Changes in Accumulated Other Comprehensive Income (Loss) by Component - Summary of Components of AOCI (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,919.1	$ 1,809.1	$ 1,346.5
Other comprehensive income (loss) before reclassifications	(59.3)	(238.5)	107.2
Amounts reclassified from accumulated other comprehensive income/(loss)	0.9	2.8	2.5
Ending balance	2,240.6	1,919.1	1,809.1
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(214.1)	32.9	(84.7)
Other comprehensive income (loss) before reclassifications	(59.4)	(247.0)	117.6
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0	0.0	0.0
Ending balance	(273.6)	(214.1)	32.9
Pension and Post- Retirement Liabilities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(4.8)	(15.4)	(15.7)
Other comprehensive income (loss) before reclassifications	0.1	8.6	(2.1)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.1	2.0	2.4
Ending balance	(4.6)	(4.8)	(15.4)
Cash Flow Hedge
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(7.4)	(8.2)	0.0
Other comprehensive income (loss) before reclassifications	0.0	0.0	(8.3)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.8	0.8	0.1
Ending balance	(6.5)	(7.4)	(8.2)
AOCI Attributable to Parent
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(226.3)	9.2	(100.4)
Ending balance	$ (284.7)	$ (226.3)	$ 9.2