Interest Expense (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Interest Expense [Table Text Block]

Interest expense includes interest and amortization of debt discounts, less amounts capitalized, as follows:

(In millions)	2014			2013			2012
Interest expense before capitalization	$	452		$	431		$	379
Capitalized interest	(24		)	(39		)	(22		)
	$	428		$	392		$	357