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Restructuring (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
May 31, 2014
May 31, 2014
Employees
Operational Excellence Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Expected restructuring costs $ 4.7us-gaap_RestructuringAndRelatedCostExpectedCost1
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
4.7us-gaap_RestructuringAndRelatedCostExpectedCost1
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
Restructuring costs incurred to date 1.4us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
1.4us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
Accelerated depreciation due to restructuring 0.7us-gaap_RestructuringReserveAcceleratedDepreciation
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
 
Severance [Member] | Operational Excellence Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs incurred to date 0.6us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
0.6us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
Other Costs [Member] | Operational Excellence Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Restructuring costs incurred to date 0.1us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_OtherRestructuringMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
0.1us-gaap_RestructuringAndRelatedCostCostIncurredToDate1
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_OtherRestructuringMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
Minimum [Member]    
Restructuring Cost and Reserve [Line Items]    
Expected number of positions eliminated   80,000us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Minimum [Member] | Operational Excellence Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Expected future saving   15us-gaap_EffectOnFutureEarningsAmount
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
Maximum [Member]    
Restructuring Cost and Reserve [Line Items]    
Expected number of positions eliminated   100,000us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Maximum [Member] | Operational Excellence Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Expected future saving   18us-gaap_EffectOnFutureEarningsAmount
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
Facility Improvements [Member] | Operational Excellence Program [Member]    
Restructuring Cost and Reserve [Line Items]    
Expected restructuring costs $ 5.4us-gaap_RestructuringAndRelatedCostExpectedCost1
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingImprovementsMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember
5.4us-gaap_RestructuringAndRelatedCostExpectedCost1
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_BuildingImprovementsMember
/ us-gaap_RestructuringPlanAxis
= ango_OperationalExcellenceProgramMember