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Schedule II Nov Inc. Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2025
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule II Nov Inc. Valuation and Qualifying Accounts | SCHEDU LE II NOV INC. VALUATION AND QUALIFYING ACCOUNTS Years Ended December 31, 2025, 2024 and 2023 (in millions)
|  | Balance beginning of year |  |  | Additions (Deductions) charged to costs and expenses |  |  | Charge offs and other |  |  | Balance end of year |
Reserve for excess and obsolete inventories: |  |  |  |  |  |  |  |  |  |  |  |
2025 |  | $ | 286 |  |  | $ | 36 |  |  | $ | (61 | ) |  | $ | 261 |
2024 |  |  | 354 |  |  |  | 31 |  |  |  | (99 | ) |  |  | 286 |
2023 |  |  | 378 |  |  |  | 28 |  |  |  | (52 | ) |  |  | 354 |
Valuation allowance for deferred tax assets: |  |  |  |  |  |  |  |  |  |  |  |
2025 |  | $ | 266 |  |  | $ | 82 |  |  | $ | 4 |  |  | $ | 352 |
2024 |  |  | 346 |  |  |  | (64 | ) |  |  | (16 | ) |  |  | 266 |
2023 |  |  | 920 |  |  |  | (564 | ) |  |  | (10 | ) |  |  | 346 |

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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