Investment in Unconsolidated Affiliates Summarized Income Statement of Equity Method Investment (Tables)

9 Months Ended

Sep. 30, 2015

Summarized Financial Information of Equity Method Investment [Line Items]

Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block]

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
Income Statement	2015			2014		2015			2014
	(In millions)
Operating revenues	$	646		$	803	$	1,852		$	2,632
Cost of sales	287			439		856			1,550
Operating income	(975		)	152		(778		)	452
Net income	(985		)	139		(817		)	408