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PROVISIONS (Tables)
 6 Months Ended
Jun. 30, 2021
Disclosure of other provisions [abstract]  
Disclosure of other provisions
Provisions as of June 30, 2021 and December 31, 2020 are comprised of the following:
June 30, 2021December 31, 2020
Environmental642 661 
Emission rights 425 571 
Asset retirement obligations407 397 
Site restoration250 309 
Staff related obligations126 127 
Voluntary separation plans40 55 
Litigation and contingencies (see note 12)348 269 
Tax claims80 62 
Other legal claims and contingencies268 207 
Commercial agreements and onerous contracts23 25 
Other350 218 
Total2,611 2,632 
Short-term provisions659 935 
Long-term provisions1,952 1,697 
Total2,611 2,632