FAIR VALUE MEASUREMENTS (Details - Investments in certain other invested assets, including private equity funds, hedge funds and other alternative investments) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	$ 4,966	$ 5,997
Unfunded Commitments	1,956	1,239
Direct private equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	2,250	2,128
Unfunded Commitments	$ 1,947	1,227
Average original expected lives	10 years
Direct private equity | Maximum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Average original expected lives, Increments	2 years
Direct private equity | Minimum [Member]
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Average original expected lives, Increments	1 year
Direct private equity | 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	14.00%
Direct private equity | 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
Direct private equity | 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	43.00%
Direct private equity | 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
Direct private equity | 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
Direct private equity | 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	43.00%
Direct private equity | 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
Direct private equity | 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	$ 847	1,243
Unfunded Commitments	1,327	706
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	190	210
Unfunded Commitments	83	187
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	126	134
Unfunded Commitments	127	73
Growth equity
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	362	215
Unfunded Commitments	28	73
Mezzanine
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Fair Value Using Net Asset Value Per Share or its equivalent	211	171
Unfunded Commitments	75	135
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	514	155
Unfunded Commitments	307	53
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	2,716	3,869
Unfunded Commitments	$ 9	12
Hedge fund investments redeemable monthly (as a percent)	35.00%
Hedge fund investments redeemable quarterly (as a percent)	32.00%
Hedge fund investments redeemable semi-annually (as a percent)	9.00%
Hedge fund investments redeemable annually (as a percent)	24.00%
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	51.00%
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	$ 787	1,128
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	863	1,233
Unfunded Commitments	0	0
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	887	1,011
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	21	266
Unfunded Commitments	8	8
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	158	231
Unfunded Commitments	$ 1	$ 4