Derivatives and Other Financial Instruments - Schedule of Outstanding Quantities of Derivative Instruments (Detail) - Level 1 [Member] kt in Thousands, € in Millions, kr in Millions, R$ in Millions, $ in Millions	Sep. 30, 2023 EUR (€) kt	Sep. 30, 2023 NOK (kr) kt	Sep. 30, 2023 BRL (R$) kt	Sep. 30, 2023 CAD ($) kt	Sep. 30, 2022 EUR (€) kt	Sep. 30, 2022 NOK (kr) kt	Sep. 30, 2022 BRL (R$) kt
Foreign Exchange Buy Forwards
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Liabilities	€ 68	kr 185	R$ 734		€ 67	kr 87	R$ 1,216
Foreign Exchange Sell Forwards
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Liabilities	€ 18			$ 33			R$ 17
Commodity Sell Forwards
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Outstanding quantities of derivative instruments	144	144	144	144	398	398	398
Commodity Buy Forwards
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Outstanding quantities of derivative instruments	126	126	126	126	178	178	178