Restructuring Charges (Tables)

12 Months Ended

Dec. 31, 2014

Restructuring and Related Activities [Abstract]

Schedule of restructuring charges

As a result, we have recorded the following impairment charges.

(millions)	2014		2013		2012
Ocean vessels	$	60	$	—	$	—
Wallboard lines or facilities	16		—		—
Previously incurred costs related to construction of future facilities	12		—		—
Permanently closed gypsum quarry and ship loading facility	—		—		7
Other	2		—		1
Total long-lived asset impairment charges	$	90	$	—	$	8

As part of our continuing efforts to adapt our operations to market conditions, we implemented restructuring activities in 2013 and 2012 that resulted in the following restructuring charges:

(millions)	2014		2013			2012
Severance	—		2			6
Lease obligations	—		(1		)	—
Other exit costs	—		2			4
Total	$	—	$	3		$	10

Schedule of restructuring reserve

The restructuring reserve for the years ended December 31, 2014, 2013 and 2012 is summarized as follows:

	Balance as of January 1		Annual Activity						Balance as of December 31
(millions)			Charges			Cash Payments
2014 Activity:
Severance	$	1	$	—		$	—		$	1
Lease obligations	10		—			(3		)	7
Other exit costs	—		—			—			—
Total	$	11	$	—		$	(3	)	$	8
2013 Activity:
Severance	$	5	$	2		$	(6	)	$	1
Lease obligations	15		(1		)	(4		)	10
Other exit costs	—		2			(2		)	—
Total	$	20	$	3		$	(12	)	$	11
2012 Activity:
Severance	$	4	$	6		$	(5	)	$	5
Lease obligations	21		—			(6		)	15
Other exit costs	9		4			(13		)	—
Total	$	34	$	10		$	(24	)	$	20