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Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Components Of Prepaid Expenses And Other Current Assets    
Deferred tax assets (Note 7) $ 319.0 $ 347.4
Receivables other than trade 142.8 145.9
Prepaid taxes and tax refunds receivable 192.0 247.1
Prepaid brochure costs, paper and other literature 126.9 121.4
Short-term investments 18.0 17.1
Property held for sale 4.7 12.8
Interest-rate swap agreements interest (Notes 8 and 9) 18.8 20.9
Other 108.7 112.6
Prepaid expenses and other $ 930.9 $ 1,025.2