LEASES - Supplemental Unaudited Condensed Consolidated Balance Sheet Information related to leases (Details) - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Assets
Right-of-use operating lease assets	$ 499.2
Finance lease assets	$ 153.8
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Property Plant And Equipment Net
Total leased assets	$ 653.0
Current liabilities
Operating lease obligations, current	$ 127.2	$ 10.0
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Long Term Debt Current
Finance lease obligations, current	$ 9.5	10.0
Noncurrent
Operating lease liabilities, non-current	387.4
Finance lease obligation, non-current	176.0	$ 172.2
Total lease liabilities	$ 700.1
Operating leases	7 years 1 month 6 days
Finance leases	11 years 10 months 24 days
Operating leases	3.95%
Finance leases	5.78%