Goodwill

12 Months Ended

Dec. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

Goodwill

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

	Years ended December 31,
	2018								2017						2016
	North America		International			Total			North America		International		Total		North America		International		Total
Beginning balance	$	1,105	$	92		$	1,197		$	1,105	$	91	$	1,196	$	1,105	$	84	$	1,189
Foreign currency translation	—		(11		)	(11		)	—		1		1		—		7		7
Ending balance	$	1,105	$	81		$	1,186		$	1,105	$	92	$	1,197	$	1,105	$	91	$	1,196