Accounts Receivable - Provisions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Chargebacks
Accounts receivable
Provisions	$ 334.6	$ 220.2	$ 612.6	$ 474.9
Rebates
Accounts receivable
Provisions	78.8	77.6	143.6	156.1
Returns
Accounts receivable
Provisions	11.3	4.1	18.7	14.5
Other
Accounts receivable
Provisions	$ 20.7	$ 16.3	$ 34.6	$ 28.6