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GOODWILL AND INTANGIBLE ASSETS AND LIABILITIES (Tables) | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill | The following is a summary of Goodwill by segment:
(In millions) | September 30, 2025 |  | December 31, 2024
Steelmaking | $ | 1,747 |  |  | $ | 1,719 |
Other Businesses | 49 |  |  | 49 |
Total | $ | 1,796 |  |  | $ | 1,768 |
The increase of $28 million in the balance of Goodwill in our Steelmaking segment as of September 30, 2025, compared to December 31, 2024, is primarily due to fluctuation in foreign currency exchange rates. Additionally, to a lesser extent, the change is attributable to an increase in estimated identified goodwill as a result of measurement period adjustments to the preliminary purchase price allocation for the Stelco Acquisition. 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:
| September 30, 2025 |  | December 31, 2024
(In millions) | Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Intangible assets 1: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 1,045 |  |  | $ | (86) |  |  | $ | 959 |  |  | $ | 1,015 |  |  | $ | (34) |  |  | $ | 981 |
Developed technology | 60 |  |  | (20) |  |  | 40 |  |  | 60 |  |  | (17) |  |  | 43 |
Trade names and trademarks | 90 |  |  | (12) |  |  | 78 |  |  | 87 |  |  | (8) |  |  | 79 |
Mining permits | 72 |  |  | (30) |  |  | 42 |  |  | 72 |  |  | (29) |  |  | 43 |
Supplier relationships | 29 |  |  | (6) |  |  | 23 |  |  | 29 |  |  | (5) |  |  | 24 |
Total intangible assets | $ | 1,296 |  |  | $ | (154) |  |  | $ | 1,142 |  |  | $ | 1,263 |  |  | $ | (93) |  |  | $ | 1,170 |
Intangible liabilities 2: |  |  |  |  |  |  |  |  |  |  |
Above-market supply contracts | $ | (71) |  |  | $ | 34 |  |  | $ | (37) |  |  | $ | (71) |  |  | $ | 30 |  |  | $ | (41) |
1 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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