Losses and Other Expenses, net (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Summary of Losses (Gains) and Other Expenses, net
Realized losses (gains) on settled futures contracts		$ 1.5		$ (0.1)		$ (1.5)
Foreign currency exchange losses		0.8		1.4		0.5
Loss (gain) on disposal of fixed assets		0.4		(0.8)		0.1
Asset impairments	6.7	0		0.2		0
Net change in unrealized losses (gains) on unsettled futures contracts		(2.2)		3.8		(0.6)
Gain on sale of entity		0		(0.1)		(0.2)
Acquisition expenses		0.1	[1]	1.0	[1]	4.9	[1]
Special legal contingency charge		1.2	[2]	0	[2]	0	[2]
Other items, net		0.7		0.3		0.2
Losses and other expenses, net		$ 2.5		$ 5.7		$ 3.4

[1] Acquisition expenses in 2010 and 2011 primarily relate to the Kysor/Warren acquisition. Note 3 provides more information on this acquisition.

[2] Special legal contingency charge in 2012 relates to patent litigation claims involving products from an acquired business. For more information, see Note 11.