Operating Leases (Details) $ in Millions	3 Months Ended		12 Months Ended
	Nov. 30, 2016 USD ($) Lease	Nov. 30, 2015 USD ($)	Aug. 31, 2016 USD ($)
Operating Leased Assets [Line Items]
Interval period of renewal options	5 years
Proceeds from sale leaseback transactions	$ 436	$ 54
Charges related to facilities that were closed or relocated	17	66
Changes in reserve for facility closings and related lease termination charges [Roll Forward]
Balance at beginning of period	466	$ 446	$ 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
Number of leases | Lease	72
Minimum [Member]
Operating Leased Assets [Line Items]
Initial term of operating lease	15 years
Maximum [Member]
Operating Leased Assets [Line Items]
Initial term of operating lease	25 years
Potential undiscounted future payments	$ 334