CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Sep. 27, 2019
Income Statement [Abstract]
Revenues, net	$ 818.1	$ 738.3	$ 780.6
Cost of revenues	546.6	548.1	523.9
Gross profit	271.5	190.2	256.7
Operating expenses:
Research and development	71.9	78.9	78.1
Selling, general and administrative	125.5	142.2	128.1
Impairment of intangible assets	0.0	2.8	4.8
Total operating expenses	197.4	223.9	211.0
Operating income (loss)	74.1	(33.7)	45.7
Interest income	0.1	0.1	0.1
Interest expense	(42.1)	(31.4)	(21.1)
Other expense, net	(3.5)	(7.6)	(3.2)
Interest and other expense, net	(45.5)	(38.9)	(24.2)
Income (loss) before taxes	28.6	(72.6)	21.5
Income tax expense (benefit)	10.7	(15.2)	5.7
Net income (loss)	17.9	(57.4)	15.8
Less: Net income attributable to noncontrolling interests	0.5	0.5	0.3
Net income (loss) attributable to Varex	$ 17.4	$ (57.9)	$ 15.5
Net income (loss) per common share attributable to Varex
Basic (in USD per share)	$ 0.44	$ (1.49)	$ 0.41
Diluted (in USD per share)	$ 0.43	$ (1.49)	$ 0.40
Weighted average common shares outstanding
Basic (in shares)	39.3	38.8	38.2
Diluted (in shares)	40.3	38.8	38.6