Interest Expense (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Interest Expense

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

(In millions)	2015			2014			2013
Interest expense before capitalization	$	431		$	452		$	431
Capitalized interest	(19		)	(24		)	(39		)
	$	412		$	428		$	392