Accumulated Other Comprehensive Loss (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	$ (1,049.4)	$ (1,107.4)
Financing costs, net	(14.0)	(16.6)
Income before income taxes	125.5	105.7
Income tax (expense) benefit	(39.8)	(30.5)
Net income	85.7	75.2
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income
Amount Reclassified from Accumulated Other Comprehensive Income
Income before income taxes	(14.0)	(20.0)
Income tax (expense) benefit	4.0	6.0
Net income	(10.0)	(14.0)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Commodity and Foreign Currency Contracts
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	(13.0)	(18.0)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges | Reclassification out of Accumulated Other Comprehensive Income | Interest Rate Contract
Amount Reclassified from Accumulated Other Comprehensive Income
Financing costs, net	(1.0)	(1.0)
Accumulated Defined Benefit Plans Adjustment | Reclassification out of Accumulated Other Comprehensive Income
Amount Reclassified from Accumulated Other Comprehensive Income
Losses related to pension and other postretirement obligations		$ (1)