Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Prepaid Expense and Other Assets, Current [Abstract]
Deferred tax assets	$ 188.0	$ 204.7
Prepaid taxes and tax refunds receivable	139.1	165.7
Prepaid brochure costs, paper and other literature	67.9	77.6
Receivables other than trade	67.8	72.5
Insurance receivable (Note 5)	64.1	0.0
Short-term investments	32.5	21.0
Other	72.9	76.8
Prepaid expenses and other	$ 632.3	$ 618.3