Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Components Of Prepaid Expenses And Other Current Assets [Line Items]
Deferred tax assets	$ 239.1	$ 273.5
Receivables other than trade	141.9	131.9
Prepaid taxes and tax refunds receivable	139.8	141.4
Prepaid brochure costs, paper and other literature	107.7	112.1
Healthcare trust assets	20.6	26.9
Short-term investments	18.4	16.5
Interest-rate swap agreements (Notes 11 and 12)	3.8	19.5
Other	115.8	110.2
Prepaid expenses and other	$ 787.1	$ 832.0