Restructuring Costs Restructuring Costs (Tables)

12 Months Ended

Dec. 31, 2016

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs [Table Text Block]

Restructuring costs recorded in our consolidated statement of operations for the year ended December 31 are set forth below.

Type of Restructuring Cost	Location in the Consolidated Statement of Operations	2016		2015
		(In millions)
Severance and related benefit costs	Operating expenses - General and administrative	$	17	$	7
Relocation costs	Operating expenses - General and administrative	5		5
Office-lease abandonment costs	Operating expenses - General and administrative	6		14
Other associated costs	Operating expenses - Depreciation, depletion and amortization	—		1
Total		$	28	$	27

Schedule of Restructuring Reserve by Type of Cost [Table Text Block]

The following table summarizes our restructuring costs and related accruals.

	Severance and Related Benefit Costs			Office-lease Abandonment Costs			Relocation Costs			Other Associated Costs			Total
	(In millions)
Restructuring liability at January 1, 2015	$	—		$	—		$	—		$	—		$	—
Additions	7			14			5			1			27
Settlements	(6		)	(1		)	(5		)	(1		)	(13		)
Revisions	—			—			—			—			—
Restructuring liability at December 31, 2015	$	1		$	13		$	—		$	—		$	14
Cumulative costs as of December 31, 2015	$	7		$	14		$	5		$	1		$	27
Restructuring liability at January 1, 2016	$	1		$	13		$	—		$	—		$	14
Additions	17			3			5			—			25
Settlements	(17		)	(5		)	(5		)	—			(27		)
Revisions	—			3			—			—			3
Restructuring liability at December 31, 2016(1)	$	1		$	14		$	—		$	—		$	15
Cumulative costs as of December 31, 2016	$	24		$	20		$	10		$	1		$	55
Expected total costs	$	24		$	20		$	11		$	1		$	56