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DEBT - SMBC Funding Facility Narrative (Details) $ in Millions		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2023 USD ($) extensionOption	Apr. 27, 2023	Sep. 30, 2023 USD ($) extensionOption	Sep. 30, 2023 USD ($) extensionOption	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Principal amount of debt outstanding	$ 11,558		$ 11,558	$ 11,558	$ 12,245
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]
Total Aggregate Principal Amount Committed/ Outstanding	$ 800		$ 800	$ 800
Number of debt maturity extensions | extensionOption	2		2	2
Term of debt maturity extension option				1 year
Principal amount of debt outstanding	$ 401		$ 401	$ 401	$ 451
SMBC Funding Facility | Line of Credit | Secured Overnight Financing Rate (SOFR)
Debt Instrument [Line Items]
Interest rate spread	1.75%
SMBC Funding Facility | Line of Credit | Secured Overnight Financing Rate (SOFR) | Minimum
Debt Instrument [Line Items]
Interest rate spread			1.75%
SMBC Funding Facility | Line of Credit | Secured Overnight Financing Rate (SOFR) | Maximum
Debt Instrument [Line Items]
Interest rate spread			2.00%
SMBC Funding Facility | Line of Credit | Secured Overnight Financing Rate (SOFR), Credit Spread Adjustment
Debt Instrument [Line Items]
Interest rate spread			0.10%
SMBC Funding Facility | Line of Credit | Base Rate | Minimum
Debt Instrument [Line Items]
Interest rate spread		0.75%	0.75%
SMBC Funding Facility | Line of Credit | Base Rate | Maximum
Debt Instrument [Line Items]
Interest rate spread		1.00%	1.00%
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%

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