Supplemental Balance Sheet Information (Components of Prepaid Expenses and Other) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Prepaid Expense and Other Assets, Current [Abstract]
Deferred tax assets	$ 243.7	$ 233.6
Prepaid taxes and tax refunds receivable	136.5	145.9
Prepaid brochure costs, paper and other literature	80.8	95.7
Receivables other than trade	74.0	86.6
Short-term investments	32.9	31.7
Other	95.4	95.8
Prepaid expenses and other	$ 663.3	$ 689.3