Postretirement and Other Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 29, 2024	Feb. 28, 2023	Feb. 29, 2024	Feb. 28, 2023
Retirement Benefits [Abstract]
Service cost	$ 5	$ 4	$ 10	$ 8
Interest cost	3	3	6	6
Expected long-term return on plan assets	(5)	(3)	(9)	(8)
Recognized actuarial gain	(1)	(2)	(3)	(4)
Amortization of actuarial gains	(1)	(2)	(2)	(3)
Amortization of prior service cost	1	1	2	2
Net periodic benefit cost	$ 2	$ 1	$ 4	$ 1
Percentage of gain (loss) corridor	10.00%		10.00%