Intangible Assets, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Intangible assets subject to amortization:
Intangible assets subject to amortization, Gross Carrying Amount	$ 754.3		$ 754.3		$ 674.7
Intangible assets subject to amortization, Accumulated Amortization	(341.0)		(341.0)		(299.6)
Intangible assets
Intangible assets, Gross Carrying Amount	1,507.2		1,507.2		1,425.0
Amortization expense for intangible assets			40.6	$ 41.0
Changes in intangible assets due to foreign currency translation gains			2.5
Impairment losses of intangible assets, indefinite-lived	36.4	$ 21.2	36.4	21.2
Impairment losses of intangible assets, finite-lived		$ 14.4		$ 14.4
Summary of estimated aggregate amortization expense for the remaining three months of 2016 and each of the succeeding five years
2016	13.5		13.5
2017	50.4		50.4
2018	46.1		46.1
2019	46.0		46.0
2020	46.0		46.0
2021	42.0		42.0
2016 Acquisitions
Intangible assets not subject to amortization:
Intangible assets recorded in connection with our 2016 acquisitions	38.2		38.2
Intangible assets
Intangible assets recorded in connection with our 2016 acquisitions	115.3		115.3
Trade names
Intangible assets not subject to amortization:
Intangible assets not subject to amortization, Gross Carrying Amount	752.9		752.9		750.3
Trade names | 2016 Acquisitions
Intangible assets not subject to amortization:
Intangible assets recorded in connection with our 2016 acquisitions	38.2		$ 38.2
Covenants not to compete
Intangible assets subject to amortization:
Weighted average amortizable life in years			4 years 6 months
Intangible assets subject to amortization, Gross Carrying Amount	1.8		$ 1.8		1.3
Intangible assets subject to amortization, Accumulated Amortization	(1.2)		$ (1.2)		(1.0)
Customer lists/relationships
Intangible assets subject to amortization:
Weighted average amortizable life in years			14 years 7 months 6 days
Intangible assets subject to amortization, Gross Carrying Amount	738.1		$ 738.1		659.0
Intangible assets subject to amortization, Accumulated Amortization	(326.2)		$ (326.2)		(285.7)
Software - internal use
Intangible assets subject to amortization:
Weighted average amortizable life in years			10 years
Intangible assets subject to amortization, Gross Carrying Amount	8.1		$ 8.1		8.1
Intangible assets subject to amortization, Accumulated Amortization	(8.1)		$ (8.1)		(7.9)
Other
Intangible assets subject to amortization:
Weighted average amortizable life in years			5 years 2 months 12 days
Intangible assets subject to amortization, Gross Carrying Amount	6.3		$ 6.3		6.3
Intangible assets subject to amortization, Accumulated Amortization	$ (5.5)		$ (5.5)		$ (5.0)