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Sales (Tables)
 12 Months Ended
Aug. 31, 2022
Revenue from Contract with Customer [Abstract]  
Disaggregation of revenue The following table summarizes the Company’s sales by segment and by major source (in millions):
202220212020
U.S. Retail Pharmacy
Pharmacy$80,434 $84,892 $80,481 
Retail28,643 27,113 27,220 
Total$109,078 $112,005 $107,701 
International
Pharmacy$3,727 $3,808 $3,503 
Retail6,924 6,225 5,902 
Wholesale11,178 10,472 4,876 
Total$21,830 $20,505 $14,281 
U.S. Healthcare$1,795 $— $— 
Walgreens Boots Alliance, Inc.$132,703 $132,509 $121,982