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Accounts Receivable, net - Revenue reserve information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
	Jul. 01, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Accounts receivable, net
Settlement payment				$ 9.4
Reimbursement of overpayment				$ 8.1
ASU 2014-09
Accounts receivable, net
Net adjustment to opening retained earnings and accounts receivable	$ 3.2
Failure-to-supply reserves offset	3.5
Timing of recognition of contract manufacturing arrangements	$ 0.3
Chargebacks
Accounts receivable, net
Percentage of provision for rebates, chargebacks, returns and other adjustments on gross sales		45.10%	46.70%	47.80%	51.50%
Rebates
Accounts receivable, net
Percentage of provision for rebates, chargebacks, returns and other adjustments on gross sales		14.30%	10.60%	14.20%	12.00%
Returns
Accounts receivable, net
Percentage of provision for rebates, chargebacks, returns and other adjustments on gross sales		1.40%	2.60%	1.30%	1.90%
Other
Accounts receivable, net
Percentage of provision for rebates, chargebacks, returns and other adjustments on gross sales		8.00%	5.40%	6.10%	3.70%