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RESTRUCTURING AND SEVERANCE CHARGES - Additional Information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 28, 2014
Person
Employee Severance  
Restructuring Cost and Reserve [Line Items]  
Net provisions for restructuring costs $ 3.6us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Number of employees 100us-gaap_RestructuringAndRelatedCostNumberOfPositionsEliminatedInceptionToDate
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_EmployeeSeveranceMember
Contract Termination Costs  
Restructuring Cost and Reserve [Line Items]  
Net provisions for restructuring costs 1.6us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_ContractTerminationMember
Contract Termination, Operating Lease  
Restructuring Cost and Reserve [Line Items]  
Net provisions for restructuring costs 1.2us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= mscc_ContractTerminationOperatingLeaseMember
Other Associated Costs  
Restructuring Cost and Reserve [Line Items]  
Net provisions for restructuring costs $ 1.9us-gaap_RestructuringCharges
/ us-gaap_RestructuringCostAndReserveAxis
= us-gaap_OtherRestructuringMember