FAIR VALUE MEASUREMENTS (Details - Quantitative Information about Level 3 Fair Value Measurements, Assets)) - Discounted cash flow - Level 3 - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016
Corporate debt
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 430	$ 498
Corporate debt | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.18%	3.41%
Corporate debt | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.52%	6.38%
Corporate debt | Weighted-average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.35%	4.90%
Residential mortgage-backed securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 16,472	$ 17,412
Residential mortgage-backed securities | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	2.27%	3.28%
Constant prepayment rate	2.54%	3.95%
Loss severity	47.05%	47.51%
Constant default rate	3.21%	3.28%
Residential mortgage-backed securities | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.88%	5.87%
Constant prepayment rate	11.06%	6.54%
Loss severity	79.54%	80.98%
Constant default rate	7.87%	8.64%
Residential mortgage-backed securities | Weighted-average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	3.58%	4.57%
Constant prepayment rate	6.80%	5.25%
Loss severity	62.97%	64.24%
Constant default rate	5.54%	5.96%
Certain CDO/ABS
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 5,086	$ 4,368
Certain CDO/ABS | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	3.26%	3.67%
Certain CDO/ABS | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.99%	5.85%
Certain CDO/ABS | Weighted-average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.12%	4.76%
Commercial mortgage backed securities
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 488	$ 1,511
Commercial mortgage backed securities | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	1.86%	0.48%
Commercial mortgage backed securities | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	9.12%	10.21%
Commercial mortgage backed securities | Weighted-average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	5.49%	5.34%
Obligations of states, municipalities and political subdivisions
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value	$ 1,578	$ 1,248
Obligations of states, municipalities and political subdivisions | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	3.71%	4.12%
Obligations of states, municipalities and political subdivisions | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.49%	4.91%
Obligations of states, municipalities and political subdivisions | Weighted-average
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Yield	4.10%	4.52%