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SEGMENT AND GEOGRAPHIC INFORMATION - Reportable segments (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Disclosure of operating segments [line items] |  |
Sales | $ 43,978 | $ 35,536
Operating income (loss) | 8,927 | 7,073
Depreciation and amortization | 1,316 | 1,221
Capital expenditures | 1,184 | 1,188
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | 8,927 | 7,073
Income from investments in associates, joint ventures and other investments | 1,137 | 1,043
Financing costs - net | (427) | (594)
Income before taxes | 9,637 | 7,522
Income tax expense | (1,381) | (946)
Net income (including non-controlling interests) | 8,256 | 6,576
Operating segments | NAFTA |  |
Disclosure of operating segments [line items] |  |
Sales | 7,385 | 5,755
Operating income (loss) | 1,871 | 936
Depreciation and amortization | 186 | 142
Capital expenditures | 202 | 147
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | 1,871 | 936
Operating segments | Brazil |  |
Disclosure of operating segments [line items] |  |
Sales | 6,291 | 4,861
Operating income (loss) | 1,875 | 1,742
Depreciation and amortization | 129 | 109
Capital expenditures | 213 | 139
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | 1,875 | 1,742
Operating segments | Europe |  |
Disclosure of operating segments [line items] |  |
Sales | 26,377 | 19,990
Operating income (loss) | 4,144 | 1,861
Depreciation and amortization | 652 | 615
Capital expenditures | 398 | 578
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | 4,144 | 1,861
Operating segments | ACIS |  |
Disclosure of operating segments [line items] |  |
Sales | 3,189 | 4,170
Operating income (loss) | 323 | 1,458
Depreciation and amortization | 211 | 220
Capital expenditures | 197 | 214
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | 323 | 1,458
Operating segments | Mining |  |
Disclosure of operating segments [line items] |  |
Sales | 727 | 751
Operating income (loss) | 974 | 1,287
Depreciation and amortization | 120 | 115
Capital expenditures | 162 | 97
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | 974 | 1,287
Operating segments | Others |  |
Disclosure of operating segments [line items] |  |
Sales | 9 | 9
Operating income (loss) | (136) | (126)
Depreciation and amortization | 18 | 20
Capital expenditures | 12 | 16
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | (136) | (126)
Intersegment sales |  |
Disclosure of operating segments [line items] |  |
Sales | (2,804) | (3,047)
Operating income (loss) | (124) | (85)
Depreciation and amortization | 0 | 0
Capital expenditures | 0 | (3)
Reconciliation from operating income to net income [Abstract] |  |
Operating income (loss) | (124) | (85)
Intersegment sales | NAFTA |  |
Disclosure of operating segments [line items] |  |
Sales | 28 | 23
Intersegment sales | Brazil |  |
Disclosure of operating segments [line items] |  |
Sales | 1,061 | 937
Intersegment sales | Europe |  |
Disclosure of operating segments [line items] |  |
Sales | 115 | 37
Intersegment sales | ACIS |  |
Disclosure of operating segments [line items] |  |
Sales | 381 | 726
Intersegment sales | Mining |  |
Disclosure of operating segments [line items] |  |
Sales | 1,211 | 1,317
Intersegment sales | Others |  |
Disclosure of operating segments [line items] |  |
Sales | $ 8 | $ 7

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