Prepaid Expenses and Other Current Assets - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions |
Jun. 30, 2017 |
Jun. 30, 2016 |
|---|---|---|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | ||
| Partner incentive program receivable | $ 26.2 | $ 27.3 |
| Prepaid income taxes | 0.0 | 10.4 |
| Deferred product costs and other current assets | 37.2 | 30.5 |
| Total prepaid expenses and other current assets | $ 63.4 | $ 68.2 |