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Segment Information (Tables) | 9 Months Ended
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Sep. 30, 2025
Segment Reporting [Abstract] |
Schedule of Significant segment expenses | The significant expenses that are regularly provided to the CODM are disclosed in the Consolidated Statements of Net Income as a part of the consolidated net income and are as follows.
Significant segment expenses / income (Dollars in millions) |  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Total direct costs |  | $ | (1,798 | ) |  | $ | (1,744 | ) |  | $ | (5,371 | ) |  | $ | (5,322 | )
Total production overhead costs |  |  | (385 | ) |  |  | (351 | ) |  |  | (1,125 | ) |  |  | (1,075 | )
Cost of sales |  | $ | (2,184 | ) |  | $ | (2,095 | ) |  | $ | (6,496 | ) |  | $ | (6,398 | )
Research, development and engineering expenses (gross) |  | $ | (153 | ) |  | $ | (148 | ) |  | $ | (455 | ) |  | $ | (465 | )
Reimbursements from customer funded engineering projects |  |  | 36 |  |  |  | 52 |  |  |  | 136 |  |  |  | 140 |
Research, development and engineering expenses, net |  | $ | (117 | ) |  | $ | (96 | ) |  | $ | (319 | ) |  | $ | (325 | )
Schedule of Segment assets and expenditures for long-lived assets | The segment assets and expenditures for long-lived assets for the periods presented are as follows.
Segment assets and expenditures for long-lived assets (Dollars in millions) |  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Expenditures for long-lived assets |  | $ | (106 | ) |  | $ | (146 | ) |  | $ | (323 | ) |  | $ | (440 | )
Total assets |  |  | 8,463 |  |  |  | 8,306 |  |  |  | 8,463 |  |  |  | 8,306 |

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total assets from reportable segments to the entity's consolidated assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-31 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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