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	Dec. 31, 2013	Sep. 30, 2014
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Current Assets	$ 4,698	$ 6,029
Equity Method Investment Summarized Financial information, PPE	45,087	38,907
Equity Method Investment Summarized Financial information, Other Assets	15,388	17,582
Equity Method Investment, Summarized Financial Information, Assets	65,173	62,518
Equity Method Investment, Summarized Financial Information, Revenue	34,292	55,475	$ 48,335
Equity Method Investment, Summarized Financial Information, Income (Loss) from Continuing Operations before Extraordinary Items	2,259	2,443	1,619
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	1,521	1,299	$ 746
Equity Method Investment, Summarized Financial Information, Current Liabilities	4,121	6,585
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	34,021	30,622
Equity Method Investment Summarized Financial Information, Equity	27,031	25,311
equity method investment summarized financial information, total liabilities and equity	$ 65,173	$ 62,518
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		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		6.3