SEGMENTS - Net Sales by Reportable Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information [Line Items]
NET SALES	$ 1,465	$ 993
Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	752	560
Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	674	399
Operating Segments | Non- aviation
Segment Reporting Information [Line Items]
NET SALES	39	34
Commercial OEM [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	184	133
Commercial OEM [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	230	133
Commercial Aftermarket [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	220	157
Commercial Aftermarket [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	245	177
Defense [Member] | Operating Segments | Power & Control
Segment Reporting Information [Line Items]
NET SALES	348	270
Defense [Member] | Operating Segments | Airframe
Segment Reporting Information [Line Items]
NET SALES	$ 199	$ 89