Business realignment charges - Income statement location (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Cost of sales
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	$ 3,669	$ 13,657	$ 8,068	$ 22,772
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	3,713	11,719	7,872	16,630
Other (income) expense, net
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	$ 220	$ 0	$ 275	$ 0