Comprehensive Income (Reclassification out of AOCL) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold; Selling, general and administrative expenses	$ (738.6)	$ (699.7)	$ (2,082.4)	$ (1,935.5)
Income tax (expense)/benefit	(43.0)	(48.2)	(103.8)	(104.0)
Reclassification out of Accumulated Other Comprehensive Loss [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net of tax	1.1	(2.6)	2.5	(10.0)
Reclassification out of Accumulated Other Comprehensive Loss [Member] | (Losses)/Gains on Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (expense)/benefit	(1.3)	0.8	(3.4)	3.7
Net of tax	2.2	(1.6)	6.0	(6.9)
Reclassification out of Accumulated Other Comprehensive Loss [Member] | (Losses)/Gains on Cash Flow Hedges [Member] | Commodity Futures Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold; Selling, general and administrative expenses	3.5	(2.4)	9.4	(10.6)
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Defined Benefit Plan Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold; Selling, general and administrative expenses	(1.8)	(1.6)	(5.5)	(4.8)
Income tax (expense)/benefit	0.7	0.6	2.0	1.7
Net of tax	$ (1.1)	$ (1.0)	$ (3.5)	$ (3.1)