Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 19.6		$ 25.4		$ 25.0
Charged to costs and expenses	0.9		(0.3)		0.6
Deductions	0.4	[1]	(5.5)	[1]	(0.2)	[1]
Balance at end of period	20.9		19.6		25.4
Deferred Tax Asset Valuation Allowance [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	19.3		24.9		24.3
Charged to costs and expenses	0.6		(0.2)		0.8
Deductions	0.5	[1]	(5.4)	[1]	(0.2)	[1]
Balance at end of period	20.4		19.3		24.9
Allowance for Doubtful Accounts Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	0.3		0.5		0.7
Charged to costs and expenses	0.3		(0.1)		(0.2)
Deductions	(0.1)	[1]	(0.1)	[1]	0	[1]
Balance at end of period	$ 0.5		$ 0.3		$ 0.5

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