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Cash and cash equivalents
 12 Months Ended
Dec. 31, 2021
Cash and cash equivalents [abstract]  
Cash and cash equivalents
6.    Cash and cash equivalents
December 31, 2021December 31, 2020
Short-term bank deposits569,816 415,387 
Short-term investment1,224,546 1,224,678 
1,794,362 1,640,065 
Cash and cash equivalents are held for the purpose of meeting short-term cash needs and include cash on hand, deposits with banks and other short-term highly liquid investments with original maturities of three months or less and with immaterial risk of change in value. Short-term investments consist mainly of investments in Brazilian Treasury Bonds (“LFTs”) with an average return of 100% of the Basic Interest Rate (SELIC, 9.25% per year on December 31, 2021 and 2.0% per year on December 31, 2020)