CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (39,777)	$ (51,749)	$ (27,369)	$ (64,835)
Other comprehensive (loss) income, net of tax:
Unrealized losses on derivative instruments designated as cash flow hedges, net of tax	(7,680)	(5,905)	(285)	(11,254)
Losses on derivative instruments designated as cash flow hedges reclassified to cost of goods sold and interest expense, net of tax	2,042	3,201	9,290	6,311
Change in retiree benefit obligations, net of tax	(1,416)	1,943	(1,416)	7,594
Postretirement benefits curtailment and pension settlement charge, net of taxes	4,296	2,801	4,296	10,948
Total comprehensive loss, net of tax	$ (39,703)	$ (53,595)	$ (12,652)	$ (66,424)