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CONSOLIDATED STATEMENTS OF CASH FLOWS - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities      
Net income for the year R$ 15,558,938 R$ 2,388,054 R$ 1,216,887
Adjustments to reconcile net income for the year to net cash provided by operating activities      
Depreciation and amortization 2,658,561 2,499,104 2,074,295
Impairment of assets 0 411,925 0
Equity in earnings of unconsolidated companies (563,158) (152,569) 17,050
Exchange variation, net 108,373 204,291 247,555
Gains and losses on derivative financial instruments, net (17,928) 774 15,118
Post-employment benefits 255,477 203,689 165,487
Long-term incentive plans 65,289 62,801 43,895
Income tax 4,713,630 1,107,624 457,833
(Gains) Losses on disposal of property, plant and equipment (77,417) (18,482) 2,129
Results in operations with subsidiary and joint ventures 162,913 0 0
Impairment of financial assets (357) 64,132 21,044
Provision (reversal) of tax, civil, labor and environmental liabilities, net 125,641 477,518 38,417
Tax credits recovery (1,182,082) (1,358,744) (402,499)
Interest income on short-term investments (170,671) (99,359) (72,784)
Interest expense on loans 1,059,841 1,022,460 938,120
Interest on loans with related parties (6,089) (8,277) (4,767)
(Reversal) Provision for net realisable value adjustment in inventory (2,812) (40,697) 24,665
Cash flows from operations before changes in working capital 22,688,149 6,764,244 4,782,445
Changes in assets and liabilities      
(Increase) Decrease in trade accounts receivable (1,614,047) (527,722) 656,831
(Increase) Decrease in inventories (7,704,329) (428,263) 1,556,713
Increase (Decrease) in trade accounts payable 2,534,329 1,014,800 (642,699)
Decrease in other receivables 290,658 369,076 146,825
(Decrease) Increase in other payables (317,658) 182,934 (462,906)
Dividends from joint ventures 117,438 94,937 44,037
Purchases of short-term investments (3,010,084) (3,224,158) (3,676,744)
Proceeds from maturities and sales of short-term investments 3,595,212 3,924,799 521,616
Cash provided by operating activities 16,579,668 8,170,647 2,926,118
Interest paid on loans and financing (1,100,826) (1,079,981) (945,027)
Interest paid on lease liabilities (68,789) (61,727) (83,620)
Income and social contribution taxes paid (2,893,120) (621,033) (254,679)
Net cash provided by operating activities 12,516,933 6,407,906 1,642,792
Cash flows from investing activities      
Purchases of property, plant and equipment (3,026,023) (1,650,778) (1,746,600)
Proceeds from sales of property, plant and equipment, investments and other intangibles 82,635 61,275 21,805
Additions in other intangibles (166,310) (154,250) (100,313)
Advance for future investment in joint venture 0 0 (94,687)
Capital decrease (increase) in joint venture 113,595 (42,782) 20,344
Payment for business combination 0 (442,542) 0
Net cash used by investing activities (2,996,103) (2,229,077) (1,899,451)
Cash flows from financing activities      
Dividends and interest on capital paid (5,339,426) (274,815) (484,173)
Proceeds from loans and financing 609,703 3,120,745 5,585,573
Repayment of loans and financing (5,116,621) (5,084,028) (4,885,083)
Leasing payment (275,854) (247,914) (161,824)
Intercompany loans, net 139,556 (7,777) (64,089)
Net cash used in financing activities (9,982,642) (2,493,789) (9,596)
Exchange variation on cash and cash equivalents 5,262 290,512 17,763
(Decrease) Increase in cash and cash equivalents (456,550) 1,975,552 (248,492)
Cash and cash equivalents at beginning of year 4,617,204 2,641,652 2,890,144
Cash and cash equivalents at end of year R$ 4,160,654 R$ 4,617,204 R$ 2,641,652