Supplemental Cash Flow Information (Tables)

6 Months Ended

Jun. 30, 2016

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information [Table Text Block]

Supplemental Cash Flow Information

	Six Months Ended June 30,
(In millions)	2016			2015
Net cash (used in) operating activities:
Interest paid (net of amounts capitalized)	$	(177	)	$	(143	)
Income taxes paid to taxing authorities	(61		)	(165		)
Noncash investing activities:
Asset retirement cost increase	$	2		$	6
Asset retirement obligations assumed by buyer	83			—