RECENT INVESTMENT ACTIVITY (Details) $ in Millions	Mar. 13, 2014 USD ($)
Mesquite Power [Member]
Deconsolidation of business [Line Items]
Gain on sale of equity interests	$ 61
Proceeds from sale	347
Gain on sale, after tax	36
Copper Mountain Solar 3 [Member]
Deconsolidation of business [Line Items]
Proceeds from sale, net of transaction costs	68
Cash	(2)
Property, plant and equipment, net	(247)
Other assets	(11)
Accounts payable and accrued expenses	82
Long-term debt including current portion	97
Other liabilities	3
Accumulated other comprehensive income	(2)
Gain on sale of equity interests	(27)
Equity method investments upon deconsolidation	(39)
Proceeds from sale, net of cash sold	66
Gain on sale, after tax	$ 16