Intangibles (Tables)

12 Months Ended

Dec. 31, 2015

The net book values of identified intangible assets by segment as follows (in millions):

	United States			Canada			International			Total
Balance at December 31, 2013	$	50		$	2		$	16		$	68
Additions		10			—			—			10
Amortization		(3	)		(1	)		(1	)		(5	)
Balance at December 31, 2014		57			1			15			73
Additions		43			2			58			103
Amortization		(5	)		(1	)		(7	)		(13	)
Currency translation adjustments and other		—			—			(2	)		(2	)
Balance at December 31, 2015	$	95		$	2		$	64		$	161

Identified intangible assets by major classification consist of the following (in millions):

				Accumulated			Net Book
	Gross			Amortization			Value
December 31, 2013:
Trademarks and Patents	$	63		$	(6	)	$	57
Customer relationships		13			(3	)		10
Other (covenant not to compete)		4			(3	)		1
Total identified intangibles	$	80		$	(12	)	$	68
December 31, 2014:
Trademarks and Patents	$	61		$	(9	)	$	52
Customer relationships		24			(4	)		20
Other (covenant not to compete)		5			(4	)		1
Total identified intangibles	$	90		$	(17	)	$	73
December 31, 2015:
Trademarks and Patents	$	85		$	(14	)	$	71
Customer relationships		103			(12	)		91
Other (covenant not to compete)		5			(4	)		1
Currency translation adjustments and other		(2	)		—			(2	)
Total identified intangibles	$	191		$	(30	)	$	161

The following table represents the total estimated amortization of intangible assets for the five succeeding years:

For the Year Ending December 31	Estimated Amortization Expense
2016	$	17
2017		16
2018		15
2019		15
2020		15