Valuation and Qualifying Accounts (Details) (Doubtful Accounts [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Doubtful Accounts [Member]
Valuation and Qualifying Accounts
Balance at Beginning of Period	$ 14.4	$ 18.8	$ 20.0
Additions Charged (Credited) to Expense	4.5	(1.0)	0.1
Deductions to Reserve	(1.7)	(3.1)	(1.8)
Effects of Foreign Currency		(0.6)	0.5
Acquired Allowances		0.3
Balance at End of Period	$ 17.2	$ 14.4	$ 18.8