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Schedule of depreciation, amortization and depletion (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
IfrsStatementLineItems [Line Items] |  |  |  |
Production costs |  | R$ 25,837,475 | R$ 19,124,901 | R$ 17,263,264
Sales expenses |  | 2,372,298 | 2,004,417 | 2,342,805
General and Administrative Expenses |  | 587,148 | 504,458 | 511,065
Other income and expenses |  | (1,534,602) | (5,224,682) | (4,631,236)
Net |  | 1,716,032 | 3,270,056 | 2,406,851
Depreciation Amortization And Depletion [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Production costs | [1] | (2,075,488) | (2,374,046) | (1,385,306)
Sales expenses |  | (11,227) | (13,978) | (11,539)
General and Administrative Expenses |  | (27,966) | (33,434) | (24,859)
Total |  | (2,114,681) | (2,421,458) | (1,421,704)
Other income and expenses | [2] | (97,725) | (95,270) | (97,627)
Net |  | R$ (2,212,406) | R$ (2,516,728) | R$ (1,519,331)
[1] | (i) The Company’s iron ore extraction in 2020 started using dry waste filtering and stacking in 100% of its production process. As a normal consequence of the operation, the use of dams has become obsolete, and consequently, the assets of dams reached the end of their useful lives on December 31, 2020. As a result of the technical and functional obsolescence of the dams, the book balance of these assets in their entirety, (R$515,491), was fully depreciated in 2020 and appropriated to the cost of production.
[2] | They mainly refer to the depreciation of investment properties, paralyzed equipment and amortization of the SWT Client Portfolio, see note 28.

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