Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 24.3		$ 20.9		$ 19.6
Charged to costs and expenses	(0.5)		2.8		0.9
Deductions	(0.8)	[1]	0.6	[1]	0.4	[1]
Balance at end of period	23.0		24.3		20.9
Deferred Tax Asset Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	23.5		20.4		19.3
Charged to costs and expenses	(0.9)		2.8		0.6
Deductions	(0.5)	[1]	0.3	[1]	0.5	[1]
Balance at end of period	22.1		23.5		20.4
Allowance for Doubtful Accounts Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	0.8		0.5		0.3
Charged to costs and expenses	0.4		0		0.3
Deductions	(0.3)	[1]	0.3	[1]	0	[1]
Balance at end of period	$ 0.9		$ 0.8		$ 0.5

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