Accumulated Other Comprehensive Loss (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	$ (1,186.8)	$ (1,357.4)	$ (2,294.1)	$ (2,635.7)
Financing costs, net	(17.2)	(16.3)	(33.8)	(33.0)
Income before income taxes	145.4	123.8	251.1	282.2
Income tax (expense) benefit	(40.8)	(27.1)	(71.3)	(73.5)
Net income	104.6	96.7	179.8	208.7
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Amount Reclassified from Accumulated Other Comprehensive Income
Income before income taxes	(1.0)	(7.0)	(21.0)	9.0
Income tax (expense) benefit		2.0	6.0	(4.0)
Net income	(1.0)	(5.0)	(15.0)	5.0
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Commodity And Foreign Currency Contracts [Member]
Amount Reclassified from Accumulated Other Comprehensive Income
Cost of sales	1.0	(4.0)	(17.0)	15.0
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member] | Interest Rate Contract [Member]
Amount Reclassified from Accumulated Other Comprehensive Income
Financing costs, net	(1.0)	(1.0)	(2.0)	(2.0)
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Amount Reclassified from Accumulated Other Comprehensive Income
Losses related to pension and other postretirement obligations	$ (1)	$ (2)	$ (2)	$ (4)