v3.26.1
Financial and capital risk management (Tables)
6 Months Ended
Jun. 30, 2026
Notes and other explanatory information [abstract]  
Schedule of derivatives effects on statement of financial position
       
  June 30, 2026 December 31, 2025
  Assets Liabilities Assets Liabilities
Foreign exchange and interest rate risk 918 181 588 133
Commodities price risk 117 137 29 13
Embedded derivatives 2
Total 1,035 320 617 146
Schedule of net exposure
   
  June 30, 2026 December 31, 2025
Foreign exchange and interest rate risk (i) 737 455
Commodities price risk (20) 16
Embedded derivatives (2)
Total 715 471

(i) Includes a positive balance of US$367 and US$181 as of June 30, 2026 and December 31, 2025, respectively, related to transactions to mitigate foreign exchange and interest rate fluctuations on loans, borrowings and provisions related to Brumadinho and Samarco.

Schedule of effects of derivatives on income
       
  Gain (loss) recognized in the income statement
  Three-month period ended June 30, Six-month period ended June 30,
  2026 2025 2026 2025
Foreign exchange and interest rate risk 192 557 554 1,321
Commodities price risk (254) (9) 111 (9)
Embedded derivatives (2) 1
Total (62) 548 663 1,313
Schedule of effects of derivatives on cash flows
   
  Financial settlement inflows (outflows)
Six-month period ended June  30, 2026 2025
Foreign exchange and interest rate risk 306 297
Commodities price risk 147 (14)
Total 453 283
Schedule of foreign exchange and interest rates volatility
             
  Notional Fair value Fair value by year
Flow June 30, 2026 December 31, 2025 June 30, 2026 December 31, 2025 2027 2028 2029+
Foreign Exchange and Interest Rate Derivatives US$ 12,578 US$ 9,201 737 455 271 182 284
Schedule of sensitivity analysis financial instruments
     
Instrument's main risk events Fair value Scenario I  (∆ of 25%) Scenario II (∆ of 50%)
R$ depreciation 737 (1,005) (2,834)
US$ interest rate inside Brazil decrease 737 522 276
Brazilian interest rate increase 737 46 (520)
TJLP interest rate decrease 737 738 738
IPCA index decrease 737 550 377
SOFR interest rate decrease 737 716 693
Schedule of protection program for product price
             
  Notional Fair value Fair value by year
Flow June 30, 2026 December 31, 2025 June 30, 2026 December 31, 2025 2027 2028 2029+
Brent crude oil (bbl)              
Options 28,959,063 22,224,999 (43) (5) 50 (93)
               
Bunker (tons)              
Bunker fowards 480 (11) (11)
               
Forward Freight Agreement (days)              
Freight forwards 4,020 2,070 16 15 12 3 1
               
Fixed price Nickel sales protection (ton)              
Nickel forwards 28,398 3,557 18 5 18
Schedule of derivative financial instruments
       
Instrument Instrument's main risk events Fair value Scenario I  (∆ of 25%) Scenario II (∆ of 50%)
Brent crude oil (bbl) Decrease in fuel oil price (54) (464) (938)
Forward Freight Agreement (days) Decrease in freight price 16 (11) (39)
Hedge for fixed-price nickel sales (tons) Decrease in nickel price 18 (18) (83)
Schedule of embedded derivatives
             
  Notional Fair value Fair value by year
Flow June 30, 2026 December 31, 2025 June 30, 2026 December 31, 2025 2027 2028 2029+
Embedded derivative (pellet price) in natural gas purchase agreement (volume/month)              
Call options 746,667 746,667 (2) (2)
Schedule of sensitivity analysis of other derivatives financial instruments
       
Instrument Instrument's main risk events Fair value Scenario I  (∆ of 25%) Scenario II (∆ of 50%)
Embedded derivative (pellet price) in natural gas purchase agreement (volume/month)        
Embedded derivatives - Gas purchase Pellet price increase (2) (5) (12)
Schedule of effects of derivatives on other comprehensive income
       
  Gain recognized in the other comprehensive income
  Three-month period ended June 30, Six-month period ended June 30,
  2026 2025 2026 2025
Net investment hedge 33 115 169 286
Schedule of ratings published by Moody's regarding the main financial institutions
       
  June 30, 2026 December 31, 2025
  Cash and cash equivalents and investment Derivatives Cash and cash equivalents and investment Derivatives
Aa2 507 7 721 1
Aa3 32
A1 2,139 307 2,918 169
A2 1 17 1
A3 887 104 1,339 61
Baa1
Baa2 13 2
Baa3 28 55
Ba1 (i) 1,383 295 1,658 198
Ba2 (i) 775 305 872 188
  5,765 1,035 7,566 617

(i) A substantial part of the balances is held with financial institutions in Brazil which are deemed investment grade in local currency.