CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net unrealized derivative (loss) gain on cash flow hedges, tax	$ 1.4	$ (1.1)	$ 1.4
Pension and other post-employment benefits (losses), tax expense (benefit)	$ (3.8)	$ 2.7	$ (4.9)

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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