Accounts Receivable - Provisions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Chargebacks
Accounts receivable
Provisions	$ 323.1	$ 247.7	$ 798.0	$ 664.0
Rebates
Accounts receivable
Provisions	72.0	75.9	228.1	218.9
Returns
Accounts receivable
Provisions	7.1	6.6	21.7	21.4
Other
Accounts receivable
Provisions	$ 23.7	$ 12.6	$ 52.3	$ 42.0