NET EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Dec. 29, 2017	Dec. 30, 2016
Earnings Per Share [Abstract]
Net earnings attributable to Varex	$ 11.3	$ 11.1
Weighted average number of shares outstanding, basic	37.7	37.4
Dilutive effect of potential common shares	0.5	0.3
Weighted average number of shares outstanding,diluted	38.2	37.7
Earnings per share, basic (in USD per share)	$ 0.30	$ 0.30
Earnings per share, diluted (in USD per share)	$ 0.30	$ 0.29
Anti-dilutive employee shared based awards, excluded	1.0	0.7