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Network
40903 - Disclosure - Retirement Plan (Weighted Average Assumptions Used To Determine Benefit Obligation And Benefit Cost) (Details)
(http://www.berryplastics.com/role/DisclosureRetirementPlanWeightedAverageAssumptionsUsedToDetermineBenefitObligationAndBenefitCostDetails)
TableSchedule of Defined Benefit Plans Disclosures [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0001378992 (http://www.sec.gov/CIK)
Defined Benefit Plan Disclosure [Line Items]Period [Axis]
2015-09-27 - 2016-10-01
2014-09-28 - 2015-09-26
Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]Defined Benefit Plans and Other Postretirement Benefit Plans [Axis]
Defined Benefit Pension Plans [Member]Retiree Health Plan [Member]Defined Benefit Pension Plans [Member]Retiree Health Plan [Member]
Discount rate for benefit obligation
2.70%  
2.90%  
4.00%  
3.00%  
Discount rate for net benefit cost
3.50%  
3.50%  
4.00%  
2.90%  
Expected return on plan assets for net benefit costs
5.30%  
 
7.30%