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

Reflects the net positive or negative amount derived from subtracting from net proceeds of sale the carrying amounts, net of allocated reserves, of notes receivable transferred to a third party in a transaction that qualifies for sales treatment.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=82924980&loc=d3e107425-111719

Name:	us-gaap_GainLossOnSaleOfNotesReceivable
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash inflow associated with the sale of loans receivables arising from the financing of goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3179-108585

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

Accounts receivable from variable interest entity.

No definition available.

Name:	var_AccountsReceivableFromVariableInterestEntity
Namespace Prefix:	var_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Financing Receivable, Aggregate Principal Amount Funded

No definition available.

Name:	var_FinancingReceivableAggregatePrincipalAmountFunded
Namespace Prefix:	var_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Financing Receivable, Discount On Sale Proceeds

No definition available.

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

Financing Receivable, Stated Rate

No definition available.

Name:	var_FinancingReceivableStatedRate
Namespace Prefix:	var_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Financing Receivable, Term

No definition available.

Name:	var_FinancingReceivableTerm
Namespace Prefix:	var_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Maximum Lending Commitment

No definition available.

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

Unbilled Receivables from Variable Interest Entity

No definition available.

Name:	var_UnbilledReceivablesfromVariableInterestEntity
Namespace Prefix:	var_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_CounterpartyNameAxis=var_MMProtonILLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_LoansReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=var_SeniorFirstLienLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=us-gaap_SeniorSubordinatedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CounterpartyNameAxis=var_DeutscheBank1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: