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NET REVENUES (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue from Contract with Customer [Abstract] |
Summary of Disaggregated Net Revenues | The Company disaggregates its net revenues primarily by segment, service type, and country from which revenues are invoiced, as the nature, timing and uncertainty of cash flows are relatively consistent within each of these categories. The following tables provide disclosure of disaggregated net revenues by segment for the years ended December 31, 2023, 2022, and 2021. During 2023, the Company moved an immaterial business component within the Safety Services segment from the HVAC to the Life Safety reporting unit, and prior period amounts in this table have been recast to reflect the current period presentation. Disaggregated net revenues information is as follows:
| Year Ended December 31, 2023
| Safety Services |  | Specialty Services |  | Consolidated
Life Safety | $ | 4,364 |  |  | $ | — |  |  | $ | 4,364 |
HVAC | 507 |  |  | — |  |  | 507 |
Infrastructure/Utility | — |  |  | 1,224 |  |  | 1,224 |
Fabrication | — |  |  | 202 |  |  | 202 |
Specialty Contracting | — |  |  | 653 |  |  | 653 |
Corporate and Eliminations | — |  |  | — |  |  | (22) |
Net revenues | $ | 4,871 |  |  | $ | 2,079 |  |  | $ | 6,928 |
| Year Ended December 31, 2022
| Safety Services |  | Specialty Services |  | Consolidated
Life Safety | $ | 4,077 |  |  | $ | — |  |  | $ | 4,077 |
HVAC | 498 |  |  | — |  |  | 498 |
Infrastructure/Utility | — |  |  | 1,154 |  |  | 1,154 |
Fabrication | — |  |  | 253 |  |  | 253 |
Specialty Contracting | — |  |  | 623 |  |  | 623 |
Corporate and Eliminations | — |  |  | — |  |  | (47) |
Net revenues | $ | 4,575 |  |  | $ | 2,030 |  |  | $ | 6,558 |
| Year Ended December 31, 2021
| Safety Services |  | Specialty Services |  | Consolidated
Life Safety | $ | 1,698 |  |  | $ | — |  |  | $ | 1,698 |
HVAC | 382 |  |  | — |  |  | 382 |
Infrastructure/Utility | — |  |  | 1,058 |  |  | 1,058 |
Fabrication | — |  |  | 244 |  |  | 244 |
Specialty Contracting | — |  |  | 605 |  |  | 605 |
Corporate and Eliminations | — |  |  | — |  |  | (47) |
Net revenues | $ | 2,080 |  |  | $ | 1,907 |  |  | $ | 3,940 |
| Year Ended December 31, 2023
| Safety Services |  | Specialty Services |  | Corporate and Eliminations |  | Consolidated
United States | $ | 2,322 |  |  | $ | 2,038 |  |  | $ | (22) |  |  | $ | 4,338 |
France | 607 |  |  | — |  |  | — |  |  | 607 |
Other | 1,942 |  |  | 41 |  |  | — |  |  | 1,983 |
Net revenues | $ | 4,871 |  |  | $ | 2,079 |  |  | $ | (22) |  |  | $ | 6,928 |
| Year Ended December 31, 2022
| Safety Services |  | Specialty Services |  | Corporate and Eliminations |  | Consolidated
United States | $ | 2,148 |  |  | $ | 1,961 |  |  | $ | (47) |  |  | $ | 4,062 |
France | 564 |  |  | — |  |  | — |  |  | 564 |
Other | 1,863 |  |  | 69 |  |  | — |  |  | 1,932 |
Net revenues | $ | 4,575 |  |  | $ | 2,030 |  |  | $ | (47) |  |  | $ | 6,558 |
| Year Ended December 31, 2021
| Safety Services |  | Specialty Services |  | Corporate and Eliminations |  | Consolidated
United States | $ | 1,726 |  |  | $ | 1,870 |  |  | $ | (47) |  |  | $ | 3,549 |
France | — |  |  | — |  |  | — |  |  | — |
Other | 354 |  |  | 37 |  |  | — |  |  | 391 |
Net revenues | $ | 2,080 |  |  | $ | 1,907 |  |  | $ | (47) |  |  | $ | 3,940 |
Summary of Accounts Receivable, Net of Allowances, Contract Assets and Contract Liabilities from Contracts with Customers | The balances of accounts receivable, net of allowances, contract assets and contract liabilities from contracts with customers as of December 31, 2023, 2022, and 2021 are as follows:
| Accounts receivable, net of allowances |  | Contract assets |  | Contract liabilities
Balance at December 31, 2023 | $ | 1,395 |  |  | $ | 436 |  |  | $ | 526 |
Balance at December 31, 2022 | 1,313 |  |  | 459 |  |  | 463 |
Balance at December 31, 2021 | 767 |  |  | 217 |  |  | 243 |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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