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Derivative Financial Instruments (Narrative) (Details) (USD $)
3 Months Ended
Jan. 30, 2015
Jan. 24, 2014
Foreign Currency Contracts Maturing In 2014 [Member]    
Derivative [Line Items]    
Notional amount of derivatives   $ 21,133,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= val_ForeignCurrencyContractsMaturingInTwoThousandFourteenMember
Foreign Currency Contracts Maturing in 2015 [Member]    
Derivative [Line Items]    
Notional amount of derivatives 9,276,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= val_ForeignCurrencyContractsMaturingInTwoThousandFifteenMember
 
Treasury Lock Contracts [Member]    
Derivative [Line Items]    
Notional amount of derivatives 0invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TreasuryLockMember
0invest_DerivativeNotionalAmount
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TreasuryLockMember
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months $ (938,000)us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_TreasuryLockMember