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Related parties (Tables)
12 Months Ended
Aug. 31, 2021
Related Party Transactions [Abstract]  
Schedule of related party transactions Related party transactions with AmerisourceBergen (in millions):
 202120202019
Purchases, net$62,513 $59,569 $57,429 
Trade accounts payable, net$6,589 $6,390 $6,484