Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	$ 167.5	$ 167.0
Accumulated Amortization, intangible assets subject to amortization	(62.1)	(55.7)
Net Carrying Amount, intangible assets subject to amortization	105.4	111.3
Gross Carrying Amount, total intangible assets	173.2	172.7
Net Carrying Amount, total intangible assets	111.1	117.0
Impairment charge on definite-lived intangible assets		16.4
Amortization expense related to intangible assets subject to amortization	5.1		5.1
In-process research and development
Intangible assets:
Gross Carrying Amount, intangible assets not subject to amortization	5.7	5.7
Net Carrying Amount, total intangible assets	5.7	5.7
Existing technology and related patents
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	151.3	151.5
Accumulated Amortization, intangible assets subject to amortization	(53.6)	(47.6)
Net Carrying Amount, intangible assets subject to amortization	97.7	103.9
Customer relationships
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	16.0	15.3
Accumulated Amortization, intangible assets subject to amortization	(8.3)	(7.9)
Net Carrying Amount, intangible assets subject to amortization	7.7	7.4
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)