XML 1038 R71.htm IDEA: XBRL DOCUMENT v2.4.1.9
Pensions And Other Postretirement Benefits (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Oct. 31, 2014
Oct. 25, 2013
Oct. 26, 2012
Defined Benefit Plan Disclosure [Line Items]      
Increase to medical trend rate that would be considered immaterial 1.00%val_IncreaseToMedicalTrendRatesSensitivityAnalysis    
Expected contribution of employer for future period $ 4,549us-gaap_DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear    
Defined Contribution Pension And Other Postretirement Plans Disclosure [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of employee contributions for match, maximum 3.00%val_DefinedContributionPlanEmployerMatch
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_DefinedContributionPensionAndOtherPostretirementPlansDisclosureMember
   
Defined Contribution Plan, Employer Discretionary Contribution Amount 20,981us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_DefinedContributionPensionAndOtherPostretirementPlansDisclosureMember
25,609us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_DefinedContributionPensionAndOtherPostretirementPlansDisclosureMember
27,629us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_DefinedContributionPensionAndOtherPostretirementPlansDisclosureMember
Employee Stock Ownership Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage of employee contributions for match, maximum 3.00%val_DefinedContributionPlanEmployerMatch
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_EmployeeStockOwnershipPlanMember
   
Pension And Post-Retirement Medical Plans [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Contributions made by the employer $ 3,840us-gaap_DefinedBenefitPlanContributionsByEmployer
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_PensionAndPostRetirementMedicalPlansMember
   
Minimum [Member] | Defined Contribution Pension And Other Postretirement Plans Disclosure [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan employer discretionary contribution 4.00%val_DefinedContributionPlanEmployerDiscretionaryContribution
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_DefinedContributionPensionAndOtherPostretirementPlansDisclosureMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Minimum [Member] | Employee Stock Ownership Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage range of discretionary contribution by employer 0.00%val_DefinedContributionPlanEmployerMatchFinancialPerformance
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_EmployeeStockOwnershipPlanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
   
Maximum [Member] | Defined Contribution Pension And Other Postretirement Plans Disclosure [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined contribution plan employer discretionary contribution 13.00%val_DefinedContributionPlanEmployerDiscretionaryContribution
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_DefinedContributionPensionAndOtherPostretirementPlansDisclosureMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
   
Maximum [Member] | Employee Stock Ownership Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Percentage range of discretionary contribution by employer 3.00%val_DefinedContributionPlanEmployerMatchFinancialPerformance
/ us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis
= val_EmployeeStockOwnershipPlanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember