Property, Plant, and Equipment (Details) - USD ($) $ in Millions		May 31, 2018	Aug. 31, 2017
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment		$ 47,264	$ 41,533
Accumulated depreciation		(24,559)	(22,102)
Property, plant, and equipment, net		22,705	19,431
Land
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment		345	345
Buildings
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment		8,560	7,958
Equipment
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment	[1]	36,909	32,187
Equipment not placed into service
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment		1,410	994
Construction in progress
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment	[2]	826	499
Software
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment		$ 624	$ 544

[1] Included costs related to equipment not placed into service of $1.41 billion and $994 million, as of May 31, 2018 and August 31, 2017, respectively.

[2] Includes building-related construction and tool installation costs for assets not placed into service.