Fair Value Measurements Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis

The following tables present assets and liabilities accounted for at fair value on a recurring basis by hierarchy level.

	December 31, 2015
(In millions)	Level 1		Level 2		Level 3		Total
Derivative instruments, assets
Commodity	$	—	$	51	$	—	$	51
Interest rate	—		8		—		8
Derivative instruments, assets	$	—	$	59	$	—	$	59
Derivative instruments, liabilities
Commodity	$	—	$	1	$	—	$	1
Derivative instruments, liabilities	$	—	$	1	$	—	$	1
	December 31, 2014
(In millions)	Level 1		Level 2		Level 3		Total
Derivative instruments, assets
Interest rate	$	—	$	8	$	—	$	8
Derivative instruments, assets	$	—	$	8	$	—	$	8

Fair Value, Assets and Liabilities Measured on Nonrecurring Basis

The following table shows the values of assets, by major category, measured at fair value on a nonrecurring basis in periods subsequent to their initial recognition.

	2015				2014				2013
(In millions)	Fair Value		Impairment		Fair Value		Impairment		Fair Value		Impairment
Long-lived assets held for use	$	56	$	412	$	43	$	132	$	5	$	96

Fair Value, by Balance Sheet Grouping

The following table summarizes financial instruments, excluding receivables, commercial paper, payables and derivative financial instruments, and their reported fair value by individual balance sheet line item at December 31, 2015 and 2014.

	December 31,
	2015				2014
(In millions)	Fair Value		Carrying Amount		Fair Value		Carrying Amount
Financial assets
Other noncurrent assets	$	104	$	118	$	132	$	129
Total financial assets	$	104	$	118	$	132	$	129
Financial liabilities
Other current liabilities	$	34	$	33	$	13	$	13
Long-term debt, including current portion(a)	6,723		7,291		6,887		6,360
Deferred credits and other liabilities	97		95		69		68
Total financial liabilities	$	6,854	$	7,419	$	6,969	$	6,441

^(a)  Excludes capital leases.