Valuation and Qualifying Accounts and Reserves of Continuing Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Allowance for Doubtful Accounts Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 64.8	$ 93.4	$ 76.7
Charges to Costs and Expenses	11.6	5.2	24.1
Charges to Other Accounts	0		13.6
Deductions(1)	20.8	33.8	21.0
Balance at End of Period	55.6	64.8	93.4
Valuation Allowance for Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	23.2	16.1	11.7
Charges to Costs and Expenses	1.9	7.1	4.4
Charges to Other Accounts	0
Deductions(1)	0
Balance at End of Period	$ 25.1	$ 23.2	$ 16.1