Stockholders' Equity and Equity Instruments - Amount Reclassified from AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost	$ 111.5	$ 33.2	$ 381.7	$ 336.5
Income tax expense (benefit)	12.7	32.7	41.6	50.7
Total reclassifications, net of income taxes	27.0	87.9	100.8	137.4
Reclassifications, net of income taxes [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications, net of income taxes	0.5	0.3	2.2	0.3
Reclassifications, net of income taxes [Member] | Gains and (losses) from cash flow hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost	0.5	(0.1)	2.2	(1.0)
Income tax expense (benefit)	(0.2)	0.1	(0.8)	0.4
Total reclassifications, net of income taxes	0.3	0.0	1.4	(0.6)
Reclassifications, net of income taxes [Member] | Amortization of defined benefit pension [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Product cost	0.3	0.4	1.0	1.2
Income tax expense (benefit)	(0.1)	(0.1)	(0.2)	(0.3)
Total reclassifications, net of income taxes	$ 0.2	$ 0.3	$ 0.8	$ 0.9