Consolidated Statements of Stockholders' Equity and Comprehensive Income (USD $) In Millions, unless otherwise specified	Total	Common Stock Par	Common Stock Additional Paid-In Capital	Accumulated Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (Loss)	Treasury Shares	Comprehensive Income
Balance at Dec. 31, 2008	$ 509.2	$ 1.0	$ 526.0	$ 14.7	$ (8.7)	$ (23.8)
Increase (Decrease) in Stockholders' Equity
Net income	56.3			56.3			56.3
Currency translation adjustments	10.1				10.1		10.1
Net unrealized gain (loss) on financial instruments, net of tax	6.7				6.7		6.7
Change in post-retirement benefit plans, net of tax	(15.1)				(15.1)		(15.1)
Comprehensive income							58.0
Activity under stock plans	8.4		9.3			(0.9)
Balance at Dec. 31, 2009	575.6	1.0	535.3	71.0	(7.0)	(24.7)
Increase (Decrease) in Stockholders' Equity
Net income	77.4			77.4			77.4
Currency translation adjustments	(17.1)				(17.1)		(17.1)
Net unrealized gain (loss) on financial instruments, net of tax	1.7				1.7		1.7
Change in post-retirement benefit plans, net of tax	7.3				7.3		7.3
Comprehensive income							69.3
Activity under stock plans	14.5		17.0			(2.5)
Balance at Dec. 31, 2010	659.4	1.0	552.3	148.4	(15.1)	(27.2)
Increase (Decrease) in Stockholders' Equity
Net income	135.5			135.5			135.5
Currency translation adjustments	(10.1)				(10.1)		(10.1)
Net unrealized gain (loss) on financial instruments, net of tax	(9.6)				(9.6)		(9.6)
Change in post-retirement benefit plans, net of tax	(5.0)				(5.0)		(5.0)
Comprehensive income							110.8
Activity under stock plans	32.0		36.9			(4.9)
Balance at Dec. 31, 2011	$ 802.2	$ 1.0	$ 589.2	$ 283.9	$ (39.8)	$ (32.1)