Accounts Receivable - Provisions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Chargebacks
Accounts receivable
Provisions	$ 220.2	$ 217.7	$ 474.9	$ 416.2
Rebates
Accounts receivable
Provisions	77.6	73.5	156.1	143.0
Returns
Accounts receivable
Provisions	4.1	7.9	14.5	14.7
Other
Accounts receivable
Provisions	$ 16.3	$ 13.9	$ 28.6	$ 29.3