Goodwill (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table summarizes the changes in the carrying amounts of goodwill by segment (in millions):

	Years Ended December 31,
	2015									2014								2013
	North America			International			Total			North America			International		Total			North America		International		Total
Beginning balance	$	1,106		$	138		$	1,244		$	1,108		$	132	$	1,240		$	1,108	$	—	$	1,108
Acquisition	—			—			—			—			6		6			—		132		132
Foreign currency translation	(1		)	(54		)	(55		)	(2		)	—		(2		)	—		—		—
Ending balance	$	1,105		$	84		$	1,189		$	1,106		$	138	$	1,244		$	1,108	$	132	$	1,240