Postretirement and Other Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	May 31, 2024	May 31, 2023	May 31, 2024	May 31, 2023
Retirement Benefits [Abstract]
Service cost	$ 5	$ 4	$ 15	$ 12
Interest cost	3	3	9	9
Expected long-term return on plan assets	(4)	(4)	(13)	(12)
Recognized actuarial gain	(1)	(2)	(4)	(6)
Amortization of actuarial gain	(2)	(2)	(4)	(5)
Amortization of prior service cost	1	1	3	3
Net periodic benefit cost	$ 2	$ 0	$ 6	$ 1
Percentage of gain (loss) corridor	10.00%		10.00%