REVISION OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Apr. 01, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Current and deferred income taxes	$ 0		$ 77
Assets for Market Risk Benefits	24	$ 8,200	11
Total Assets	44,196		8,226
Liability for Market Risk Benefits	7,333		16
Total Liabilities	42,036		7,995
Accumulated deficit	969		(222)
Accumulated other comprehensive income (loss)	(694)		(381)
Total Equity	2,160		231	$ 647	$ 781
Total Liabilities and Equity	$ 44,196		8,226
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Current and deferred income taxes			76
Assets for Market Risk Benefits			12
Total Assets			8,226
Liability for Market Risk Benefits			15
Total Liabilities			7,994
Accumulated deficit			(220)
Accumulated other comprehensive income (loss)			(382)
Total Equity			232
Total Liabilities and Equity			8,226
Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Current and deferred income taxes			1
Assets for Market Risk Benefits			(1)
Total Assets			0
Liability for Market Risk Benefits			1
Total Liabilities			1
Accumulated deficit			(2)
Accumulated other comprehensive income (loss)			1
Total Equity			(1)
Total Liabilities and Equity			$ 0