Revenue recognition - Revenues by segment and by platform (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 3,411,905	$ 3,497,974	$ 6,642,445	$ 6,832,485
Diversified Industrial Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts	2,826,502	2,762,936	5,483,864	5,466,391
Diversified Industrial Segment | Motion Systems
Disaggregation of Revenue [Line Items]
Revenues from contracts	720,315	752,306	1,377,456	1,519,120
Diversified Industrial Segment | Flow and Process Control
Disaggregation of Revenue [Line Items]
Revenues from contracts	949,949	942,249	1,874,074	1,953,604
Diversified Industrial Segment | Filtration and Engineered Materials
Disaggregation of Revenue [Line Items]
Revenues from contracts	1,156,238	1,068,381	2,232,334	1,993,667
Aerospace Systems Segment
Disaggregation of Revenue [Line Items]
Revenues from contracts	585,403	735,038	1,158,581	1,366,094
Aerospace Systems Segment | Flight Control Actuation
Disaggregation of Revenue [Line Items]
Revenues from contracts	167,263	180,423	325,365	353,682
Aerospace Systems Segment | Fuel, Inerting and Engine Motion Control
Disaggregation of Revenue [Line Items]
Revenues from contracts	136,107	159,474	255,070	311,687
Aerospace Systems Segment | Hydraulics
Disaggregation of Revenue [Line Items]
Revenues from contracts	70,845	110,385	146,763	218,760
Aerospace Systems Segment | Engine Components
Disaggregation of Revenue [Line Items]
Revenues from contracts	141,264	179,605	290,301	273,400
Aerospace Systems Segment | Airframe and Engine Fluid Conveyance
Disaggregation of Revenue [Line Items]
Revenues from contracts	45,186	79,123	92,548	163,802
Aerospace Systems Segment | Other
Disaggregation of Revenue [Line Items]
Revenues from contracts	$ 24,738	$ 26,028	$ 48,534	$ 44,763