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Equity method investments (Tables)
 9 Months Ended
May 31, 2020
Equity Method Investments and Joint Ventures [Abstract]  
Equity Method Investments
Equity method investments as of May 31, 2020 and August 31, 2019, were as follows (in millions, except percentages):
 May 31, 2020August 31, 2019
 Carrying valueOwnership percentageCarrying valueOwnership percentage
AmerisourceBergen$5,412  28%$5,211  27%
Others1,621  
8% - 50%
1,640  
8% - 50%
Total$7,033   $6,851