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Operating leases (Tables)
 9 Months Ended
May 31, 2018
Leases [Abstract]  
Reserve for Facility Closings and Related Lease Termination Charges
The changes in reserve for facility closings and related lease termination charges primarily in other non-current liabilities, include the following (in millions):
 
For the nine months ended May 31, 2018
 
For the twelve months ended August 31, 2017
Balance at beginning of period
$
718

 
$
466

Provision for present value of non-cancellable lease payments on closed facilities
34

 
344

Changes in assumptions
7

 
13

Accretion expense
47

 
37

Other - non cash1
30

 
—

Cash payments, net of sublease income
(159
)
 
(142
)
Balance at end of period
$
677

 
$
718



1 
Represents unfavorable lease liabilities from acquired Rite Aid stores.