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GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES (Tables) | 3 Months Ended
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Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following is a summary of Goodwill by segment:
(In millions) | March 31, 2025 |  | December 31, 2024
Steelmaking | $ | 1,718 |  |  | $ | 1,719 |
Other Businesses | 49 |  |  | 49 |
Total goodwill | $ | 1,767 |  |  | $ | 1,768 |
The decrease of $1 million in the balance of Goodwill in our Steelmaking segment as of March 31, 2025, compared to December 31, 2024, 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 Stelco. Refer to NOTE 3 - ACQUISITIONS for further details.
Schedule of Intangible Assets and Liabilities | The following is a summary of our intangible assets and liabilities:
| March 31, 2025 |  | December 31, 2024
(In millions) | Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Intangible assets 1: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 1,014 |  |  | $ | (51) |  |  | $ | 963 |  |  | $ | 1,015 |  |  | $ | (34) |  |  | $ | 981 |
Developed technology | 60 |  |  | (18) |  |  | 42 |  |  | 60 |  |  | (17) |  |  | 43 |
Trade names and trademarks | 87 |  |  | (9) |  |  | 78 |  |  | 87 |  |  | (8) |  |  | 79 |
Mining permits | 72 |  |  | (29) |  |  | 43 |  |  | 72 |  |  | (29) |  |  | 43 |
Supplier relationships | 29 |  |  | (5) |  |  | 24 |  |  | 29 |  |  | (5) |  |  | 24 |
Total intangible assets | $ | 1,262 |  |  | $ | (112) |  |  | $ | 1,150 |  |  | $ | 1,263 |  |  | $ | (93) |  |  | $ | 1,170 |
Intangible liabilities 2: |  |  |  |  |  |  |  |  |  |  |
Above-market supply contracts | $ | (71) |  |  | $ | 31 |  |  | $ | (40) |  |  | $ | (71) |  |  | $ | 30 |  |  | $ | (41) |
1 Intangible assets are classified as Other non-current assets. Amortization related to mining permits and supplier relationships 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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