SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Asset Based Financing (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Variable Interest Entity
Total unconsolidated VIE assets	$ 420,289		$ 420,289		$ 433,920
Maximum exposure to unconsolidated VIEs	46,340		46,340		45,937
Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	66,735		66,735		62,749
Maximum exposure to unconsolidated VIEs	27,486		27,486		25,598
Proceeds from new securitizations	0	$ 0	0	$ 500
Cash flows received on retained interest and other net cash flows	0	$ 200	0	$ 300
Commercial and other real estate | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	30,731		30,731		26,146
Maximum exposure to unconsolidated VIEs	11,292		11,292		9,476
Corporate loans | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	586		586		460
Maximum exposure to unconsolidated VIEs	685		685		473
Hedge funds and equities | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	368		368		0
Maximum exposure to unconsolidated VIEs	58		58		0
Airplanes, ships and other assets | Asset-based financing
Variable Interest Entity
Total unconsolidated VIE assets	35,050		35,050		36,143
Maximum exposure to unconsolidated VIEs	$ 15,451		$ 15,451		$ 15,649