Significant Accounting Policies - Additional Information (Detail) - Other Income (Expense) [Member] $ in Millions	3 Months Ended
	Dec. 31, 2023 USD ($)
Significant Accounting Policies [Line Items]
Investment income	$ 12
Revaluation of Non-functional Currency [Member]
Significant Accounting Policies [Line Items]
Foreign exchange losses	(40)
Single Devaluation Action [Member]
Significant Accounting Policies [Line Items]
Foreign exchange losses	$ (33)