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Equity method investments (Tables)
 3 Months Ended
Nov. 30, 2017
Equity Method Investments and Joint Ventures [Abstract]  
Equity Method Investments
Equity method investments as of November 30, 2017 and August 31, 2017, were as follows (in millions, except percentages):
 
November 30, 2017
 
August 31, 2017
 
Carrying
value
 
Ownership
percentage
 
Carrying
value
 
Ownership
percentage
AmerisourceBergen
$
4,895

 
26%
 
$
5,024

 
26%
Others
1,133

 
8% - 50%
 
1,296

 
8% - 50%
Total
$
6,028

 
 
 
$
6,320