Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Reclassfication Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of prior service credit, net of tax	$ 0.5	$ 1.8
Amortization of net actuarial gain (loss), net of tax	2.5	0.5
Total reclassification, net of tax - pension and postretirement benefits	3.0	2.3
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of tax	(0.1)	(2.3)
Total reclassification, net of tax	2.9	0
Commodity [Member]
Reclassfication Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of tax	0	(1.1)
Currency [Member]
Reclassfication Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of tax	$ (0.1)	$ (1.2)