Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of Period	$ 14.0	$ 17.2	$ 18.0
Charge (benefit) to Expense	13.9	15.2	22.3
Charged to Other Accounts	0	0	0
Deductions	16.3	18.4	23.1
End of Period	11.6	14.0	17.2
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of Period	60.0	67.2	72.9
Charge (benefit) to Expense	(2.9)	(7.8)	(5.7)
Charged to Other Accounts	1.3	0.6	0
Deductions	0	0	0
End of Period	$ 58.4	$ 60.0	$ 67.2