Postretirement and Other Employee Benefits - Schedule of Information About Net Periodic Benefit Cost for Plans Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2025	Aug. 31, 2024	Aug. 31, 2023
Retirement Benefits [Abstract]
Service cost	$ 23	$ 21	$ 18
Interest cost	11	12	12
Expected long-term return on plan assets	(18)	(17)	(17)
Recognized actuarial gain	(6)	(7)	(7)
Amortization of actuarial gains	(2)	(3)	(7)
Amortization of prior service costs	5	5	4
Net periodic benefit cost	$ 13	$ 11	$ 3
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Gain (loss) corridor (as a percent)	10.00%	10.00%	10.00%