OPERATING SEGMENTS - Schedule of Operating Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Summarized financial information for the company's segments
Revenues	$ 1,713	$ 1,441
Pre-tax Adjusted Operating Income (Loss)	54	60
Non-operating income (loss)	73	(219)
Income (loss) before income tax	127	(159)
Income tax expense	(25)	30
Net income (loss)	102	(129)
Adjusted operating income tax expense	(9)	(16)
After-tax adjusted operating income	45	44
Income tax (expense) benefit on adjustments	(16)	46
Non-operating income (loss)
Derivative gains (losses)	181	(25)
Investment gains (losses)	(54)	(276)
VA/VUL market impacts	8	0
Less: related amortization	87	(59)
Less: VA GLWB economic cost	(25)	(23)
Net investment income	720	754
Amortization of deferred policy acquisition costs and value of business acquired	105	54
Operating Segment Assets
Investments and other assets	120,466		$ 122,124
DAC and VOBA	3,707		3,420
Other intangibles	530		540
Goodwill	826		826
Total assets	125,529		126,910
Retail Life and Annuity
Summarized financial information for the company's segments
Revenues	773	532
Pre-tax Adjusted Operating Income (Loss)	(17)	(11)
Non-operating income (loss)
Net investment income	266	253
Amortization of deferred policy acquisition costs and value of business acquired	87	(14)
Operating Segment Assets
Investments and other assets	41,555		39,874
DAC and VOBA	2,635		2,480
Other intangibles	359		367
Goodwill	559		559
Total assets	45,108		43,280
Acquisitions
Summarized financial information for the company's segments
Revenues	789	799
Pre-tax Adjusted Operating Income (Loss)	77	75
Non-operating income (loss)
Net investment income	399	416
Amortization of deferred policy acquisition costs and value of business acquired	2	52
Operating Segment Assets
Investments and other assets	54,851		55,628
DAC and VOBA	892		762
Other intangibles	32		33
Goodwill	24		24
Total assets	55,799		56,447
Stable Value Products
Summarized financial information for the company's segments
Revenues	81	37
Pre-tax Adjusted Operating Income (Loss)	31	25
Non-operating income (loss)
Net investment income	63	63
Amortization of deferred policy acquisition costs and value of business acquired	1	1
Operating Segment Assets
Investments and other assets	6,525		5,928
DAC and VOBA	10		8
Other intangibles	6		6
Goodwill	114		114
Total assets	6,655		6,056
Asset Protection
Summarized financial information for the company's segments
Revenues	71	74
Pre-tax Adjusted Operating Income (Loss)	14	12
Non-operating income (loss)
Net investment income	6	8
Amortization of deferred policy acquisition costs and value of business acquired	15	15
Operating Segment Assets
Investments and other assets	906		881
DAC and VOBA	170		170
Other intangibles	98		101
Goodwill	129		129
Total assets	1,303		1,281
Corporate and Other
Summarized financial information for the company's segments
Revenues	(1)	(1)
Pre-tax Adjusted Operating Income (Loss)	(51)	(41)
Non-operating income (loss)
Net investment income	(14)	14
Amortization of deferred policy acquisition costs and value of business acquired	0	$ 0
Operating Segment Assets
Investments and other assets	16,629		19,813
DAC and VOBA	0		0
Other intangibles	35		33
Goodwill	0		0
Total assets	$ 16,664		$ 19,846