Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Components Of Prepaid Expenses And Other Current Assets [Line Items]
Deferred tax assets	$ 312.4	$ 319.0
Prepaid taxes and tax refunds receivable	139.1	192.0
Prepaid brochure costs, paper and other literature	119.9	126.9
Receivables other than trade	117.1	142.8
Healthcare trust assets	34.1	0
Short-term investments	17.8	18.0
Derivative Instruments and Hedges, Assets	7.1	18.8
Other	109.1	113.4
Prepaid expenses and other	$ 856.6	$ 930.9