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, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	$ 1,753.8	$ 1,413.8	$ 1,809.1	$ 1,346.5
Other comprehensive income/(loss) before reclassifications	(31.8)	5.2	(102.6)	42.1
Amounts reclassified from accumulated other comprehensive income/(loss)	0.7	0.6	1.4	1.2
Balance	1,748.1	1,434.0	1,748.1	1,434.0
Foreign Currency Translation
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(37.9)	(47.7)	32.9	(84.7)
Other comprehensive income/(loss) before reclassifications	(31.8)	5.2	(102.6)	42.1
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0	0.0	0.0	0.0
Balance	(69.7)	(42.6)	(69.7)	(42.6)
Pension and Post- Retirement Liabilities
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(14.9)	(15.1)	(15.4)	(15.7)
Other comprehensive income/(loss) before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.5	0.6	1.0	1.2
Balance	(14.4)	(14.5)	(14.4)	(14.5)
Cash Flow Hedge
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(8.1)	0.0	(8.2)	0.0
Other comprehensive income/(loss) before reclassifications	0.0	0.0	0.0	0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.2	0.0	0.4	0.0
Balance	(7.8)	0.0	(7.8)	0.0
Accumulated Other Comprehensive Income (Loss)
Changes In Accumulated Other Comprehensive Income [Roll Forward]
Balance	(60.9)	(62.9)	9.2	(100.4)
Balance	$ (91.9)	$ (57.1)	$ (91.9)	$ (57.1)