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Operating Leases (Tables)
 3 Months Ended
Nov. 30, 2016
Operating Leases [Abstract]  
Reserve for Facility Closings and Related Lease Termination Charges
The changes in reserve for facility closings and related lease termination charges include the following (in millions):

  
For the three
months ended
November 30,
  
For the twelve
months ended
August 31,
 
  
2016
  
2016
 
Balance at beginning of period
 $
466
  
$
446
 
Provision for present value of non-cancellable lease payments on closed facilities
  
13
   
134
 
Assumptions about future sublease income, terminations and changes in interest rates
  
(1
)
  
(34
)
Interest accretion
  
5
   
27
 
Cash payments, net of sublease income
  
(27
)
  
(107
)
Balance at end of period
 $
456
  
$
466