Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Operating lease cost	$ 39.5	$ 34.8	$ 118.6	$ 121.3
Short-term lease cost	0.3	1.6	1.0	5.6
Variable lease cost	2.5	2.9	6.8	4.9
Total operating lease cost	$ 42.3	$ 39.3	$ 126.4	$ 131.8