Postretirement and Other Employee Benefits - Schedule of Fair Values of Plan Assets by Asset Category (Details) - USD ($) $ in Millions	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 524	$ 486	$ 459
Asset Allocation	100.00%	100.00%
Cash and Cash Equivalents | Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 12	$ 17
Asset Allocation	2.00%	3.00%
Global Equity Securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 235	$ 213
Asset Allocation	45.00%	44.00%
Corporate Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 223	$ 216
Asset Allocation	43.00%	45.00%
Government Bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 43	$ 30
Asset Allocation	8.00%	6.00%
Insurance Contracts | Level 3
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 11	$ 10
Asset Allocation	2.00%	2.00%