Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid taxes and tax refunds receivable	$ 99.3	$ 96.3
Prepaid brochure costs, paper and other literature	73.2	64.5
Receivables other than trade	68.3	69.6
Other	50.5	65.7
Prepaid expenses and other	$ 291.3	$ 296.1