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, 2024	Aug. 31, 2023	Aug. 31, 2022
Retirement Benefits [Abstract]
Service cost	$ 21	$ 18	$ 25
Interest cost	12	12	4
Expected long-term return on plan assets	(17)	(17)	(17)
Recognized actuarial gain	(7)	(7)	(6)
Amortization of actuarial gains	(3)	(7)	(8)
Net settlement loss	0	0	1
Amortization of prior service costs	5	4	4
Net periodic benefit cost	$ 11	$ 3	$ 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%