Changes in Accumulated Other Comprehensive Income/(Loss) by Component - Summary of Changes in Accumulated Balances for Each Component of Accumulated Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	$ 1,903.7	$ 1,753.8	$ 1,919.1	$ 1,809.1
Other comprehensive income/(loss) before reclassifications	(112.0)	(31.8)	(135.1)	(102.6)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.2	0.7	0.5	1.4
Balance	1,786.6	1,748.1	1,786.6	1,748.1
Foreign Currency Translation
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(237.2)	(37.9)	(214.1)	32.9
Other comprehensive income/(loss) before reclassifications	(112.0)	(31.8)	(135.1)	(102.6)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0	0.0	0.0	0.0
Balance	(349.2)	(69.7)	(349.2)	(69.7)
Pension and Post- Retirement Liabilities
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(4.8)	(14.9)	(4.8)	(15.4)
Other comprehensive income/(loss) before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0	0.5	0.0	1.0
Balance	(4.8)	(14.4)	(4.8)	(14.4)
Cash Flow Hedge
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(7.2)	(8.1)	(7.4)	(8.2)
Other comprehensive income/(loss) before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.2	0.2	0.4	0.4
Balance	(6.9)	(7.8)	(6.9)	(7.8)
Accumulated Other Comprehensive Income (Loss)
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(249.2)	(60.9)	(226.3)	9.2
Balance	$ (361.0)	$ (91.9)	$ (361.0)	$ (91.9)