FAIR VALUE MEASUREMENTS (Details - Quantitative Information about Level 3 Fair Value Measurements, Liabilities) - Discounted cash flow - Level 3 - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Index Annuities
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair value	$ 1,375	$ 859
Index Annuities | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Mortality multiplier	42.00%	101.00%
Lapse rates	0.50%	1.00%
Index Annuities | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Mortality multiplier	162.00%	103.00%
Lapse rates	40.00%	66.00%
Index Life
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair value	$ 477	$ 381
Index Life | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Base lapse rates	2.00%	2.00%
Mortality rates	0.00%	0.00%
Index Life | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Base lapse rates	19.00%	19.00%
Mortality rates	40.00%	40.00%
GMWB and GMAB
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Fair value	$ 2,104	$ 1,777
Utilization rates	100.00%
GMWB and GMAB | Minimum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Equity volatility	5.00%	13.00%
Base lapse rates	0.35%	0.50%
Dynamic lapse rates	30.00%	30.00%
Mortality multiplier	40.00%	42.00%
Utilization rates		100.00%
Equity/Interest-rate Correlation	20.00%	20.00%
GMWB and GMAB | Maximum
Fair Value Inputs, Liabilities, Quantitative Information [Line Items]
Equity volatility	40.00%	50.00%
Base lapse rates	14.00%	20.00%
Dynamic lapse rates	170.00%	170.00%
Mortality multiplier	153.00%	161.00%
Utilization rates		100.00%
Equity/Interest-rate Correlation	40.00%	40.00%