Goodwill and Intangibles (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangibles

Summary of change in goodwill

(in millions)	Amount
December 31, 2014	$	484.5
Disposition of subsidiary		(0.4)
December 31, 2015		484.1
Acquisitions		94.0
December 31, 2016	$	578.1

Summary of intangible assets

				As of December 31, 2016						As of December 31, 2015
	Useful Life			Gross Carrying		Accumulated		Net Carrying		Gross Carrying		Accumulated		Net Carrying
(in millions)	(in years)			Amount		Amortization		Amount		Amount		Amortization		Amount
Customer relationships	10	-	12		62.5		(8.7)		53.8		27.0		(5.8)		21.2
Technology	3	-	5	$	50.7	$	(22.2)	$	28.5	$	27.2	$	(16.2)	$	11.0
Trademarks		3			9.7		(5.7)		4.0		5.6		(5.2)		0.4
FCC licenses and other	2	-	20		3.1		(2.4)		0.7		2.7		(2.4)		0.3
Total				$	126.0	$	(39.0)	$	87.0	$	62.5	$	(29.6)	$	32.9

Schedule of estimated future annual amortization expense for acquired intangible assets

(in millions)	Amount
2017	$	17.1
2018		12.2
2019		11.4
2020		9.9
2021		9.4
Thereafter		27.0
Total	$	87.0