FAIR VALUE MEASUREMENTS (Details 8) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	$ 692	$ 902	$ 1,161	$ 4,371
Fair value option credit risk gains (losses) on liabilities	19	63	(15)	(495)
Segment Discontinued Operations
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	606	(13)	605	554
Fair Value Option | Other long-term debt
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	313	(218)	322	(664)
Fair Value Option | Other liabilities
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	(2)	26	(6)	(22)
Fair Value Option | Mortgage and other loans receivable, net of allowance
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	1	9	2	31
Fair Value Option | Bond and equity securities
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	256	263	632	907
Fair Value Option | Trading - ML II Interest
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)				246
Fair Value Option | Trading - ML III Interest
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)		1,306		2,558
Fair Value Option | Retained interest in AIA
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)		(493)		1,302
Fair Value Option | Alternative investments
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	122		206
Fair Value Option | Short-term investments and other invested assets and Other assets
Fair Value, Option, Quantitative Disclosures
Fair Value Options Changes in Fair Value Gain (loss)	$ 2	$ 9	$ 5	$ 13