Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	12 Months Ended
	Jun. 30, 2025 USD ($) facility	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)
Summary of significant accounting policies
Research and development expenditures	$ 26.1	$ 25.6	$ 24.4
Inventory accounted under method other than LIFO	$ 145.2	$ 152.2
Number of former operating facility site that the liability for future costs is discounted to present value (facility) | facility	1
Liability for future costs discount amortization period	20 years
Environmental expenditures, discount rate	6.00%	6.00%
Environmental Loss Contingency, Statement Of Financial Position Extensible Enumeration Not Disclosed Flag	true	true
Environmental expenditures, liability	$ 10.8	$ 10.6
Minimum | Capitalized software
Summary of significant accounting policies
Estimated useful life	3 years
Minimum | Intangible assets
Summary of significant accounting policies
Estimated useful life	15 years
Maximum | Capitalized software
Summary of significant accounting policies
Estimated useful life	15 years
Maximum | Intangible assets
Summary of significant accounting policies
Estimated useful life	30 years