CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (51,749)	$ (2,193)	$ (64,835)	$ (18,414)
Other comprehensive (loss) income, net of tax:
Unrealized losses on derivative instruments designated as cash flow hedges, net of tax	(5,905)	(2,430)	(11,254)	(4,255)
Gains (losses) on derivative instruments designated as cash flow hedges reclassified to cost of goods sold, net of tax	3,201	438	6,311	(426)
Change in funded status of retiree benefit obligations, net of tax	(1,943)	0	(7,594)	0
Pension settlement charge, net of tax	2,801	0	10,948	0
Total comprehensive loss, net of tax	$ (53,595)	$ (4,185)	$ (66,424)	$ (23,095)