Goodwill and Other Intangible Assets (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	$ 165.0		$ 165.0		$ 176.1
Accumulated Amortization, intangible assets subject to amortization	(82.1)		(82.1)		(76.2)
Net Carrying Amount, intangible assets subject to amortization	82.9		82.9		99.9
Gross Carrying Amount, total intangible assets	170.7		170.7		181.8
Net Carrying Amount, total intangible assets	88.6		88.6		105.6
Impairment charge on definite-lived intangible assets	1.4		1.4
Amortization expense related to intangible assets subject to amortization	5.1	5.1	15.1	15.3
CAM division
Intangible assets:
Impairment charge on definite-lived intangible assets	1.4		1.4
In-process research and development
Intangible assets:
Gross Carrying Amount, intangible assets not subject to amortization	5.7		5.7		5.7
Net Carrying Amount, total intangible assets	5.7		5.7		5.7
Existing technology and related patents
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	151.2		151.2		157.9
Accumulated Amortization, intangible assets subject to amortization	(76.7)		(76.7)		(68.2)
Net Carrying Amount, intangible assets subject to amortization	74.5		74.5		89.7
Customer relationships
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	13.7		13.7		18.0
Accumulated Amortization, intangible assets subject to amortization	(5.3)		(5.3)		(7.8)
Net Carrying Amount, intangible assets subject to amortization	8.4		8.4		10.2
Trade names
Intangible assets:
Gross Carrying Amount, intangible assets subject to amortization	0.1		0.1		0.2
Accumulated Amortization, intangible assets subject to amortization	$ (0.1)		$ (0.1)		$ (0.2)