SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Narrative (Details) $ in Millions		9 Months Ended
	Jan. 28, 2017	Jun. 30, 2017 segment	Sep. 30, 2016 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of segments | segment		2
Prepaid Expenses and Other Current Assets | Accounting Standards Update 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs			$ (0.6)
Other Assets | Accounting Standards Update 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs			(0.6)
Short-term Debt | Accounting Standards Update 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs			0.6
Long-term Debt | Accounting Standards Update 2015-03
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred finance costs			$ 0.6
Varex Imaging | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Pro rata distribution (shares)	0.4