Revenue recognition - Revenues by segment and by platform (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 3,687,518	$ 3,749,591	$ 10,638,857	$ 10,484,915
Diversified Industrial Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts	3,035,420		8,805,968
Diversified Industrial Segment | Motion Systems
Disaggregation of Revenue [Line Items]
Revenues from contracts	899,948		2,615,878
Diversified Industrial Segment | Flow and Process Control
Disaggregation of Revenue [Line Items]
Revenues from contracts	1,105,176		3,181,440
Diversified Industrial Segment | Filtration and Engineered Materials
Disaggregation of Revenue [Line Items]
Revenues from contracts	1,030,296		3,008,650
Aerospace Systems Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts	652,098		1,832,889
Aerospace Systems Segment | Flight Control Actuation
Disaggregation of Revenue [Line Items]
Revenues from contracts	191,664		544,270
Aerospace Systems Segment | Fuel and Inerting
Disaggregation of Revenue [Line Items]
Revenues from contracts	165,642		466,950
Aerospace Systems Segment | Hydraulics
Disaggregation of Revenue [Line Items]
Revenues from contracts	123,416		334,806
Aerospace Systems Segment | Engines
Disaggregation of Revenue [Line Items]
Revenues from contracts	71,779		207,812
Aerospace Systems Segment | Fluid Conveyance
Disaggregation of Revenue [Line Items]
Revenues from contracts	79,299		218,371
Aerospace Systems Segment | Other
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 20,298		$ 60,680