Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2020	Jun. 30, 2020
Payables and Accruals [Abstract]
Operating lease liabilities	$ 268.7	$ 288.3
Post-employment retirement obligations	150.7	144.3
Non-current income taxes	38.3	37.4
Acquisition related contingencies	15.3	17.6
Other	35.7	24.8
Total	$ 508.6	$ 512.4