NET LOSS PER SHARE - Reconciliation of Numerator and Denominator for Basic and Diluted Net (Loss) Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
Jan. 03, 2025	Dec. 29, 2023
Net loss per share - basic
Net income (loss) attributable to Varex - basic	$ (0.3)	$ (0.5)
Basic weighted average shares outstanding (in shares)	41.1	40.6
Basic net income per share attributable to Varex (in USD per share)	$ (0.01)	$ (0.01)
Net loss per share - diluted
Net income (loss) attributable to Varex - diluted	$ (0.3)	$ (0.5)
Dilutive effect of share-based awards and other (in shares)	0.0	0.0
Diluted weighted average shares outstanding (in shares)	41.1	40.6
Diluted net income per share attributable to Varex (in USD per share)	$ (0.01)	$ (0.01)
Anti-dilutive shares (in shares)	22.6	22.8
Share-based awards and other
Net loss per share - diluted
Anti-dilutive shares (in shares)	3.4	3.6
Convertible notes
Net loss per share - diluted
Anti-dilutive shares (in shares)	9.6	9.6
Warrants
Net loss per share - diluted
Anti-dilutive shares (in shares)	9.6	9.6

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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