Business realignment charges - Income statement location (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Cost of sales
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	$ 2,804	$ 9,511	$ 10,872	$ 32,283
Selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	1,795	7,723	9,667	24,353
Other (income), net
Restructuring Cost and Reserve [Line Items]
Realignment charges and acquisition integration costs	$ 0	$ 224	$ 275	$ 224