Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Commodity Derivative Activity Recorded in Statement of Consolidated Operations

The following table summarizes the effect of derivative instruments on the Company’s statement of consolidated operations:

	Gain (Loss) on Derivatives Recognized in Income	For the Year Ended December 31,
		2016		2015		2014
		(In millions)
Derivatives not designated as cash flow hedges:
Realized loss		$	—	$	—	$	(16	)
Unrealized gain (loss)		—		—		300
Gain (loss) on derivatives not designated as cash flow hedges	Revenues and Other: Other	$	—	$	—	$	284