Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Prepaid Expense and Other Assets, Current [Abstract]
Deferred tax assets (Note 6)	$ 122.1	$ 204.7
Prepaid taxes and tax refunds receivable	102.0	165.7
Prepaid brochure costs, paper and other literature	72.3	77.6
Receivables other than trade	67.5	72.5
Short-term investments	36.8	21.0
Other	80.0	76.8
Prepaid expenses and other	$ 480.7	$ 618.3