Acquisitions - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Nov. 16, 2023	Nov. 30, 2024	Nov. 30, 2023	Nov. 30, 2024	Nov. 30, 2023	May 31, 2024
Business Acquisition [Line Items]
Goodwill		$ 79.5		$ 79.5		$ 79.6
Pension liability adjustment		$ 1.0	$ 0.0	$ 1.0	$ 0.0
Voestalpine Automotive Components Nagold GmbH & Co. KG
Business Acquisition [Line Items]
Date of acquisition	Nov. 16, 2023
Business acquisition, name of acquired entity	Voestalpine Automotive Components Nagold GmbH & Co. KG (“Voestalpine Nagold”)
Net cash consideration	$ 21.0
Pension liability	0.9
Property, plant and equipment	12.3
Net working capital	9.0
Goodwill	0.6
Purchase accounting adjustments, property, plant and equipment	0.3
Purchase accounting adjustments, net working capital	(0.8)
Purchase accounting adjustments, goodwill	0.5
Pension liability adjustment	0.0
Voestalpine Automotive Components Nagold GmbH & Co. KG | Property, Plant and Equipment
Business Acquisition [Line Items]
Purchase consideration, net	12.6
Voestalpine Automotive Components Nagold GmbH & Co. KG | Net Working Capital
Business Acquisition [Line Items]
Purchase consideration, net	8.2
Voestalpine Automotive Components Nagold GmbH & Co. KG | Goodwill
Business Acquisition [Line Items]
Purchase consideration, net	$ 1.1