Goodwill and Other Intangible Asset (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill and Other Intangible Assets
Indefinite-lived trade name intangible asset	$ 52.3
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	379.3	272.0
Accumulated Amortization	143.8	107.1
Weighted average useful lives of amortizable intangible assets	10 years
Amortization expense	36.6	20.1	19.8
Amortization expense estimated for each of the next five fiscal years
2015	32.9
2016	32.0
2017	31.8
2018	27.8
2019	23.7
Customer relationships
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	299.8	202.3
Accumulated Amortization	92.3	69.8
Weighted average useful lives of amortizable intangible assets	10 years
Proprietary technology
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	53.8	52.3
Accumulated Amortization	26.5	22.4
Weighted average useful lives of amortizable intangible assets	14 years
License agreements
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	6.0	6.0
Accumulated Amortization	6.0	6.0
Weighted average useful lives of amortizable intangible assets	8 years
Trade names, backlog and other
Summary of the Company's amortizable intangible assets
Gross Carrying Amount	19.7	11.4
Accumulated Amortization	19.0	8.9
Weighted average useful lives of amortizable intangible assets	2 years
Backlog
Summary of the Company's amortizable intangible assets
Amortization expense	$ 9.8