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Fair Value Measurements (Tables) | 6 Months Ended
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Jun. 30, 2025
Fair Value Disclosures [Abstract] |
Fair value measurements | Array has applied the provisions of fair value accounting for purposes of computing the fair value of financial instruments for disclosure purposes as displayed below.
| Level within the Fair Value Hierarchy |  | June 30, 2025 |  | December 31, 2024
|  | Book Value |  | Fair Value |  | Book Value |  | Fair Value
(Dollars in millions) |  |  |  |  |  |  |  |  |
Long-term debt | 2 |  | $ | 2,873 |  |  | $ | 2,702 |  |  | $ | 2,890 |  |  | $ | 2,785 |

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