Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		$ 20.7	$ 23.0	$ 24.3
Charged to costs and expenses		(1.3)	(0.2)	(0.5)
Deductions	[1]	(0.3)	(2.1)	(0.8)
Balance at end of period		19.1	20.7	23.0
Deferred Tax Asset Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		20.1	22.1	23.5
Charged to costs and expenses		(1.3)	(0.3)	(0.9)
Deductions	[1]	(0.1)	(1.7)	(0.5)
Balance at end of period		18.7	20.1	22.1
Allowance for Doubtful Accounts Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		0.6	0.9	0.8
Charged to costs and expenses		0.0	0.1	0.4
Deductions	[1]	(0.2)	(0.4)	(0.3)
Balance at end of period		$ 0.4	$ 0.6	$ 0.9

[1] Includes accounts receivable written off, the write-off or write-down of valuation allowances, and translation adjustments.