CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Retained Earnings	Total Varex Equity	Noncontrolling Interests
Common stock, shares, outstanding, beginning balance (in shares) at Sep. 29, 2017		37,600,000
Stockholders' equity, beginning balance at Sep. 29, 2017	$ 379.0	$ 0.4	$ 342.7	$ 0.8	$ 35.1	$ 379.0	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	23.6				23.6	23.6	0.0
Exercise of stock options (in shares)		100,000
Exercise of stock options	2.2		2.2			2.2
Common stock issued upon vesting of restricted shares (in shares)		200,000
Shares withheld on vesting of restricted stock (in shares)		(100,000)
Shares withheld on vesting of restricted stock	(2.3)		(2.3)			(2.3)
Common stock issued under employee stock purchase plan (in shares)		100,000
Common stock issued under employee stock purchase plan	1.5		1.5			1.5
Share-based compensation	4.7		4.7			4.7
Unrealized loss on interest rate swap contracts, net of tax	3.9			3.9		3.9
Common stock, shares, outstanding, ending balance (in shares) at Mar. 30, 2018		37,900,000
Stockholders' equity, ending balance at Mar. 30, 2018	412.6	$ 0.4	348.8	4.7	58.7	412.6	0.0
Common stock, shares, outstanding, beginning balance (in shares) at Dec. 29, 2017		37,700,000
Stockholders' equity, beginning balance at Dec. 29, 2017	397.6	$ 0.4	348.1	2.6	46.5	397.6	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	12.2				12.2	12.2	0.0
Exercise of stock options (in shares)		100,000
Exercise of stock options	0.4		0.4			0.4
Common stock issued upon vesting of restricted shares (in shares)		200,000
Shares withheld on vesting of restricted stock (in shares)		(100,000)
Shares withheld on vesting of restricted stock	(2.3)		(2.3)			(2.3)
Share-based compensation	2.6		2.6			2.6
Unrealized loss on interest rate swap contracts, net of tax	2.1			2.1		2.1
Common stock, shares, outstanding, ending balance (in shares) at Mar. 30, 2018		37,900,000
Stockholders' equity, ending balance at Mar. 30, 2018	412.6	$ 0.4	348.8	4.7	58.7	412.6	0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of adoption of ASC 606	$ (3.5)				(3.5)	(3.5)
Common stock, shares, outstanding, beginning balance (in shares) at Sep. 28, 2018	38,026,597	38,000,000
Stockholders' equity, beginning balance at Sep. 28, 2018	$ 428.3	$ 0.4	357.6	5.8	62.4	426.2	2.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	$ 8.6				8.8	8.8	(0.2)
Exercise of stock options (in shares)	5,000
Exercise of stock options	$ 0.1		0.1			0.1
Common stock issued upon vesting of restricted shares (in shares)		200,000
Shares withheld on vesting of restricted stock (in shares)		(100,000)
Shares withheld on vesting of restricted stock	(2.1)		(2.1)			(2.1)
Common stock issued under employee stock purchase plan (in shares)		100,000
Common stock issued under employee stock purchase plan	1.9		1.9			1.9
Share-based compensation	5.6		5.6			5.6
Unrealized loss on interest rate swap contracts, net of tax	$ (3.7)			(3.7)		(3.7)
Common stock, shares, outstanding, ending balance (in shares) at Mar. 29, 2019	38,249,440	38,200,000
Stockholders' equity, ending balance at Mar. 29, 2019	$ 435.2	$ 0.4	363.1	2.1	67.7	433.3	1.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of adoption of ASC 606	0.6				0.6	0.6
Common stock, shares, outstanding, beginning balance (in shares) at Dec. 28, 2018		38,100,000
Stockholders' equity, beginning balance at Dec. 28, 2018	429.2	$ 0.4	362.1	3.5	61.3	427.3	1.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	5.8				5.8	5.8	0.0
Exercise of stock options	0.1		0.1			0.1
Common stock issued upon vesting of restricted shares (in shares)		200,000
Shares withheld on vesting of restricted stock (in shares)		(100,000)
Shares withheld on vesting of restricted stock	(2.1)		(2.1)			(2.1)
Share-based compensation	3.0		3.0			3.0
Unrealized loss on interest rate swap contracts, net of tax	$ (1.4)			(1.4)		(1.4)
Common stock, shares, outstanding, ending balance (in shares) at Mar. 29, 2019	38,249,440	38,200,000
Stockholders' equity, ending balance at Mar. 29, 2019	$ 435.2	$ 0.4	$ 363.1	$ 2.1	$ 67.7	$ 433.3	$ 1.9