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Goodwill and Intangible Assets, Net - Summary of Consolidated Goodwill, Intangible Assets and Deferred Charges (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | $ 10,252 | $ 11,590
Goodwill [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 8,506 | 9,562
Extraction rights [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 1,358 | 1,590
Industrial property and trademarks [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 24 | 24
Mining projects [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 43 | 43
Others intangible assets [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 321 | 371
Cost [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 11,603 | 12,847
Cost [member] | Goodwill [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 8,506 | 9,562
Cost [member] | Extraction rights [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 1,774 | 1,985
Cost [member] | Industrial property and trademarks [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 44 | 42
Cost [member] | Customer relationships [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 196 | 196
Cost [member] | Mining projects [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 49 | 48
Cost [member] | Others intangible assets [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | 1,034 | 1,014
Accumulated Depreciation, amortization and Impairment [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | (1,351) | (1,257)
Accumulated Depreciation, amortization and Impairment [member] | Extraction rights [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | (416) | (395)
Accumulated Depreciation, amortization and Impairment [member] | Industrial property and trademarks [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | (20) | (18)
Accumulated Depreciation, amortization and Impairment [member] | Customer relationships [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | (196) | (196)
Accumulated Depreciation, amortization and Impairment [member] | Mining projects [member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | (6) | (5)
Accumulated Depreciation, amortization and Impairment [member] | Others intangible assets [Member] |  |
Disclosure of reconciliation of changes in intangible assets and goodwill [line items] |  |
Intangible assets and goodwill | $ (713) | $ (643)

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