Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid taxes and tax refunds receivable	$ 111.2	$ 96.3
Prepaid brochure costs, paper and other literature	68.3	64.5
Receivables other than trade	89.7	69.6
Short-term investments	1.9	2.4
Other	60.1	63.3
Prepaid expenses and other	$ 331.2	$ 296.1