Accounts Receivable - Provisions (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Chargebacks
Accounts receivable
Provisions	$ 221.7	$ 323.1	$ 834.3	$ 798.0
Rebates
Accounts receivable
Provisions	50.4	72.0	194.0	228.1
Returns
Accounts receivable
Provisions	12.4	7.1	31.1	21.7
Other
Accounts receivable
Provisions	$ 25.6	$ 23.7	$ 60.2	$ 52.3