Supplemental Data (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Cost Data:
Repairs and maintenance costs	$ 101.4	$ 74.6	$ 68.9
Noncash investing and financing activities:
Noncash purchases of property, plant, equipment and software	13.6	7.6	7.3
Cash paid during the year for:
Interest payments, net	50.9	40.5	28.2
Income tax payments (refunds), net	$ 9.9	$ (46.1)	$ 2.1