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GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES (Tables) | 9 Months Ended
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Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following is a summary of Goodwill by segment:
| (In Millions)
| September 30, 2021 |  | December 31, 2020
Steelmaking | $ | 898 |  |  | $ | 1,232 |
Other Businesses | 174 |  |  | 174 |
Total goodwill | $ | 1,072 |  |  | $ | 1,406 |
The decrease of $334 million in the balance of Goodwill in our Steelmaking segment as of September 30, 2021, compared to December 31, 2020, is due to the change in estimated identified goodwill as a result of measurement period adjustments to the preliminary purchase price allocation for the acquisition of ArcelorMittal USA. Refer to NOTE 3 - ACQUISITIONS for further details.
Schedule of Intangible Assets and Goodwill | The following is a summary of our intangible assets and liabilities:
| (In Millions)
| September 30, 2021 |  | December 31, 2020
| Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Intangible assets 1: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 77 |  |  | $ | (7) |  |  | $ | 70 |  |  | $ | 77 |  |  | $ | (3) |  |  | $ | 74 |
Developed technology | 60 |  |  | (6) |  |  | 54 |  |  | 60 |  |  | (3) |  |  | 57 |
Trade names and trademarks | 11 |  |  | (2) |  |  | 9 |  |  | 11 |  |  | (1) |  |  | 10 |
Mining permits | 72 |  |  | (25) |  |  | 47 |  |  | 72 |  |  | (25) |  |  | 47 |
Total intangible assets | $ | 220 |  |  | $ | (40) |  |  | $ | 180 |  |  | $ | 220 |  |  | $ | (32) |  |  | $ | 188 |
Intangible liabilities 2: |  |  |  |  |  |  |  |  |  |  |
Above-market supply contracts | $ | (71) |  |  | $ | 12 |  |  | $ | (59) |  |  | $ | (71) |  |  | $ | 7 |  |  | $ | (64) |
1 Intangible assets are classified as Other non-current assets. Amortization related to mining permits is recognized in Cost of goods sold. Amortization of all other intangible assets is recognized in Selling, general and administrative expenses.
2 Intangible liabilities are classified as Other non-current liabilities. Amortization of all intangible liabilities is recognized in Cost of goods sold.

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