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Revenue from Contracts with Customers - Schedule of Disaggregation of Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 2,826,361 | $ 2,521,672 | $ 8,126,298 | $ 7,263,387
UNITED STATES |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | 2,708,660 | 2,392,192 | 7,762,552 | 6,877,298
United States Electrical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | 633,383 | 530,950 | 1,719,525 | 1,482,475
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | 634,327 | 531,606 | 1,723,090 | 1,484,948
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Commercial Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 339,478 | $ 275,824 | $ 908,999 | $ 776,121
Percent of individual segment |  | 54.00% | 52.00% | 53.00% | 52.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Manufacturing Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 78,562 | $ 61,618 | $ 210,331 | $ 162,186
Percent of individual segment |  | 12.00% | 12.00% | 12.00% | 11.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Healthcare Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 43,911 | $ 29,419 | $ 119,259 | $ 75,417
Percent of individual segment |  | 7.00% | 5.00% | 7.00% | 5.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Institutional Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 46,344 | $ 42,153 | $ 115,799 | $ 138,973
Percent of individual segment |  | 7.00% | 8.00% | 6.00% | 9.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Transportation Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 40,525 | $ 49,578 | $ 128,047 | $ 144,788
Percent of individual segment |  | 6.00% | 9.00% | 7.00% | 10.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Water and Wastewater Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 5,466 | $ 4,381 | $ 15,962 | $ 9,909
Percent of individual segment |  | 1.00% | 1.00% | 1.00% | 1.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Hospitality Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 4,575 | $ 2,522 | $ 9,887 | $ 11,286
Percent of individual segment |  | 1.00% | 1.00% | 1.00% | 1.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Short Duration Projects [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities | [1] | $ 58,637 | $ 54,678 | $ 167,553 | $ 137,260
Percent of individual segment |  | 9.00% | 10.00% | 10.00% | 9.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Service Work [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 16,829 | $ 11,433 | $ 47,253 | $ 29,008
Percent of individual segment |  | 3.00% | 2.00% | 3.00% | 2.00%
United States Electrical Construction And Facilities Services [Member] | UNITED STATES | Intersegment Eliminations [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ (944) | $ (656) | $ (3,565) | $ (2,473)
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | 1,117,388 | 1,004,407 | 3,184,205 | 2,887,572
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | 1,120,634 | 1,005,886 | 3,192,348 | 2,891,917
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Commercial Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 444,515 | $ 369,791 | $ 1,225,897 | $ 1,133,092
Percent of individual segment |  | 40.00% | 37.00% | 38.00% | 39.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Manufacturing Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 156,524 | $ 154,644 | $ 461,385 | $ 394,439
Percent of individual segment |  | 14.00% | 15.00% | 15.00% | 14.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Healthcare Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 120,562 | $ 123,415 | $ 367,866 | $ 357,483
Percent of individual segment |  | 11.00% | 12.00% | 12.00% | 12.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Institutional Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 104,306 | $ 74,867 | $ 267,373 | $ 215,635
Percent of individual segment |  | 9.00% | 8.00% | 8.00% | 7.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Transportation Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 15,494 | $ 23,954 | $ 47,793 | $ 63,075
Percent of individual segment |  | 1.00% | 2.00% | 1.00% | 2.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Water and Wastewater Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 66,667 | $ 53,367 | $ 196,157 | $ 141,917
Percent of individual segment |  | 6.00% | 5.00% | 6.00% | 5.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Hospitality Market Sector [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 6,513 | $ 10,806 | $ 22,892 | $ 30,593
Percent of individual segment |  | 1.00% | 1.00% | 1.00% | 1.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Short Duration Projects [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities | [1] | $ 77,261 | $ 78,218 | $ 257,571 | $ 246,812
Percent of individual segment |  | 7.00% | 8.00% | 8.00% | 9.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Operating Segments [Member] | Service Work [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 128,792 | $ 116,824 | $ 345,414 | $ 308,871
Percent of individual segment |  | 11.00% | 12.00% | 11.00% | 11.00%
United States Mechanical Construction And Facilities Services [Member] | UNITED STATES | Intersegment Eliminations [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ (3,246) | $ (1,479) | $ (8,143) | $ (4,345)
United States Building Services [Member] | UNITED STATES |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | 710,650 | 624,617 | 2,016,298 | 1,804,488
United States Building Services [Member] | UNITED STATES | Mobile Mechanical Services [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 462,401 | $ 408,949 | $ 1,275,298 | $ 1,172,663
Percent of individual segment |  | 65.00% | 65.00% | 63.00% | 65.00%
United States Building Services [Member] | UNITED STATES | Commercial Site-Based Services [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 199,957 | $ 166,375 | $ 596,589 | $ 494,873
Percent of individual segment |  | 28.00% | 27.00% | 30.00% | 27.00%
United States Building Services [Member] | UNITED STATES | Government Site-Based Services [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 48,292 | $ 49,293 | $ 144,411 | $ 136,952
Percent of individual segment |  | 7.00% | 8.00% | 7.00% | 8.00%
United States Industrial Services [Member] | UNITED STATES |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 247,239 | $ 232,218 | $ 842,524 | $ 702,763
United States Industrial Services [Member] | UNITED STATES | Field Services [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 213,866 | $ 196,846 | $ 732,826 | $ 613,197
Percent of individual segment |  | 87.00% | 85.00% | 87.00% | 87.00%
United States Industrial Services [Member] | UNITED STATES | Shop Services [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 33,373 | $ 35,372 | $ 109,698 | $ 89,566
Percent of individual segment |  | 13.00% | 15.00% | 13.00% | 13.00%
United Kingdom Building Services [Member] [Member] | UNITED KINGDOM |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 117,701 | $ 129,480 | $ 363,746 | $ 386,089
United Kingdom Building Services [Member] [Member] | UNITED KINGDOM | Service Work [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 51,762 | $ 65,486 | $ 170,840 | $ 194,049
Percent of individual segment |  | 44.00% | 51.00% | 47.00% | 50.00%
United Kingdom Building Services [Member] [Member] | UNITED KINGDOM | Project Work [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues from unrelated entities |  | $ 65,939 | $ 63,994 | $ 192,906 | $ 192,040
Percent of individual segment |  | 56.00% | 49.00% | 53.00% | 50.00%
[1] | Represents those projects which generally are completed within three months or less.

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