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RELATED-PARTY TRANSACTIONS (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 1994
ECIL-Rapiscan Security Products Limited
Sales to joint venture	$ 6.0	$ 10.4	$ 6.9
ECIL-Rapiscan Security Products Limited
Ownership interest in joint venture (as a percent)					36.00%
Initial investment					$ 0.1
Receivables from joint venture	$ 3.5	1.4
ECIL-Rapiscan Security Products Limited | Executive Chairman
Related party ownership percentage in equity method investee of the reporting entity					10.50%
ECIL-Rapiscan Security Products Limited | President and Chief Executive Officer
Related party ownership percentage in equity method investee of the reporting entity					4.50%
Maximum | ECIL-Rapiscan Security Products Limited
Equity earnings in joint venture		$ 0.1	$ 0.1	$ 0.1
Maximum | ECIL-Rapiscan Security Products Limited | Management
Collective voting power control, by entity and related parties, in equity method investment of entity (as a percent)	50.00%

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