BUSINESS SEGMENT INFORMATION - Reconciliation of Revenue from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Total revenues	$ 3,944	$ 1,153
Operating Segments | Individual Retirement
Segment Reporting Information [Line Items]
Total revenues	1,022	980
Operating Segments | Group Retirement
Segment Reporting Information [Line Items]
Total revenues	334	329
Operating Segments | Investment Management and Research
Segment Reporting Information [Line Items]
Total revenues	1,135	1,004
Operating Segments | Protection Solutions
Segment Reporting Information [Line Items]
Total revenues	851	826
Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	374	334
Adjustments
Adjustments related to:
Variable annuity product features	631	(2,282)
Investment gains (losses), net	(326)	183
Other adjustments to segment revenues	(77)	(221)
Intersegment Eliminations
Adjustments related to:
Investment expenses	21	19
Intersegment Eliminations | Investment management and other fees
Adjustments related to:
Revenues	$ 28	$ 30