FAIR VALUE MEASUREMENTS (Details 7) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 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	$ 7,312	$ 6,041
Unfunded Commitments	980	875
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	3,456	3,233
Unfunded Commitments	960	873
Average original expected lives	10 years
Investment redemption notice period (in days/years)	1 year
Second investment redemption notice period	2 years
Private equity funds: | 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	64.00%
Private equity funds: | 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%
Private equity funds: | 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	3.00%
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	2,654	2,529
Unfunded Commitments	605	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	337	251
Unfunded Commitments	74	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	141	157
Unfunded Commitments	13	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	190	184
Unfunded Commitments	39	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	134	112
Unfunded Commitments	229	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	3,856	2,808
Unfunded Commitments	20	2
Hedge fund investments redeemable monthly (as a percent)	13.00%
Hedge fund investments redeemable quarterly (as a percent)	44.00%
Hedge fund investments redeemable semi-annually (as a percent)	22.00%
Hedge fund investments redeemable annually (as a percent)	21.00%
Percentage of hedge fund investments that cannot be redeemed, either in whole or in part	71.00%
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	937	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	1,548	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	515	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	525	316
Unfunded Commitments	18
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	245
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	$ 86	$ 66