Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	$ 167.0	$ 163.6
Accumulated Amortization, intangible assets subject to amortization	(55.7)	(35.2)
Net Carrying Amount, intangible assets subject to amortization	111.3	128.4
Gross Carrying Amount, total intangible assets	172.7	171.6
Net Carrying Amount, intangible assets not subject to amortization	117.0	136.4
Impairment charge on definite-lived intangible assets	16.4
Amortization expense related to intangible assets subject to amortization	22.0	18.1	5.8
Estimated future amortization expense related to amortizable intangible asset:
2013	20.4
2014	19.8
2015	19.6
2016	19.1
2017	18.7
Thereafter	13.7
Total	111.3
Existing technology and related patents
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	151.5	141.4
Accumulated Amortization, intangible assets subject to amortization	(47.6)	(29.9)
Net Carrying Amount, intangible assets subject to amortization	103.9	111.5
Customer relationships
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	15.3	22.0
Accumulated Amortization, intangible assets subject to amortization	(7.9)	(5.1)
Net Carrying Amount, intangible assets subject to amortization	7.4	16.9
Trade names
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	0.2	0.2
Accumulated Amortization, intangible assets subject to amortization	(0.2)	(0.2)
In-process research and development
Intangible assets:
Gross Carrying Amount, intangible assets not subject to amortization	5.7	8.0
Net Carrying Amount, intangible assets not subject to amortization	$ 5.7	$ 8.0