Restructuring, Severance and Related Charges (Liability Activity) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring related charges	$ 10	$ 157	$ 26
Employee Severance and Benefit Costs
Restructuring Reserve [Roll Forward]
Restructuring related charges	5	94	16
Lease Costs
Restructuring Reserve [Roll Forward]
Restructuring related charges	(1)	8	0
Asset Write-off Costs
Restructuring Reserve [Roll Forward]
Restructuring related charges	5	33	(4)
2020 Restructuring Plan
Restructuring Reserve [Roll Forward]
Balance as of beginning of period	11	6
Restructuring related charges	9	79
Asset write-off charge and other non-cash activity	(4)	(40)
Cash payments	(9)	(34)
Balance as of end of period	7	11	6
2020 Restructuring Plan | Employee Severance and Benefit Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period	8	3
Restructuring related charges	4	37
Asset write-off charge and other non-cash activity	0	(1)
Cash payments	(8)	(31)
Balance as of end of period	4	8	3
2020 Restructuring Plan | Lease Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period	2	2
Restructuring related charges	(1)	8
Asset write-off charge and other non-cash activity	1	(6)
Cash payments	0	(2)
Balance as of end of period	2	2	2
2020 Restructuring Plan | Asset Write-off Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period	0	0
Restructuring related charges	5	33
Asset write-off charge and other non-cash activity	(5)	(33)
Cash payments	0	0
Balance as of end of period	0	0	0
2020 Restructuring Plan | Other Related Costs
Restructuring Reserve [Roll Forward]
Balance as of beginning of period	1	1
Restructuring related charges	1	1
Asset write-off charge and other non-cash activity	0	0
Cash payments	(1)	(1)
Balance as of end of period	$ 1	$ 1	$ 1