Postretirement and Other Employee Benefits - Schedule of Benefit Obligations and Plan Assets, Changes in Benefit Obligation and Plan Assets and Funded Status of Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 31, 2024	Aug. 31, 2023	Aug. 31, 2022
Change in PBO
Beginning PBO	$ 461	$ 432
Service cost	21	18	$ 25
Interest cost	12	12	4
Actuarial loss (gain)	32	(23)
Settlements paid from plan assets	(43)	(27)
Total benefits paid	(10)	(16)
Plan participants’ contributions	13	22
Plan amendments	11	0
Effect of conversion to U.S. dollars	16	43
Ending PBO	513	461	432
Change in plan assets
Beginning fair value of plan assets	486	459
Actual return on plan assets	41	(16)
Settlements paid from plan assets	(43)	(27)
Employer contributions	17	18
Benefits paid from plan assets	(10)	(15)
Plan participants’ contributions	13	22
Effect of conversion to U.S. dollars	20	45
Ending fair value of plan assets	524	486	$ 459
Funded status	11	25
Amounts recognized in the Consolidated Balance Sheets
Accrued benefit liability, current	2	1
Accrued benefit asset, noncurrent	13	26
Accumulated other comprehensive loss
Actuarial gain, before tax	(54)	(71)
Prior service cost, before tax	23	$ 16
Net actuarial gain expected to be amortized to net period benefit cost in next fiscal year	2
Prior service cost expected to be amortized to net periodic benefit cost in next fiscal year	$ 5