Postretirement and Other Employee Benefits - Schedule of Fair Values of Plan Assets by Asset Category (Details) - USD ($) $ in Millions	Aug. 31, 2026	Aug. 31, 2025	Aug. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 567	$ 548	$ 524
Asset Allocation	100.00%	100.00%
Level 1 | Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 25	$ 16
Asset Allocation	4.00%	3.00%
Level 2 | Global Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 261	$ 249
Asset Allocation	47.00%	46.00%
Level 2 | Corporate Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 218	$ 232
Asset Allocation	38.00%	42.00%
Level 2 | Government Bonds
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 53	$ 40
Asset Allocation	9.00%	7.00%
Level 3 | Insurance Contracts
Defined Benefit Plan Disclosure [Line Items]
Fair Value	$ 10	$ 11
Asset Allocation	2.00%	2.00%