Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2013

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Change in Asset Retirement Obligation [Table Text Block]

A reconciliation of the asset retirement obligations for 2013 follows:

	(In millions)
Asset retirement obligations at December 31, 2012	$	1,557
Accretion	96
Revision in estimated cash flows	12
Liabilities incurred	4
Liabilities settled	(2		)
Asset retirement obligations at December 31, 2013	$	1,667