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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Statement of comprehensive income [abstract]      
Net income (loss) for the year R$ (7,044,706) R$ 14,106,381 R$ 23,394,887
Other comprehensive income (loss)      
Fair value investments in equity measured at fair value through other comprehensive income [1] (362,797) (1,311) (3,441)
Tax effect on the fair value of investments (1,434) 446 1,170
Actuarial gain (loss) on post-employment plans of subsidiaries 5,430 (480) (9,499)
Tax effect of the actuarial (gain) loss (1,846) 163 3,260
Actuarial gain (loss) on post-employment plans of subsidiaries 132,344 (128,047) (3,182)
Tax effect of the actuarial loss (44,997) 43,536 1,082
Items with no subsequent effect on income (273,300) (85,693) (10,610)
Exchange rate variation on conversion of financial information of the subsidiaries abroad 163,185 4,707 (16,035)
Realization of the above items   471 (235,737)
Items with no subsequent effect on income 163,185 5,178 (251,772)
Total comprehensive income (loss) (7,154,821) 14,025,866 23,132,505
Attributable to      
Controlling shareholders' (7,184,313) 14,004,333 23,119,235
Non-controlling interest R$ 29,492 R$ 21,533 R$ 13,270
[1]
(1) Includes the acquisition of the equity interest in Lenzing Aktiengesellschaft (note 1.2.5).