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Operating Information by Segment and Geographic Area - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Disposal Group, Not Discontinued Operations | Stork |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Proceeds from sale | $ 67 |  |  |  |  |
Gain on sale |  |  |  |  | $ 11 |
Disposal Group, Not Discontinued Operations | AMECO |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Loss on sale |  | $ 60 |  |  |  |
AMECO divestiture, negative impact on earnings from foreign currency translation |  | $ 35 |  |  |  |
Energy Solutions |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  | $ 57 |
Effect of forecast revision on estimated project cost (in dollars per share) |  |  |  |  | $ 0.23 |
Expense from embedded foreign currency derivatives |  |  | $ 20 | $ 24 | $ 47 | $ (23)
Energy Solutions | Upstream Project |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  | $ 58
Effect of forecast revision on estimated project cost (in dollars per share) |  |  |  |  |  | $ 0.34
Urban Solutions | LAX Automated People Mover Project |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  | $ 59
Effect of forecast revision on estimated project cost (in dollars per share) |  |  |  |  |  | $ 0.34
Mission Solutions | Weapons Facility Project |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  | $ 30
Effect of forecast revision on estimated project cost (in dollars per share) |  |  |  |  |  | $ 0.17

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- Definition Amount of foreign currency translation gain (loss) in the disposal group, including discontinued operation, recognized in the statement of income as a result of the sale or complete or substantially complete liquidation of an investment in a foreign entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 + Details
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- Definition The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(13)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1 + Details
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