INVESTMENTS IN UNCONSOLIDATED AFFILIATES INVESTMENTS IN UNCONSOLIDATED AFF. - Schedule of Equity Methold Investments(Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Current Assets	$ 4,698
Equity Method Investment Summarized Financial information, PPE	45,087
Equity Method Investment Summarized Financial information, Other Assets	15,388
Equity Method Investment, Summarized Financial Information, Assets	65,173
Equity Method Investment, Summarized Financial Information, Revenue	34,292	$ 55,475
Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations before Extraordinary Items	2,259	2,443
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	1,521	$ 1,299
Equity Method Investment, Summarized Financial Information, Current Liabilities	4,121
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	34,021
Equity Method Investment Summarized Financial Information, Equity	27,031
equity method investment summarized financial information, total liabilities and equity	$ 65,173
Regency [Member]
Schedule of Equity Method Investments [Line Items]
Number of common units of a subsidiary partnership that are held by a less than wholly-owned subsidiary of the Parent.		31.4
Class F Units [Member] | Regency [Member]
Schedule of Equity Method Investments [Line Items]
Number of common units of a subsidiary partnership that are held by a less than wholly-owned subsidiary of the Parent.		6.3