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Revenue from Contracts with Customers (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Revenue From Contract With Customers [Line Items] |  |  |  |  |
Performance obligation satisfied in previous period | $ 0 | $ 0 | $ 0 | $ 0 |
Change in estimate of transaction price | 0 | 0 | 0 | 0 |
Change in total estimated cost | 11,800,000 | $ 0 | 23,800,000 | $ 0 |
Allowance for credit losses | 23,869,000 |  | 23,869,000 |  | $ 23,534,000
Increase in net contract liabilities |  |  | 102,100,000 |  |
Contract asset impairment |  |  | 0 |  | $ 0
Remaining performance obligations | 6,461,132,000 |  | 6,461,132,000 |  |
Minimum [Member] |  |  |  |  |
Revenue From Contract With Customers [Line Items] |  |  |  |  |
Change in total estimated cost |  |  | 1,000,000 |  |
United States Electrical Construction And Facilities Services [Member] |  |  |  |  |
Revenue From Contract With Customers [Line Items] |  |  |  |  |
Change in total estimated cost | 7,700,000 |  | 14,300,000 |  |
United States Mechanical Construction And Facilities Services [Member] |  |  |  |  |
Revenue From Contract With Customers [Line Items] |  |  |  |  |
Change in total estimated cost | $ 4,100,000 |  | $ 9,500,000 |  |

X
- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References No definition available. + Details
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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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