Schedule II - Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for doubtful accounts and sales allowances
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 12.7	$ 14.5	$ 12.4
Additions charged to costs and expenses	11.9	4.3	1.8
Deductions	(7.3)	(5.9)	(2.8)
Other	5.8	(0.2)	3.1
Balance at end of year	23.1	12.7	14.5
Reserve for inventory obsolescence
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	38.1	37.2	34.0
Additions charged to costs and expenses	6.7	5.3	10.1
Deductions	(4.5)	(6.3)	(6.6)
Other	(10.0)	1.9	(0.3)
Balance at end of year	$ 30.3	$ 38.1	$ 37.2