Supplemental Data (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Cost Data:
Repairs and maintenance costs	$ 74.6	$ 68.9	$ 117.4
Noncash investing and financing activities:
Noncash purchases of property, plant, equipment and software	7.6	7.3	11.6
Cash paid during the year for:
Interest payments, net	40.5	28.2	27.0
Income tax (refunds) payments, net	$ (46.1)	$ 2.1	$ 29.8