Postretirement and Other Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Feb. 28, 2025	Feb. 29, 2024	Feb. 28, 2025	Feb. 29, 2024
Retirement Benefits [Abstract]
Service cost	$ 5	$ 5	$ 11	$ 10
Interest cost	2	3	5	6
Expected long-term return on plan assets	(4)	(5)	(9)	(9)
Recognized actuarial gain	0	(1)	0	(3)
Amortization of actuarial gain	(1)	(1)	(1)	(2)
Amortization of prior service cost	2	1	3	2
Net periodic benefit cost	$ 4	$ 2	$ 9	$ 4
Percentage of gain (loss) corridor	10.00%		10.00%