FAIR VALUE MEASUREMENTS (Details - Investments in certain other invested assets, including private equity funds, hedge funds and other alternative investments) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	$ 7,700	$ 8,577
Unfunded Commitments	1,049	1,003
Private equity funds:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	2,479	2,631
Unfunded Commitments	$ 1,014	970
Average original expected lives	10 years
Second investment redemption notice period	2 years
Private equity funds: | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Average original expected lives	2 years
Private equity funds: | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Average original expected lives	1 year
Private equity funds: | Expected remaining lives of less than 3 years
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	79.00%
Private equity funds: | Expected remaining lives of less than 3 years | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
First threshold level of remaining lives	3 years
Private equity funds: | Expected remaining lives of 4 to 6 years
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	10.00%
Private equity funds: | Expected remaining lives of 4 to 6 years | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Second threshold level of remaining lives	6 years
Private equity funds: | Expected remaining lives of 4 to 6 years | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Second threshold level of remaining lives	4 years
Private equity funds: | Expected remaining lives of 7 to 10 years
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	11.00%
Private equity funds: | Expected remaining lives of 7 to 10 years | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Third threshold level of remaining lives	10 years
Private equity funds: | Expected remaining lives of 7 to 10 years | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Third threshold level of remaining lives	7 years
Leveraged buyout
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	$ 1,683	1,774
Unfunded Commitments	453	436
Real Estate / Infrastructure
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	272	306
Unfunded Commitments	217	213
Venture capital
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	105	107
Unfunded Commitments	35	41
Distressed
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	142	146
Unfunded Commitments	42	41
Other..
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	277	298
Unfunded Commitments	267	239
Hedge funds:
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	5,221	5,946
Unfunded Commitments	$ 35	33
Hedge fund investments redeemable monthly (as a percent)	13.00%
Hedge fund investments redeemable quarterly (as a percent)	47.00%
Hedge fund investments redeemable semi-annually (as a percent)	10.00%
Hedge fund investments redeemable annually (as a percent)	30.00%
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	73.00%
Hedge funds: | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investment redemption notice period (in days/years)	180 days
Hedge funds: | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investment redemption notice period (in days/years)	1 day
Event-driven
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	$ 943	1,194
Unfunded Commitments	0	0
Long-short
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	2,647	2,978
Unfunded Commitments	28	25
Macro
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	556	555
Unfunded Commitments	0	0
Distressed
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	632	699
Unfunded Commitments	7	8
Emerging markets
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	293	353
Unfunded Commitments	0	0
Other hedge funds
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	150	167
Unfunded Commitments	$ 0	$ 0