6.208%  
Fixed-to-Floating Senior Notes Due August 21, 2029 | Senior Notes | SOFR      
Debt Instrument [Line Items]      
Basis spread on variable rate   20200.00%  
Fixed-to-Floating Senior Notes Due February 2, 2035 | Senior Notes | Subsequent Event      
Debt Instrument [Line Items]      
Debt face amount $ 1,300    
Stated rate 5.709%    
Fixed-to-Floating Senior Notes Due February 2, 2035 | Senior Notes | SOFR | Subsequent Event      
Debt Instrument [Line Items]      
Basis spread on variable rate 1.87%