Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2022
Goodwill, Gross	$ 1,080,423	$ 1,082,439	$ 1,075,102
Goodwill, Accumulated Impairment Loss	810,872	810,872	810,872
Goodwill	269,551	271,567	264,230
Goodwill, Period Increase (Decrease)	5,321
Metal Cutting [Member]
Goodwill, Gross	447,212	449,228	441,891
Goodwill, Accumulated Impairment Loss	(177,661)	(177,661)	(177,661)
Goodwill	269,551	271,567	264,230
Goodwill, Period Increase (Decrease)	5,321
Infrastructure [Member]
Goodwill, Gross	633,211	633,211	633,211
Goodwill, Accumulated Impairment Loss	(633,211)	(633,211)	(633,211)
Goodwill	0	$ 0	$ 0
Goodwill, Period Increase (Decrease)	$ 0

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

KENNAMETAL INC 10-K