Changes in Accumulated Other Comprehensive Income/(Loss) by Component - Schedule of Components of Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	$ 2,206.4	$ 2,112.7	$ 2,168.2	$ 2,240.6
Other comprehensive income before reclassifications	(48.8)	(49.3)	(19.9)	(65.8)
Amounts reclassified from accumulated other comprehensive income	0.3	0.3	0.6	0.5
Ending balance	2,228.3	2,067.6	2,228.3	2,067.6
Foreign Currency Translation
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(291.4)	(290.1)	(320.3)	(273.6)
Other comprehensive income before reclassifications	(48.8)	(49.3)	(19.9)	(65.8)
Amounts reclassified from accumulated other comprehensive income	0.0	0.0	0.0	0.0
Ending balance	(340.3)	(339.4)	(340.3)	(339.4)
Pension and Post- Retirement Liabilities
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(5.6)	(4.6)	(5.7)	(4.6)
Other comprehensive income before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income	0.1	0.1	0.2	0.1
Ending balance	(5.5)	(4.5)	(5.5)	(4.5)
Cash Flow Hedge
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(5.5)	(6.3)	(5.7)	(6.5)
Other comprehensive income before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income	0.2	0.2	0.4	0.4
Ending balance	(5.3)	(6.1)	(5.3)	(6.1)
Accumulated Other Comprehensive Income (Loss)
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance	(302.5)	(301.0)	(331.7)	(284.7)
Ending balance	$ (351.1)	$ (350.0)	$ (351.1)	$ (350.0)