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, 2025	Aug. 31, 2024	Aug. 31, 2023
Change in PBO
Beginning PBO	$ 513	$ 461
Service cost	23	21	$ 18
Interest cost	11	12	12
Actuarial loss	5	32
Settlements paid from plan assets	(47)	(43)
Total benefits paid	(10)	(10)
Plan participants’ contributions	13	13
Plan amendments	0	11
Effect of conversion to U.S. dollars	29	16
Ending PBO	537	513	461
Change in plan assets
Beginning fair value of plan assets	524	486
Actual return on plan assets	21	41
Settlements paid from plan assets	(47)	(43)
Employer contributions	16	17
Benefits paid from plan assets	(8)	(10)
Plan participants’ contributions	13	13
Effect of conversion to U.S. dollars	29	20
Ending fair value of plan assets	548	524	$ 486
Funded status	11	11
Amounts recognized in the Consolidated Balance Sheets
Accrued benefit liability, current	2	2
Accrued benefit asset, noncurrent	13	13
Accumulated other comprehensive loss
Actuarial gain, before tax	(47)	(54)
Prior service cost, before tax	18	$ 23
Net actuarial gain expected to be amortized to net period benefit cost in next fiscal year	1
Prior service cost expected to be amortized to net periodic benefit cost in next fiscal year	$ 6