Leases - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2019	Dec. 31, 2019
Leases [Abstract]
Operating Lease, Cost	$ 42.3	$ 86.5
Short-term lease cost	1.2	3.9
Variable lease cost	0.7	2.0
Operating lease cost	$ 44.2	$ 92.4