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Long-Term Debt (Schedule Of Redemption Prices Of Senior Notes) (Details)	6 Months Ended
	Mar. 28, 2015
Long-Term Debt [Abstract]
2018	102.875%imkta_SeniorNotesMaturitiesRepaymentsOfPrincipalInRollingYearOnePercent
2019	101.917%imkta_SeniorNotesMaturitiesRepaymentsOfPrincipalInRollingYearTwoPercent
2020	100.958%imkta_SeniorNotesMaturitiesRepaymentsOfPrincipalInRollingYearThreePercent
2021 and thereafter	100.00%imkta_SeniorNotesMaturitiesRepaymentsOfPrincipalInRollingYearThereafterPercent

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- Definition

Senior Notes Maturities Repayments Of Principal In Rolling Year One Percent

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- Definition

Senior Notes Maturities Repayments Of Principal In Rolling Year Thereafter, Percent

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- Definition

Senior Notes Maturities Repayments Of Principal In Rolling Year Three, Percent

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- Definition

Senior notes maturities repayments of principal in rolling year two percent.

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