Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ 65.3	$ (11.3)
Other comprehensive income
Foreign currency translation adjustments	1.9	4.7
Unrealized loss on derivative instruments	0	(0.2)
Unrealized gain on marketable securities, net of reversals	0.3	0.2
Defined benefit pension plans	1.4	0.7
Other comprehensive income, net of tax	3.6	5.4
Comprehensive income (loss)	$ 68.9	$ (5.9)