SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset Based Financing (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Variable Interest Entity
Total unconsolidated VIE assets	$ 402,173		$ 402,173		$ 431,287
Maximum exposure to unconsolidated VIEs	46,791		46,791		45,931
Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	69,711		69,711		62,749
Maximum exposure to unconsolidated VIEs	28,115		28,115		25,598
Proceeds from new securitizations	400	$ 0	400	$ 500
Cash flows received on retained interest and other net cash flows	0	$ 0	0	$ 300
Gains recognized on the securitization	10		10
Commercial and other real estate | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	33,911		33,911		26,146
Maximum exposure to unconsolidated VIEs	11,203		11,203		9,476
Corporate loans | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	665		665		460
Maximum exposure to unconsolidated VIEs	747		747		473
Hedge funds and equities | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	358		358		0
Maximum exposure to unconsolidated VIEs	53		53		0
Airplanes, ships and other assets | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	34,777		34,777		36,143
Maximum exposure to unconsolidated VIEs	$ 16,112		$ 16,112		$ 15,649