Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Assets:
Operating lease ROU assets	$ 262.0	$ 292.6
Liabilities:
Operating lease liabilities	40.2	35.3
Operating lease liabilities - Non-current	263.1	288.3
Total Operating lease liabilities	$ 303.3	$ 323.5
Operating lease ROU assets extensible list	us-gaap:OtherAssets	us-gaap:OtherAssets
Operating lease liabilities - Current, extensible list	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Operating lease liabilities - Non- current, extensible list	Other non-current liabilities	Other non-current liabilities