Postretirement and Other Employee Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 30, 2022	Nov. 30, 2021
Retirement Benefits [Abstract]
Service cost	$ 4	$ 6
Interest cost	3	1
Expected long-term return on plan assets	(5)	(4)
Recognized actuarial gain	(2)	(3)
Amortization of actuarial gains	(1)	(2)
Amortization of prior service credit	1	1
Net periodic benefit cost	$ 0	$ (1)
Percentage of gain (loss) corridor	10.00%