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Summary of Significant Accounting Policies - Description of Business (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 24, 2015
segment
Jun. 23, 2015
segment
Mar. 04, 2017
USD ($)
store
Nov. 26, 2016
USD ($)
Aug. 27, 2016
USD ($)
May 28, 2016
USD ($)
Feb. 27, 2016
USD ($)
Nov. 28, 2015
USD ($)
Aug. 29, 2015
USD ($)
May 30, 2015
USD ($)
Mar. 04, 2017
USD ($)
segment
store
Feb. 27, 2016
USD ($)
Feb. 28, 2015
USD ($)
Description of Business                          
Ownership interest (as a percent)     100.00%               100.00%    
Number of reportable segments | segment 2 1                 2    
Numbers of stores in operation | store     4,536               4,536    
Revenues     $ 8,541,360 $ 8,089,726 $ 8,029,806 $ 8,184,181 $ 8,270,136 $ 8,154,184 $ 7,664,776 $ 6,647,561 $ 32,845,073 $ 30,736,657 $ 26,528,377
Intersegment elimination                          
Description of Business                          
Revenues                     (365,480) (232,787)  
Retail Pharmacy                          
Description of Business                          
Pharmacy sales                     18,187,451 18,442,557 18,114,768
Front end sales                     8,427,256 8,238,450 8,232,256
Other revenue                     201,962 184,924 181,353
Revenues                     26,816,669 26,865,931 $ 26,528,377
Pharmacy Services                          
Description of Business                          
Revenues                     $ 6,393,884 $ 4,103,513