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DEBT - SMBC Funding Facility Narrative (Details)
$ in Millions
9 Months Ended
Sep. 30, 2022
USD ($)
extensionOption
Sep. 30, 2022
USD ($)
extensionOption
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]      
Principal amount of debt outstanding $ 11,853 $ 11,853 $ 11,061
SMBC Funding Facility      
Debt Instrument [Line Items]      
Line of credit, borrowing capacity incremental increase limit 1,000 $ 1,000 1,000
SMBC Funding Facility | Minimum      
Debt Instrument [Line Items]      
Percentage of unused portion of line of credit commitment   0.50%  
SMBC Funding Facility | Maximum      
Debt Instrument [Line Items]      
Percentage of unused portion of line of credit commitment   1.00%  
SMBC Funding Facility | Line of Credit      
Debt Instrument [Line Items]      
Maximum borrowing capacity of line of credit $ 800 $ 800  
Number of debt maturity extensions | extensionOption 2 2  
Term of debt maturity extension option   1 year  
Principal amount of debt outstanding $ 456 $ 456 $ 401
SMBC Funding Facility | Line of Credit | London Interbank Offered Rate (LIBOR)      
Debt Instrument [Line Items]      
Interest rate spread 1.75%    
SMBC Funding Facility | Line of Credit | London Interbank Offered Rate (LIBOR) | Minimum      
Debt Instrument [Line Items]      
Interest rate spread   1.75%  
SMBC Funding Facility | Line of Credit | London Interbank Offered Rate (LIBOR) | Maximum      
Debt Instrument [Line Items]      
Interest rate spread   2.00%  
SMBC Funding Facility | Line of Credit | Base Rate | Minimum      
Debt Instrument [Line Items]      
Interest rate spread   0.75%  
SMBC Funding Facility | Line of Credit | Base Rate | Maximum      
Debt Instrument [Line Items]      
Interest rate spread   1.00%