Business realignment charges - Business realignment charges (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2017 USD ($) employee	Mar. 31, 2016 USD ($) employee	Mar. 31, 2017 USD ($) employee	Mar. 31, 2016 USD ($) employee
Operating Segments | Diversified Industrial
Realignment charges
Realignment charges	$ 14,605	$ 24,406	$ 32,164	$ 67,405
Realignment charges, number of positions eliminated | employee	312	875	642	2,929
Operating Segments | Aerospace Systems
Realignment charges
Realignment charges	$ 1,713	$ 624	$ 2,796	$ 2,604
Realignment charges, number of positions eliminated | employee	52	15	89	81
Corporate general and administrative expenses
Realignment charges
Realignment charges	$ 0	$ 2,049	$ 0	$ 2,129
Realignment charges, number of positions eliminated | employee	0	50	0	52
Other expense
Realignment charges
Realignment charges	$ 0	$ 0	$ 0	$ 116