Accumulated Other Comprehensive Loss Reclassifications Out of Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold									$ 2,250.4	$ 2,113.4	$ 2,032.2
Income before income taxes									485.5	473.8	441.8
Provision for income taxes									(158.3)	(144.0)	(139.7)
Net income	80.6	90.5	90.8	65.3	82.8	97.2	83.0	66.8	327.2	329.8	302.1
Cash flow hedges gain (loss):
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of goods sold									1.0	0.4
Income before income taxes									1.0	0.4
Provision for income taxes									(0.3)	(0.1)
Net income									0.7	0.3
Amortization of defined benefit pension and post retirement benefit items:
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior-service costs									0.8	0.8
Actuarial gains/(losses)									(3.8)	(13.7)
Income before income taxes									(3.0)	(12.9)
Provision for income taxes									0.9	4.6
Net income									(2.1)	(8.3)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income									$ (1.4)	$ (8.0)