INVESTMENTS - NET UNREALIZED INVESTMENTS (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net Unrealized Gains (Losses) on Investments
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	$ 1,527
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	1,527
Balance, End of Period	192
Net Unrealized Gains (Losses) on Investments | With OTTI loss
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	1	$ 19
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	1	19
Net investment gains (losses) arising during the period	0	49
Reclassification adjustment for OTTI losses excluded from Net earnings (loss)	0	0
Balance, End of Period	(1)	20
Net Unrealized Gains (Losses) on Investments | All other
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	1,526	428
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	1,526	428
Net investment gains (losses) arising during the period	(88)	166
Reclassification adjustment for OTTI losses excluded from Net earnings (loss)	0	0
Balance, End of Period	193	606
DAC | With OTTI loss
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	1	(1)
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	1	(1)
Impact of net unrealized investment gains (losses) on DAC	(1)	(4)
Balance, End of Period	0	(5)
DAC | All other
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	(315)	(70)
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	(315)	(70)
Impact of net unrealized investment gains (losses) on DAC	288	(73)
Balance, End of Period	(27)	(143)
Policyholders’ Liabilities | With OTTI loss
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	(1)	(10)
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	(1)	(10)
Impact of net unrealized investment gains (losses) on policyholders' liabilities	1	5
Balance, End of Period	0	(5)
Policyholders’ Liabilities | All other
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	(232)	(188)
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	(232)	(188)
Impact of net unrealized investment gains (losses) on policyholders' liabilities	108	26
Balance, End of Period	(124)	(162)
Deferred Income Tax Asset (Liability) | With OTTI loss
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	(5)	(3)
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	(5)	(3)
Impact of net unrealized investment gains (losses) on deferred income taxes	0	(1)
Balance, End of Period	(5)	(4)
Deferred Income Tax Asset (Liability) | All other
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	(300)	(60)
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	(300)	(60)
Impact of net unrealized investment gains (losses) on deferred income taxes	197	(46)
Balance, End of Period	(103)	(106)
AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) | With OTTI loss
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	(4)	5
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	(4)	5
Net investment gains (losses) arising during the period	0	49
Reclassification adjustment for OTTI losses excluded from Net earnings (loss)	0	0
Impact of net unrealized investment gains (losses) on DAC	(1)	(4)
Impact of net unrealized investment gains (losses) on deferred income taxes	0	(1)
Impact of net unrealized investment gains (losses) on policyholders' liabilities	1	5
Balance, End of Period	(6)	6
AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) | All other
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	679	110
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	679	110
Net investment gains (losses) arising during the period	(88)	166
Reclassification adjustment for OTTI losses excluded from Net earnings (loss)	0	0
Impact of net unrealized investment gains (losses) on DAC	288	(73)
Impact of net unrealized investment gains (losses) on deferred income taxes	197	(46)
Impact of net unrealized investment gains (losses) on policyholders' liabilities	108	26
Balance, End of Period	(61)	195
Fixed Maturities | Net Unrealized Gains (Losses) on Investments | With OTTI loss
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	1
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	1
Balance, End of Period	(1)
Fixed Maturities | Net Unrealized Gains (Losses) on Investments | All other
Unrealized Net Investment Gain and Losses [Line Items]
Net Unrealized Gains (Losses)	1,526
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Balance, beginning of year	1,526
Balance, End of Period	193
Fixed Maturities | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) | With OTTI loss
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Reclassification adjustment for OTTI losses included in Net income (loss)	(2)	(48)
Fixed Maturities | AOCI Gain (Loss) Related to Net Unrealized Investment Gains (Losses) | All other
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Reclassification adjustment for OTTI losses included in Net income (loss)	(1,245)	12
Fixed Maturities | Included in Net income (loss) | With OTTI loss
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Reclassification adjustment for OTTI losses included in Net income (loss)	(2)	(48)
Fixed Maturities | Included in Net income (loss) | All other
Net Unrealized Investment Gains Losses Recognized In Aoci Roll Forward [Abstract]
Reclassification adjustment for OTTI losses included in Net income (loss)	$ (1,245)	$ 12