Restructuring - Schedule of Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Cash restructuring charges
Severance and other personnel costs	$ 1.5	$ 0.2	$ 0.3	$ 0.3
Exit and disposal costs and professional fees	2.5	2.2	10.1	8.3
Total cash restructuring charges	4.1	2.4	10.4	8.6
Non-cash restructuring charges
Asset write-downs and write-offs	3.7	1.7	11.6	22.4
Stock-based compensation expense	0.0	0.0	0.8	0.0
Total non-cash restructuring charges	3.7	1.7	12.4	22.4
Total	$ 7.8	$ 4.1	$ 22.8	$ 31.0

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration