CONSOLIDATED STATEMENT OF EQUITY - 9 months ended Sep. 30, 2016 - USD ($) $ in Millions	Total	Subsidiary Equity Transactions [Member]	Common Stock [Member]	Paid-in Capital [Member]	Paid-in Capital [Member] Subsidiary Equity Transactions [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Noncontrolling Interests [Member] Subsidiary Equity Transactions [Member]
Balance at Dec. 31, 2015	$ 15,457		$ 52	$ 9,265		$ 4,880	$ (995)	$ (383)	$ 2,638
Net income (loss)	(2,356)					(2,556)			200
Common stock issued	2,312		5	2,307
Dividends—common stock	(78)					(78)
Repurchase of common stock	(32)						(32)
Subsidiary equity transactions		$ 1,004			$ 270					$ 734
Distributions to noncontrolling interest owners	(260)								(260)
Reclassification of previously deferred derivative losses to (gains) losses on derivatives, net	4							4
Adjustments for pension and other postretirement plans	(139)							(139)
Balance at Sep. 30, 2016	$ 15,912		$ 57	$ 11,842		$ 2,246	$ (1,027)	$ (518)	$ 3,312