Interest Expense, Net - Components of Interest Expense, Net (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Other Income and Expenses [Abstract] | |||
| Interest expense on borrowings | $ (45.9) | $ (42.4) | $ (44.7) |
| Interest income | (4.2) | (3.8) | (2.0) |
| Interest expense, net | $ (41.8) | $ (38.6) | $ (42.7) |