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Statements of Changes in Equity - BRL (R$) R$ in Thousands | Capital stock [member] | Legal reserve [member] | Investment reserve [member] | Additional dividend proposed [member] | Retained earnings [member] | Other comprehensive loss [member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2017 | R$ 10,000,000 | R$ 1,058,275 | R$ 6,939,296 | R$ 53,539 | R$ 0 | R$ (538,101) | R$ 17,513,009
Net income for the year |  |  |  |  | 2,835,068 |  | 2,835,068
Actuarial gains (losses) |  |  |  |  |  | (10,994) | (10,994)
Total comprehensive income for the year |  |  |  |  | 2,835,068 | (10,994) | 2,824,074
Legal reserve |  | 141,755 |  |  | (141,755) |  | 0
Investments reserve capitalized | 5,000,000 |  | (5,000,000) |  |  |  | 0
Interest on capital (R$0.9851 per share) |  |  |  |  | (673,328) |  | (673,328)
2017 additional proposed dividends, approved (R$0.07833 per share) |  |  |  | (53,539) |  |  | (53,539)
Additional proposed dividends |  |  |  | 118,859 | (118,859) |  | 0
Withholding income tax on interest on capital attributable as minimum mandatory dividends |  |  |  | (58,528) |  |  | (58,528)
Transfer to investments reserve |  |  | 1,901,126 |  | (1,901,126) |  |
Ending balance at Dec. 31, 2018 | 15,000,000 | 1,200,030 | 3,840,422 | 60,331 | 0 | (549,095) | 19,551,688
Net income for the year |  |  |  |  | 3,367,517 |  | 3,367,517
Actuarial gains (losses) |  |  |  |  |  | (363,076) | (363,076)
Total comprehensive income for the year |  |  |  |  | 3,367,517 | (363,076) | 3,004,441
Legal reserve |  | 168,376 |  |  | (168,376) |  | 0
Interest on capital (R$1.17012 per share) |  |  |  |  | (799,785) |  | (799,785)
2018 additional proposed dividends, approved (R$0.08827 per share) |  |  |  | (60,331) |  |  | (60,331)
Additional proposed dividends |  |  |  | 141,203 | (141,203) |  | 0
Withholding income tax on interest on capital attributable as minimum mandatory dividends |  |  |  | (60,230) |  |  | (60,230)
Transfer to investments reserve |  |  | 2,258,153 |  | (2,258,153) |  | 0
Ending balance at Dec. 31, 2019 | 15,000,000 | 1,368,406 | 6,098,575 | 80,973 | 0 | (912,171) | 21,635,783
Net income for the year |  |  |  |  | 973,318 |  | 973,318
Actuarial gains (losses) |  |  |  |  |  | 511,169 | 511,169
Total comprehensive income for the year |  |  |  |  | 973,318 | 511,169 | 1,484,487
Legal reserve |  | 48,666 |  |  | (48,666) |  |
Interest on shareholder's equity (R$0.33820 per share) |  |  |  |  | (231,163) |  | (231,163)
2019 additional proposed dividends, approved (R$0.11847 per share) |  |  |  | (80,973) |  |  | (80,973)
Additional proposed dividends |  |  |  | 40,806 | (40,806) |  | 0
Withholding income tax on interest on capital attributable as minimum mandatory dividends |  |  |  | (14,430) |  |  | (14,430)
Transfer to investments reserve |  |  | 652,683 |  | (652,683) |  | 0
Ending balance at Dec. 31, 2020 | R$ 15,000,000 | R$ 1,417,072 | R$ 6,751,258 | R$ 26,376 | R$ 0 | R$ (401,002) | R$ 22,793,704

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