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Goodwill and Other Intangible Assets - Summary of Weighted Average Amortization Period for Amortizable Intangible Assets (Detail)
12 Months Ended
Jan. 02, 2016
Non-compete agreements [Member]  
Finite Lived Intangible Assets [Line Items]  
Weighted Average Useful Life 5 years
Favorable leases [Member]  
Finite Lived Intangible Assets [Line Items]  
Weighted Average Useful Life 15 years 8 months 12 days
Pharmacy customer prescription lists [Member]  
Finite Lived Intangible Assets [Line Items]  
Weighted Average Useful Life 7 years 4 months 24 days
Customer relationships [Member]  
Finite Lived Intangible Assets [Line Items]  
Weighted Average Useful Life 20 years
Trade Name [Member]  
Finite Lived Intangible Assets [Line Items]  
Weighted Average Useful Life 7 years
Franchise fees and other [Member]  
Finite Lived Intangible Assets [Line Items]  
Weighted Average Useful Life 8 years 6 months