Intangible Assets, net (Tables)

12 Months Ended

Dec. 31, 2015

Intangible Assets, net

Summarizes our intangible assets, net

		December 31, 2015				December 31, 2014
	Weighted Average	Gross				Gross
	Amortizable	Carrying		Accumulated		Carrying		Accumulated
	Life in Years	Amount		Amortization		Amount		Amortization
		(in millions)
Intangible assets subject to amortization:
Covenants not to compete	4.4	$	1.3	$	(1.0)	$	2.3	$	(1.7)
Customer lists/relationships	14.7		659.0		(285.7)		694.7		(249.3)
Software – internal use	10.0		8.1		(7.9)		8.1		(7.1)
Other	5.3		6.3		(5.0)		7.2		(4.5)
			674.7		(299.6)		712.3		(262.6)
Intangible assets not subject to amortization:
Trade names			750.3		—		777.7		—
		$	1,425.0	$	(299.6)	$	1,490.0	$	(262.6)

Summary of estimated aggregate amortization expense

	(in millions)
2016	$	49.3
2017		45.1
2018		40.8
2019		40.6
2020		40.7