Derivatives and Other Financial Instruments - Schedule of Outstanding Quantities of Derivative Instruments (Detail) - Level 1 [Member] kt in Thousands, € in Millions, R$ in Millions, $ in Millions	Mar. 31, 2022 EUR (€) kt	Mar. 31, 2022 BRL (R$) kt	Mar. 31, 2021 EUR (€) kt	Mar. 31, 2021 AUD ($) kt	Mar. 31, 2021 BRL (R$) kt
Commodity Contract
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Outstanding quantities of derivative instruments	481	481	21	21	21
Foreign Exchange Forward
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Outstanding quantities of derivative instruments	€ 80	R$ 1,323	€ 124	$ 94	R$ 354