Revenue recognition - Revenues by segment and by platform (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 3,472,045	$ 3,370,673	$ 6,951,339	$ 6,735,324
Diversified Industrial Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts	2,855,738		5,770,548
Diversified Industrial Segment | Motion Systems
Disaggregation of Revenue [Line Items]
Revenues from contracts	856,357		1,715,930
Diversified Industrial Segment | Flow and Process Control
Disaggregation of Revenue [Line Items]
Revenues from contracts	1,015,200		2,076,264
Diversified Industrial Segment | Filtration and Engineered Materials
Disaggregation of Revenue [Line Items]
Revenues from contracts	984,181		1,978,354
Aerospace Systems Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts	616,307		1,180,791
Aerospace Systems Segment | Flight Control Actuation
Disaggregation of Revenue [Line Items]
Revenues from contracts	189,670		352,606
Aerospace Systems Segment | Fuel and Inerting
Disaggregation of Revenue [Line Items]
Revenues from contracts	157,262		301,308
Aerospace Systems Segment | Hydraulics
Disaggregation of Revenue [Line Items]
Revenues from contracts	108,893		211,390
Aerospace Systems Segment | Engines
Disaggregation of Revenue [Line Items]
Revenues from contracts	71,647		136,033
Aerospace Systems Segment | Fluid Conveyance
Disaggregation of Revenue [Line Items]
Revenues from contracts	68,868		139,072
Aerospace Systems Segment | Other
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 19,967		$ 40,382