SEGMENT INFORMATION (Details) $ in Millions	3 Months Ended
	Dec. 29, 2017 USD ($) segment	Dec. 30, 2016 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Revenues	$ 176.2	$ 157.4
Gross profit	61.5	58.8
Total operating expenses	47.9	40.2
Interest and other income (expenses), net	(6.5)	(0.3)
Earnings before taxes	7.1	18.3
(Benefit) taxes on earnings	(4.3)	7.1
Net earnings	11.4	11.2
Less: Net earnings attributable to noncontrolling interests	0.1	0.1
Net earnings attributable to Varex	11.3	11.1
Operating Segments | Medical
Segment Reporting Information [Line Items]
Revenues	139.2	131.7
Gross profit	46.4	47.1
Operating Segments | Industrial
Segment Reporting Information [Line Items]
Revenues	37.0	25.7
Gross profit	$ 15.1	$ 11.7