Segment Information Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment income	$ 122.6	$ 129.2	$ 215.3	$ 191.1
Restructuring and other	(25.0)	(5.9)	(30.6)	(17.5)
Intangible amortization	(9.1)	(9.3)	(18.4)	(18.0)
Loss on sale of business	(0.9)	0.0	(6.2)	0.0
Loss on early extinguishment of debt	17.1	101.4	17.1	101.4
Other (income) expense		0.9		2.1
Income from continuing operations before income taxes	98.7	1.6	172.2	27.3
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment income	164.1	151.6	281.1	248.6
Segment Reconciling Items [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring and other	(25.0)	(5.9)	(30.6)	(17.5)
Intangible amortization	(9.1)	(9.3)	(18.4)	(18.0)
Loss on sale of business	(0.9)	0.0	(6.2)	0.0
Loss on early extinguishment of debt	17.1	101.4	17.1	101.4
Corporate allocations	(2.2)	(6.8)	(11.0)	(21.4)
Net interest expense	(10.1)	(25.3)	(23.6)	(60.3)
Other (income) expense	$ (1.0)	$ (1.3)	$ (2.0)	$ (2.7)