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Net Revenues (Tables)

9 Months Ended

Sep. 30, 2021

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. Disaggregated net revenues information is as follows:

		Three Months Ended September 30, 2021
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
Life Safety		$	428			$	—			$	—			$	—			$	428
Heating, Ventilation and Air Conditioning ("HVAC")			105				—				—				—				105
Infrastructure/Utility			—				220				—				—				220
Fabrication			—				45				—				—				45
Specialty Contracting			—				171				—				—				171
Transmission			—				—				68				—				68
Civil			—				—				35				—				35
Corporate and Eliminations			—				—				—				(25	)			(25	)
Net revenues		$	533			$	436			$	103			$	(25	)		$	1,047

		Three Months Ended September 30, 2020
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
Life Safety		$	322			$	—			$	—			$	—			$	322
HVAC			82				—				—				—				82
Infrastructure/Utility			—				230				—				—				230
Fabrication			—				58				—				—				58
Specialty Contracting			—				112				—				—				112
Transmission			—				—				127				—				127
Civil			—				—				25				—				25
Inspection			—				—				6				—				6
Corporate and Eliminations			—				—				—				(4	)			(4	)
Net revenues		$	404			$	400			$	158			$	(4	)		$	958

		Nine Months Ended September 30, 2021
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
Life Safety		$	1,199			$	—			$	—			$	—			$	1,199
HVAC			312				—				—				—				312
Infrastructure/Utility			—				561				—				—				561
Fabrication			—				186				—				—				186
Specialty Contracting			—				425				—				—				425
Transmission			—				—				141				—				141
Civil			—				—				55				—				55
Corporate and Eliminations			—				—				—				(51	)			(51	)
Net revenues		$	1,511			$	1,172			$	196			$	(51	)		$	2,828

		Nine Months Ended September 30, 2020
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
Life Safety		$	963			$	—			$	—			$	—			$	963
HVAC			236				—				—				—				236
Infrastructure/Utility			—				615				—				—				615
Fabrication			—				129				—				—				129
Specialty Contracting			—				305				—				—				305
Transmission			—				—				336				—				336
Civil			—				—				50				—				50
Inspection			—				—				82				—				82
Corporate and Eliminations			—				—				—				(11	)			(11	)
Net revenues		$	1,199			$	1,049			$	468			$	(11	)		$	2,705

		Three Months Ended September 30, 2021
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
United States		$	452			$	436			$	92			$	(25	)		$	955
Canada and Europe			81				—				11				—				92
Net revenues		$	533			$	436			$	103			$	(25	)		$	1,047

		Three Months Ended September 30, 2020
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
United States		$	361			$	400			$	144			$	(4	)		$	901
Canada and Europe			43				—				14				—				57
Net revenues		$	404			$	400			$	158			$	(4	)		$	958

		Nine Months Ended September 30, 2021
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
United States		$	1,257			$	1,172			$	172			$	(51	)		$	2,550
Canada and Europe			254				—				24				—				278
Net revenues		$	1,511			$	1,172			$	196			$	(51	)		$	2,828

		Nine Months Ended September 30, 2020
		Safety Services				Specialty Services				Industrial Services				Corporate and Eliminations				Consolidated
United States		$	1,074			$	1,049			$	445			$	(11	)		$	2,557
Canada and Europe			125				—				23				—				148
Net revenues		$	1,199			$	1,049			$	468			$	(11	)		$	2,705

Summary of Accounts Receivable, Net of Allowances, Contract Assets and Contract Liabilities from Contracts with Customer

The opening and closing balances of accounts receivable, net of allowances, contract assets and contract liabilities from contracts with customers as of September 30, 2021 and December 31, 2020 are as follows:

		Accounts receivable, net of allowances				Contract Assets				Contract Liabilities
Balance as of September 30, 2021		$	723			$	224			$	238
Balance as of December 31, 2020			639				142				219

X

- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

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