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Financial Assets and Liabilities - Summary of Cash and Cash Equivalents (Detail) - BRL (R$) R$ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Financial assets and liabilities
Cash and bank accounts	R$ 98,116	R$ 4,134,074
Savings account	2,594,723	986,379
Financial investments	13,481,291	8,522,465
Cash and cash equivalents	R$ 16,174,130	R$ 13,642,918	R$ 8,472,274	R$ 3,621,798

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The amount of cash on hand and demand deposits. [Refer: Cash on hand]

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The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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