Accumulated Other Comprehensive Income (Loss) - Change in AOCI Balances (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Selling, general and administrative expense	$ 77.0	$ 58.0	$ 147.5	$ 111.9
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance			179.9
Ending balance	402.7		402.7
Provision for income taxes	8.1	8.9	7.6	11.4
Interest expense, net	3.3	2.2	6.7	4.2
AOCI Attributable to Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(151.5)	(141.3)	(157.0)	(147.2)
Other comprehensive income (loss) before reclassification	8.4	(4.8)	12.9	0.3
Amounts reclassified from accumulated other comprehensive income	1.0	0.8	2.0	1.6
Ending balance	(142.1)	(145.3)	(142.1)	(145.3)
Pension and Other Postretirement Benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(107.8)	(103.3)	(108.6)	(103.8)
Other comprehensive income (loss) before reclassification	0.0	0.1	0.0	0.0
Amounts reclassified from accumulated other comprehensive income	0.8	0.6	1.6	1.2
Ending balance	(107.0)	(102.6)	(107.0)	(102.6)
Derivatives Designated as Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0.3	(3.0)	(0.1)	(0.8)
Other comprehensive income (loss) before reclassification	(0.3)	(1.2)	(0.1)	(3.6)
Amounts reclassified from accumulated other comprehensive income	0.2	0.2	0.4	0.4
Ending balance	0.2	(4.0)	0.2	(4.0)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(44.0)	(35.0)	(48.3)	(42.6)
Other comprehensive income (loss) before reclassification	8.7	(3.7)	13.0	3.9
Amounts reclassified from accumulated other comprehensive income	0.0	0.0	0.0	0.0
Ending balance	(35.3)	(38.7)	(35.3)	(38.7)
Reclassification out of Accumulated Other Comprehensive Income | Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Selling, general and administrative expense	1.3	0.9	2.6	1.8
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Provision for income taxes	0.5	0.3	1.0	0.6
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Designated as Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Provision for income taxes	0.1	0.1	0.3	0.2
Interest expense, net	$ 0.3	$ 0.3	$ 0.7	$ 0.6