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Available-for-Sale Investments (Tables)
6 Months Ended
Feb. 28, 2015
Available-for-Sale Investments [Abstract]  
Summary of cost and fair value of available-for-sale securities
A summary of the cost and fair value of available-for-sale securities, with gross unrealized gains and losses, is as follows (in millions):

  February 28, 2015 
     
Cost
  
Unrealized gains
  
Foreign Exchange losses
  
Unrealized losses
  
Fair value
 
AmerisourceBergen common stock
 
$
717
  
$
461
  
$
-
  
$
-
  
$
1,178
 
Other investments
  
75
   
6
   
(4
)
  
-
   
77
 
Total available-for-sale investments
 
$
792
  
$
467
  
$
(4
)
 
$
-
  
$
1,255
 

  August 31, 2014 
     
Cost
  
Unrealized gains
  
Foreign Exchange losses
  
Unrealized losses
  
Fair value
 
AmerisourceBergen common stock
 
$
717
  
$
170
  
$
-
  
$
-
  
$
887
 
Total available-for-sale investments
 
$
717
  
$
170
  
$
-
  
$
-
  
$
887