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
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of Period	$ 11.6	$ 14.0	$ 17.2
Charge (benefit) to Expense	13.9	13.9	15.2
Charged to Other Accounts	0	0	0
Deductions	12.2	16.3	18.4
End of Period	13.3	11.6	14.0
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning of Period	58.4	60.0	67.2
Charge (benefit) to Expense	(1.7)	(2.9)	(7.8)
Charged to Other Accounts	0.1	1.3	0.6
Deductions	0	0	0
End of Period	$ 56.8	$ 58.4	$ 60.0