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Employee Benefits and Private Pension Plan - Changes in provision for post-employment benefits (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Employee benefits and private pension plan    
Provision for post-employment benefits, opening R$ 284,724 R$ 272,867
Expense for the year of continuing operations 15,585 11,622
Expense (revenue) for the year of discontinued operations 2,951 (6,411)
(Gain) Losses from changes in actuarial assumptions (58,954) 24,822
Benefits paid directly by Company and its subsidiaries (18,400) (18,969)
Exchange rates from post employment benefits 217 793
Reclassification to liabilities held for sale [1] (10,404)
Provision for post-employment benefits, ending R$ 215,719 R$ 284,724
[1] For further information see Note 3.c.1.