FAIR VALUE MEASUREMENTS (Details 7) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	$ 7,024	$ 6,041
Unfunded Commitments	929	875
Expected remaining lives of less than 3 years
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
First threshold level of remaining lives	3 years
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	65.00%
Expected remaining lives of less than 3 to 7 years
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Second threshold level of remaining lives	7 years
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	33.00%
Expected remaining lives of less than 7 to 10 years
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Third threshold level of remaining lives	10 years
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	2.00%
Private equity funds:
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	3,418	3,233
Unfunded Commitments	907	873
Average original expected lives	10 years
Investment redemption notice period (in days/years)	1 year
Second investment redemption notice period	2 years
Leveraged buyout
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	2,671	2,529
Unfunded Commitments	630	669
Real Estate / Infrastructure
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	286	251
Unfunded Commitments	40	52
Venture capital
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	144	157
Unfunded Commitments	14	16
Distressed
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	191	184
Unfunded Commitments	41	36
Other..
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	126	112
Unfunded Commitments	182	100
Hedge funds:
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	3,606	2,808
Unfunded Commitments	22	2
Hedge fund investments redeemable monthly (as a percent)	16.00%
Hedge fund investments redeemable quarterly (as a percent)	39.00%
Hedge fund investments redeemable semi-annually (as a percent)	23.00%
Hedge fund investments redeemable annually (as a percent)	22.00%
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	74.00%
Investment redemption notice period (in days/years)	1 day to 180 days
Event-driven
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	908	788
Unfunded Commitments	2	2
Long-short
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	1,492	1,318
Macro
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	480	320
Distressed.
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	460	316
Unfunded Commitments	20
Emerging markets
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	221
Other hedge funds
INVESTMENTS IN CERTAIN ENTITIES CARRIED AT FAIR VALUE USING NET ASSET VALUE PER SHARE
Fair Value Using Net Asset Value Per Share or its equivalent	$ 45	$ 66