Net Revenues (Tables)

12 Months Ended

Dec. 31, 2022

Revenues [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, 2022, 2021, and 2020. Prior period balances in this table have been recast to reflect current period presentation, as described in Note 2 - "Significant Accounting Policies." Disaggregated net revenues information is as follows:

	Year Ended December 31, 2022
	Safety Services		Specialty Services		Corporate and Eliminations			Consolidated
Life Safety	$	4,025	$	—	$	—		$	4,025
Heating, Ventilation, and Air Conditioning ("HVAC")		550		—		—			550
Infrastructure/Utility		—		1,154		—			1,154
Fabrication		—		253		—			253
Specialty Contracting		—		623		—			623
Corporate and Eliminations		—		—		(47	)		(47	)
Net revenues	$	4,575	$	2,030	$	(47	)	$	6,558

	Year Ended December 31, 2021
	Safety Services		Specialty Services		Corporate and Eliminations			Consolidated
Life Safety	$	1,647	$	—	$	—		$	1,647
HVAC		434		—		—			434
Infrastructure/Utility		—		1,057		—			1,057
Fabrication		—		244		—			244
Specialty Contracting		—		605		—			605
Corporate and Eliminations		—		—		(47	)		(47	)
Net revenues	$	2,081	$	1,906	$	(47	)	$	3,940

	Year Ended December 31, 2020
	Safety Services		Specialty Services		Corporate and Eliminations			Consolidated
Life Safety	$	1,317	$	—	$	—		$	1,317
HVAC		322		—		—			322
Infrastructure/Utility		—		1,370		—			1,370
Fabrication		—		178		—			178
Specialty Contracting		—		412		—			412
Corporate and Eliminations		—		—		(12	)		(12	)
Net revenues	$	1,639	$	1,960	$	(12	)	$	3,587

	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		355		36		—			391
Net revenues	$	2,081	$	1,906	$	(47	)	$	3,940

	Year Ended December 31, 2020
	Safety Services		Specialty Services		Corporate and Eliminations			Consolidated
United States	$	1,435	$	1,926	$	(12	)	$	3,349
France		—		—		—			—
Other		204		34		—			238
Net revenues	$	1,639	$	1,960	$	(12	)	$	3,587

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, 2022, 2021, and 2020 are as follows:

	Accounts receivable, net of allowances		Contract assets		Contract liabilities
Balance at December 31, 2020	$	639	$	142	$	219
Balance at December 31, 2021		767		217		243
Balance at December 31, 2022		1,313		459		463