Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from parent as a source of financing that is recorded as additional paid in capital.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

+ Details

Name:	us-gaap_ProceedsFromContributionsFromParent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Debt Instrument, Periodic Payment, Percentage

+ References

No definition available.

+ Details

Name:	var_DebtInstrumentPeriodicPaymentPercentage
Namespace Prefix:	var_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Accordion Feature, Increase Limit

+ References

No definition available.

+ Details

Name:	var_LineofCreditFacilityAccordionFeatureIncreaseLimit
Namespace Prefix:	var_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_FederalFundsEffectiveSwapRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	var_DebtRepaymentPeriodAxis=var_DebtInstrumentRepaymentPeriodOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	var_DebtRepaymentPeriodAxis=var_DebtInstrumentRepaymentPeriodTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	var_DebtRepaymentPeriodAxis=var_DebtInstrumentRepaymentPeriodThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	var_DebtRepaymentPeriodAxis=var_DebtInstrumentRepaymentPeriodFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	var_DebtRepaymentPeriodAxis=var_DebtInstrumentRepaymentPeriodFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

BORROWINGS (Details) - USD ($)		3 Months Ended
BORROWINGS (Details) - USD ($)	Jan. 25, 2017	Dec. 30, 2016	Jan. 01, 2016	Feb. 23, 2017
Line of Credit Facility [Line Items]
Net transfers from (to) parent		$ 1,800,000	$ 9,500,000
Subsequent Event \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 100,000,000
Debt instrument, term	5 years
Subsequent Event \| Secured Debt
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 200,000,000
Debt instrument, term	5 years
Net transfers from (to) parent	$ (200,000,000)
Proceeds from lines of credit	$ 203,000,000
Subsequent Event \| Line of Credit
Line of Credit Facility [Line Items]
Used capacity, commitment fee percentage	0.125%
Federal Funds Effective Swap Rate \| Subsequent Event \| Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
London Interbank Offered Rate (LIBOR) \| Subsequent Event \| Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Minimum \| Subsequent Event \| Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.125%
Unused capacity, commitment fee percentage	0.20%
Maximum \| Subsequent Event \| Line of Credit
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.125%
Unused capacity, commitment fee percentage	0.40%
Scenario, Forecast \| Line of Credit
Line of Credit Facility [Line Items]
Increase to maximum borrowing capacity				$ 600,000,000
Debt Instrument, Repayment, Period One \| Subsequent Event \| Secured Debt
Line of Credit Facility [Line Items]
Repayment percentage	7.50%
Debt Instrument, Repayment, Period Two \| Subsequent Event \| Secured Debt
Line of Credit Facility [Line Items]
Repayment percentage	7.50%
Debt Instrument, Repayment, Period Three \| Subsequent Event \| Secured Debt
Line of Credit Facility [Line Items]
Repayment percentage	10.00%
Debt Instrument, Repayment, Period Four \| Subsequent Event \| Secured Debt
Line of Credit Facility [Line Items]
Repayment percentage	10.00%
Debt Instrument, Repayment, Period Five \| Subsequent Event \| Secured Debt
Line of Credit Facility [Line Items]
Repayment percentage	15.00%