Business Segments (Tables)

9 Months Ended

Sep. 30, 2015

Segment Reporting [Abstract]

Summary of Operating Results by Reportable Segment

Operating results by reportable segment are as follows (in millions):

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
Revenue:
United States	$	497		$	748		$	1,594		$	2,114
Canada		94			173			299			489
International		162			149			473			496
Total revenue	$	753		$	1,070		$	2,366		$	3,099
Operating profit (loss):
United States	$	(294	)	$	28		$	(329	)	$	86
Canada		2			14			—			33
International		1			8			3			36
Total operating profit (loss)	$	(291	)	$	50		$	(326	)	$	155
Operating profit (loss) % of revenue:
United States		(59.2	%)		3.7	%		(20.6	%)		4.1	%
Canada		2.1	%		8.1	%		0.0	%		6.7	%
International		0.6	%		5.4	%		0.6	%		7.3	%
Total operating profit (loss) %		(38.6	%)		4.7	%		(13.8	%)		5.0	%