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Associate Retirement Plans - Collective Bargaining Agreements Associated with Significant Multi-Employer Plans (Detail)
12 Months Ended
Jan. 03, 2015
Agreement
Defined Benefit Plan Disclosure [Line Items]  
Total Collective Bargaining Agreements 4sptn_MultiemployerPlansCollectiveBargainingArrangementNumber
Percentage of Associates Represent By Union 8.00%us-gaap_MultiemployerPlansCollectiveBargainingArrangementPercentageOfParticipants
Over 5 % Contribution 2014 No
Minimum [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expiration Date Oct. 31, 2015
Maximum [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expiration Date Feb. 28, 2017