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Operating Information by Segment and Geographic Area - Narrative (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($) | Jun. 30, 2020 USD ($) | Mar. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Mar. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) project | Dec. 31, 2019 USD ($) project subcontract $ / shares | Dec. 31, 2018 USD ($) $ / shares
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Charges from write-off of pre-contract costs |  |  |  |  |  |  | $ 26,000 |  |  |  |
Charges from write-off of embedded foreign currency derivatives |  |  |  |  |  |  |  |  |  | $ 26,000 |
Charges from write-off of embedded foreign currency derivatives (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.19 |
Effect of forecast revision on estimated project cost |  |  |  |  |  | $ 59,000 |  |  |  |  |
Gain (loss) on sale of interest in joint venture (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.74
Gains related to favorable dispute resolution |  |  |  |  |  | 18,000 | 13,000 |  |  |  |
Revenue | $ 3,655,700 | $ 3,803,200 | $ 4,091,000 | $ 4,118,600 | $ 4,408,700 | $ 4,628,600 | $ 4,146,400 | $ 4,133,600 | $ 15,668,477 | $ 17,317,284 | $ 18,851,008
North America |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 9,806,400 | $ 8,439,700 | 8,982,100
Energy & Chemicals |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Recognition of reserves for expected credit losses |  |  |  |  |  |  |  |  | 60,000 |  |
Effect on segment profit |  |  |  |  |  |  |  |  |  |  | $ 40,000
Effect on segment profit (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 0.23
Number of projects | project |  |  |  |  |  |  |  |  |  | 2 |
Change in cost and schedule impacts |  |  |  |  |  |  |  |  |  | $ 87,000 | $ 133,000
Change in cost and schedule impacts (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.62 | $ 0.89
Energy & Chemicals | Forecast revisions resulting from late design changes, schedule-driven cost growth, and subcontractor negotiations | North America |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Pre-tax charges associated with forecast revisions |  |  |  |  |  |  |  |  |  | $ 260,000 |
Pre-tax charges adversely affecting earnings before taxes (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 1.85 |
Energy & Chemicals | Write-off of pre-contract costs |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Charges from write-off of pre-contract costs |  |  |  |  |  |  |  |  |  | $ 26,000 |
Charges from write-off of pre-contract costs (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 190,000 |
Energy & Chemicals | Close-out matters |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Pre-tax charges associated with forecast revisions |  |  |  |  |  |  |  |  |  | $ 31,000 |
Pre-tax charges adversely affecting earnings before taxes (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.22 |
Mining & Industrial |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gains related to favorable dispute resolution |  |  |  |  |  |  |  |  |  | $ (31,000) |
Gains related to favorable dispute resolution (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.16 |
Infrastructure & Power |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of projects | project |  |  |  |  |  |  |  |  |  | 3 |
Infrastructure & Power | Settlement of client disputes as well as cost growth related to close-out matters |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  |  |  |  |  | $ 135,000 |
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.96 |
Gain (loss) on sale of interest in joint venture |  |  |  |  |  |  |  |  |  |  | $ 125,000
Infrastructure & Power | Late engineering changes |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  |  |  |  |  | $ 133,000 |
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.95 |
Infrastructure & Power | Estimated cost growth |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  |  |  |  |  |  | $ 188,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  | $ 1.02
Government | South Carolina and Georgia |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of subcontracts cancelled | subcontract |  |  |  |  |  |  |  |  |  | 2 |
Derecognition of accounts receivable |  |  |  |  |  |  |  |  |  | $ 68,000 |
Derecognition of revenue |  |  |  |  |  |  |  |  |  | 89,000 |
Diversified Services |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 270,000 | 322,000 | $ 332,000
Other | Warren project |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  |  |  |  |  | $ 59,000 |
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.42 |
Other | Radford project |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Effect of forecast revision on estimated project cost |  |  |  |  |  |  |  |  | $ 0 | $ 83,000 | $ 56,000
Effect of forecast revision on estimated project cost (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  | $ 0.59 | $ 0.30
Pending litigation | Energy & Chemicals | Unapproved change orders |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of projects | project |  |  |  |  |  |  |  |  | 2 |  |
Unapproved change orders for cost growth and extension of time due to client delays | 66,000 |  |  |  |  |  |  |  | $ 66,000 |  |
Estimate of possible loss | $ 121,000 |  |  |  |  |  |  |  | $ 121,000 |  |
Customer concentration | Consolidated revenue | Government |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk (as a percentage) |  |  |  |  |  |  |  |  | 18.00% | 15.00% | 18.00%
Customer concentration | Single customer | Consolidated revenue | Energy & Chemicals |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Concentration risk (as a percentage) |  |  |  |  |  |  |  |  | 12.00% | 11.00% | 18.00%
NuScale | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Research and development activities |  |  |  |  |  |  |  |  | $ 84,000 | $ 66,000 | $ 74,000
Corporate general and administrative expense |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Foreign currency exchange gains (losses) |  |  |  |  |  |  |  |  | 47,000 | 27,000 | (33,000)
DOE | NuScale | Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net of qualified reimbursable expenses |  |  |  |  |  |  |  |  | $ 71,000 | $ 56,000 | $ 62,000

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