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Basis of preparation of financial statements - IAS 21 - Effects of changes in exchange rates and conversion of financial statements (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of subsidiaries [line items]        
Capital reduction in foreign subsidiary approved   $ 3,000    
Gain (Loss) arising from the accumulated exchange differences reclassified from the stockholders' equity to the income statement $ 1,132 2,413    
Investment in subsidiary   1,751 $ 2,031 $ 2,798
Vale International S.A.        
Disclosure of subsidiaries [line items]        
Capital reduction in foreign subsidiary approved   3,000    
Gain (Loss) arising from the accumulated exchange differences reclassified from the stockholders' equity to the income statement   2,413    
Investment in subsidiary   $ 6,243