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Accounting Policies Lease Obligations (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Jan. 01, 2011
Jan. 03, 2015
Accounting Policies Textual [Line Items]    
Operating Lease Asset, Fair Value Adjustment $ 0.8side_OperatingLeaseAssetFairValueAdjustment  
Operating Lease Liability, Fair Value Adjustment 5.0side_OperatingLeaseLiabilityFairValueAdjustment  
Operating Lease Asset, Fair Value Adjustment Unamortized Balance   0.1side_OperatingLeaseAssetFairValueAdjustmentUnamortizedBalance
Operating Lease Liabilities, Fair Value Adjustment Unamortized Balance   $ 2.4side_OperatingLeaseLiabilitiesFairValueAdjustmentUnamortizedBalance