APi (APG) 10-Q 10 Nov 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 03, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	APi Group Corporation
Entity Central Index Key	0001796209
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Address, Address Line One	1100 Old Highway 8 NW
Entity Address, City or Town	New Brighton
Entity Address, State or Province	MN
Entity Incorporation, State or Country Code	DE
Entity File Number	001-39275
Entity Tax Identification Number	98-1510303
Entity Address, Postal Zip Code	55112
City Area Code	651
Local Phone Number	636-4320
Entity Small Business	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock
Trading Symbol	APG
Security Exchange Name	NYSE
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		224,625,193
Document Quarterly Report	true
Document Transition Report	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 1,128	$ 515
Accounts receivable, net of allowances of $3 and $4 at September 30, 2021 and December 31, 2020, respectively	723	639
Inventories	71	64
Contract assets	224	142
Prepaid expenses and other current assets	93	77
Total current assets	2,239	1,437
Property and equipment, net	337	355
Operating lease right of use assets	102	107
Goodwill	1,099	1,082
Intangible assets, net	897	965
Deferred tax assets	86	89
Other assets	23	30
Total assets	4,783	4,065
Current liabilities:
Short-term and current portion of long-term debt	1	18
Accounts payable	205	150
Contingent consideration and compensation liabilities	22	41
Accrued salaries and wages	147	182
Deferred consideration		67
Other accrued liabilities	151	133
Contract liabilities	238	219
Operating and finance leases	28	31
Total current liabilities	792	841
Long-term debt, less current portion	1,469	1,397
Contingent consideration and compensation liabilities	11	22
Operating and finance leases	79	96
Deferred tax liabilities	45	45
Other noncurrent liabilities	90	106
Total liabilities	2,486	2,507
Shareholders’ equity:
Series A Preferred Shares, $0.0001 par value, 7 authorized shares, 4 shares issued and outstanding at September 30, 2021 and December 31, 2020
Common shares, $0.0001 par value, 500 authorized shares, 201 shares and 168 shares issued at September 30, 2021 and December 31, 2020, respectively (includes 12 shares declared for stock dividend at December 31, 2020)
Additional paid-in capital	2,559	1,856
Accumulated deficit	(252)	(284)
Accumulated other comprehensive loss	(10)	(14)
Total shareholders’ equity	2,297	1,558
Total liabilities and shareholders’ equity	$ 4,783	$ 4,065

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Sep. 30, 2021
Statement Of Financial Position [Abstract]
Accounts receivable net of allowances	$ 4	$ 3
Preferred stock no par value	$ 0.0001	$ 0.0001
Preferred Shares authorized	7,000,000	7,000,000
Preferred Shares issued	4,000,000	4,000,000
Preferred Shares outstanding	4,000,000	4,000,000
Common stock no par value	$ 0.0001	$ 0.0001
Common shares authorized	500,000,000	500,000,000
Common shares issued	168,000,000	224,000,000
Dividends declared in common shares	12,000,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net revenues	$ 1,047	$ 958	$ 2,828	$ 2,705
Cost of revenues	795	736	2,163	2,147
Gross profit	252	222	665	558
Selling, general, and administrative expenses	211	171	579	506
Impairment of goodwill and intangible assets		(11)		197
Operating income (loss)	41	62	86	(145)
Interest expense, net	14	13	43	41
Loss on extinguishment of debt			9
Investment income and other, net	(3)	(6)	(12)	(20)
Other expense, net	11	7	40	21
Income (loss) before income taxes	30	55	46	(166)
Income tax provision (benefit)	11	28	14	(35)
Net income (loss)	$ 19	$ 27	$ 32	$ (131)
Net income (loss) per common share:
Basic	$ 0.08	$ 0.14	$ 0.14	$ (0.77)
Diluted	$ 0.08	$ 0.13	$ 0.14	$ (0.77)
Weighted average shares outstanding:
Basic	204,851,780	169,387,541	199,472,387	169,501,289
Diluted	209,387,201	182,033,170	204,792,525	169,501,289

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 19	$ 27	$ 32	$ (131)
Other comprehensive income (loss):
Fair value change - derivatives, net of tax (expense) benefit of ($1), $0, ($4), and $10, respectively	5		13	(30)
Foreign currency translation adjustment	(9)	1	(9)	1
Comprehensive income (loss)	$ 15	$ 28	$ 36	$ (160)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Tax (expense) benefit	$ (1)	$ 0	$ (4)	$ 10

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning balance at Dec. 31, 2019	$ 1,757			$ 1,885	$ (131)	$ 3
Beginning balance (shares) at Dec. 31, 2019		4,000,000	169,902,260
Net income (loss)	(194)				(194)
Fair value change - derivatives	(27)					(27)
Foreign currency translation adjustment	(6)					(6)
Share cancellations	(6)			(6)
Share cancellations (shares)			(608,016)
Share-based compensation and other, net	1			1
Ending balance at Mar. 31, 2020	1,525			1,880	(325)	(30)
Ending balance (shares) at Mar. 31, 2020		4,000,000	169,294,244
Beginning balance at Dec. 31, 2019	1,757			1,885	(131)	3
Beginning balance (shares) at Dec. 31, 2019		4,000,000	169,902,260
Net income (loss)	(131)
Fair value change - derivatives	(30)
Foreign currency translation adjustment	1
Ending balance at Sep. 30, 2020	1,598			1,886	(262)	(26)
Ending balance (shares) at Sep. 30, 2020		4,000,000	169,544,244
Beginning balance at Mar. 31, 2020	1,525			1,880	(325)	(30)
Beginning balance (shares) at Mar. 31, 2020		4,000,000	169,294,244
Net income (loss)	36				36
Fair value change - derivatives	(3)					(3)
Foreign currency translation adjustment	6					6
Share-based compensation and other, net	1			1
Ending balance at Jun. 30, 2020	1,565			1,881	(289)	(27)
Ending balance (shares) at Jun. 30, 2020		4,000,000	169,294,244
Net income (loss)	27				27
Foreign currency translation adjustment	1					1
Warrants exercised	3			3
Warrants exercised (shares)			250,000
Share-based compensation and other, net	2			2
Ending balance at Sep. 30, 2020	1,598			1,886	(262)	(26)
Ending balance (shares) at Sep. 30, 2020		4,000,000	169,544,244
Beginning balance at Dec. 31, 2020	1,558			1,856	(284)	(14)
Beginning balance (shares) at Dec. 31, 2020		4,000,000	168,052,024
Net income (loss)	(8)				(8)
Fair value change - derivatives	(1)					(1)
Foreign currency translation adjustment	(4)					(4)
Preferred Share dividend			12,447,912
Warrants exercised	230			230
Warrants exercised (shares)			19,994,203
Profit sharing plan contributions	13			13
Profit sharing plan contributions (shares)			630,109
Share-based compensation and other, net	3			3
Share-based compensation and other, net (shares)			157,979
Ending balance at Mar. 31, 2021	1,791			2,102	(292)	(19)
Ending balance (shares) at Mar. 31, 2021		4,000,000	201,282,227
Beginning balance at Dec. 31, 2020	1,558			1,856	(284)	(14)
Beginning balance (shares) at Dec. 31, 2020		4,000,000	168,052,024
Net income (loss)	32
Fair value change - derivatives	13
Foreign currency translation adjustment	(9)
Ending balance at Sep. 30, 2021	2,297			2,559	(252)	(10)
Ending balance (shares) at Sep. 30, 2021		4,000,000	224,449,976
Beginning balance at Mar. 31, 2021	1,791			2,102	(292)	(19)
Beginning balance (shares) at Mar. 31, 2021		4,000,000	201,282,227
Net income (loss)	21				21
Fair value change - derivatives	9					9
Foreign currency translation adjustment	4					4
Share-based compensation and other, net	3			3
Share-based compensation and other, net (shares)			(1,140)
Ending balance at Jun. 30, 2021	1,828			2,105	(271)	(6)
Ending balance (shares) at Jun. 30, 2021		4,000,000	201,281,087
Net income (loss)	19				19
Fair value change - derivatives	5					5
Foreign currency translation adjustment	(9)					(9)
Issuance of common shares (shares)			22,716,049
Issuance of common shares	446			446
Share-based compensation and other, net	8			8
Share-based compensation and other, net (shares)			452,840
Ending balance at Sep. 30, 2021	$ 2,297			$ 2,559	$ (252)	$ (10)
Ending balance (shares) at Sep. 30, 2021		4,000,000	224,449,976

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash flows from operating activities:
Net income (loss)	$ 19	$ (8)	$ 27	$ (194)	$ 32	$ (131)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	20		21		59	62
Amortization	32		31		95	134
Impairment of goodwill and intangible assets						197
Deferred taxes					(1)	(49)
Share-based compensation expense					8	4
Profit-sharing expense					11	6
Non-cash lease expense					24	22
Loss on extinguishment of debt					9
Other, net					5	3
Changes in operating assets and liabilities, net of effects of business acquisitions:
Accounts receivable					(76)	93
Contract assets					(81)	(27)
Inventories					(5)	1
Prepaid expenses and other current assets					(11)	(19)
Accounts payable					54	(14)
Accrued liabilities and income taxes payable					(11)	46
Contract liabilities					16	57
Other assets and liabilities					(60)	(56)
Net cash provided by operating activities					68	329
Cash flows from investing activities:
Acquisitions, net of cash acquired					(51)	(6)
Purchases of property and equipment					(43)	(24)
Proceeds from sales of property, equipment, held for sale assets, and businesses					13	13
Net cash used in investing activities					(81)	(17)
Cash flows from financing activities:
Proceeds from long-term borrowings					350	2
Payments on long-term borrowings					(320)	(16)
Payments of debt issuance costs					(4)
Proceeds from share issuance and warrant exercises					676	3
Payments of acquisition-related consideration					(72)	(90)
Restricted shares tendered for taxes					(1)
Net cash provided by (used in) financing activities					629	(101)
Effect of foreign currency exchange rate change on cash and cash equivalents					(1)
Net increase in cash and cash equivalents					615	211
Cash, cash equivalents, and restricted cash, beginning of period		$ 515		$ 256	515	256	$ 256
Cash, cash equivalents, and restricted cash, end of period	$ 1,130		$ 467		1,130	467	$ 515
Supplemental cash flow disclosures:
Cash paid for interest					32	37
Cash paid for income taxes, net of refunds					55	19
Accrued consideration issued in business combinations					13	5
Shares issued to profit sharing plan					$ 13

Nature of Business

Nature of Business	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Nature of Business	NOTE 1. NATURE OF BUSINESS APi Group Corporation (the “Company” or “APG”) is a market-leading business services provider of safety, specialty, and industrial services in over 200 locations, primarily in North America and Europe.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	NOTE 2. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation The accompanying interim unaudited condensed consolidated financial statements (the “Interim Statements”) include the accounts of the Company and of its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. These Interim Statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) and do not include all of the information and footnotes required by generally accepted accounting principles in the United States of America (“U.S. GAAP”) for complete financial statements. The unaudited condensed consolidated balance sheet as of December 31, 2020 was derived from audited financial statements for the year then ended but does not include all of the information and footnotes required by U.S. GAAP with respect to annual financial statements. In the opinion of management, the Interim Statements include all adjustments (including normal recurring accruals) necessary for a fair presentation of the Company’s consolidated financial position, results of operations and cash flows for the dates and periods presented. It is recommended that these Interim Statements be read in conjunction with the Company’s audited annual consolidated financial statements and accompanying footnotes thereto for the year ended December 31, 2020 . Results for interim periods are not necessarily indicative of the results to be expected for a full fiscal year or for any future period. Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include cash on hand and highly liquid investments that have a maturity of three months or less when purchased. Restricted cash reflects collateral against certain bank guarantees. Restricted cash is reported as prepaid expenses and other current assets and other assets in the unaudited condensed consolidated balance sheets. Investments The Company holds investments in joint ventures which are accounted for under the equity method of accounting as the Company does not exercise control over the joint ventures. The Company’s share of earnings from the joint ventures w as $ 1 and $ 5 d uring the three months ended September 30, 2021 and 2020, respectively , and $ 3 and $ 12 d uring the nine months ended September 30, 2021 and 2020, respectively. The earnings are recorded w ithin investment income and other, net in the unaudited condensed consolidated statements of operations. The investment balances were $ 6 and $ 9 as of September 30, 2021 and December 31, 2020, respectively, and are recorded within other assets in the unaudited condensed consolidated balance sheets.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Sep. 30, 2021
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Recent Accounting Pronouncements	NOTE 3. RECENT ACCOUNTING PRONOUNCEMENTS See the recent accounting pronouncements discussion below for information pertaining to the effects of recently adopted and other recent accounting pronouncements as updated from the discussion in the Company’s 2020 audited consolidated financial statements included in the Company’s Form 10-K filed on March 24, 2021. Accounting standards issued and adopted: In January 2020, the Financial Accounting Standards Board (“FASB”) issued ASU 2020-01, Investments-Equity Securities (Topic 321), Investments-Equity Method and Joint Ventures (Topic 323), and Derivatives and Hedging (Topic 815): Clarifying the Interactions between Topic 321, Topic 323, and Topic 815 (“ASU 2020-01”) to clarify the interaction in accounting for equity securities under Topic 321, investments accounted for under the equity method of accounting in Topic 323, and the accounting for certain forward contracts and purchased options accounted for under Topic 815. ASU 2020-01 is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2020 with early adoption permitted. The Company adopted this ASU on January 1, 2021 and it did not have a material impact on its consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which eliminates certain exceptions to the existing guidance for income taxes related to the approach for intra-period tax allocations, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. This ASU also simplifies the accounting for income taxes by clarifying and amending existing guidance related to the effects of enacted changes in tax laws or rates in the effective tax rate computation, the recognition of franchise tax, and the evaluation of a step-up in the tax basis of goodwill, among other clarifications. ASU 2019-12 is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2020 with early adoption permitted. The Company adopted this ASU on January 1, 2021 and it had no impact on its consolidated financial statements. Accounting standards issued but not yet adopted: In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers ("ASU 2021-08"), which improves comparability after business combinations by providing consistent recognition and measurement guidance for revenue contracts with customers acquired in a business combination and revenue contracts with customers not acquired in a business combination. ASU 2021-08 is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2022, with early adoption permitted. The Company is currently evaluating the potential effect of this ASU on its consolidated financial statements.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Business Combinations	NOTE 4. BUSINESS COMBINATIONS The Company continually evaluates potential acquisitions that strategically fit within the Company’s existing portfolio or expand the Company’s portfolio into a new and attractive business area. Acquisitions are accounted for as business combinations using the acquisition method of accounting. As such, the Company makes a preliminary allocation of the purchase price to the tangible assets and identifiable intangible assets acquired and liabilities assumed. In the months after closing, as the Company obtains additional information about the acquired assets and liabilities and learns more about the newly acquired business, it is able to refine the estimates of fair value and more accurately allocate the purchase price. Purchase price is allocated to acquired assets and liabilities assumed based upon their estimated fair values as determined based on estimates and assumptions deemed reasonable by the Company. The Company engages third-party valuation specialists to assist with preparation of critical assumptions and calculations of the fair value of acquired intangible assets in connection with significant acquisitions. The excess of the purchase price over the tangible and intangible assets acquired and liabilities assumed is recorded as goodwill. Goodwill is attributable to the workforce of the acquired businesses, the complementary strategic fit and resulting synergies these businesses bring to existing operations, and the opportunities in new markets expected to be achieved from the expanded platform. 2021 Acquisitions During the nine months ended September 30, 2021, the Company completed the acquisition of Premier Fire & Security, Inc. ("Premier Fire") on July 1, 2021, and included in the Safety Services segment, as well as several other individually immaterial acquisitions. Total purchase consideration for all of the completed acquisitions of $ 68 consisted of cash paid at closing of $ 51 , net of cash acquired of $ 4 , and accrued consideration of $ 13 . The results of operations of these acquisitions are included in the Company’s unaudited condensed consolidated statement of operations from their respective dates of acquisition. Net revenues and operating income from material acquisitions were $ 9 and less than $ 1 , respectively, for the nine months ended September 30, 2021. The Company has not finalized its accounting for 2021 acquisitions. The Company will make appropriate adjustments to the purchase price allocation prior to completion of the measurement period, as required. Based on preliminary estimates, the total amount of goodwill from the 2021 acquisitions expected to be deductible for tax purposes is $ 21 . See N ote 6 – “Goodwill and Intangibles” for the provisional goodwill assigned to each segment. The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the dates of acquisition: Premier Fire Other 2021 Cash paid at closing $ 32 $ 23 Accrued consideration 7 6 Total consideration $ 39 $ 29 Cash $ 3 $ 1 Current assets 10 5 Property and equipment 1 2 Intangible assets, net 13 5 Goodwill 17 18 Current liabilities ( 5 ) ( 2 ) Noncurrent liabilities — — Net assets acquired $ 39 $ 29 On July 26, 2021, the Company entered into an agreement to acquire the Chubb Limited fire and security business from Carrier Global Corporation for an enterprise value of $ 3,100 , which is comprised of $ 2,900 cash and approximately $ 200 of assumed liabilities, subject to adjustments at closing. 2020 Acquisitions During 2020, the Company completed the acquisition of SK FireSafety (“SKG”) within the Safety Services segment and a number of other immaterial acquisitions for consideration transferred of $ 324 , which includes a cash payment made at closing of $ 319 , net of cash acquired, and $ 5 of accrued consideration that may be paid out in 1 -2 years from date of acquisition. SKG is a European market-leading provider of commercial safety services with operations primarily in the Netherlands, Belgium, Sweden, Norway, and the United Kingdom. On October 1, 2020, the Company completed the SKG Acquisition and acquired all of the outstanding stock. Through the acquisition of SKG, APG established a European platform for international organic and acquisition expansion. The other acquisitions were primarily in the Safety Services segment and based in the United States. The Company has finalized its accounting for all 2020 acquisitions. During Q2 2021, the Company recorded a measurement period adjustment, primarily related to intangible assets and goodwill, for which the resulting impact to amortization expense was immaterial. Based on final purchase price allocations, the total amount of goodwill from the 2020 acquisitions expected to be deductible for tax purposes is $ 20 . See Note 6 – “Goodwill and Intangibles” for the provisional goodwill assigned to each segment. The following table summarizes the fair values of the assets acquired and liabilities assumed at the dates of acquisition: Cash paid at closing $ 329 Accrued consideration 5 Total consideration $ 334 Cash $ 10 Current assets 76 Property and equipment 12 Customer relationships 82 Trade names and trademarks 16 Contractual backlog 1 Goodwill 215 Other noncurrent assets 14 Current liabilities ( 54 ) Noncurrent liabilities ( 38 ) Net assets acquired $ 334 Accrued Consideration The Company’s acquisition purchase agreements typically include deferred payment provisions, often to sellers who become employees of the Company. The provisions are made up of three general types of arrangements, contingent compensation and contingent consideration (both of which are contingent on the future performance of the acquired entity) and deferred payments related to indemnities. Contingent compensation arrangements are typically contingent on the former owner’s future employment with the Company, and the related amounts are recognized over the required employment period, which is typically three to five years . Contingent consideration arrangements are not contingent on employment and are included as part of purchase consideration at the time of the initial acquisition and are paid over a three to five year period. The liability for deferred payments is recognized at the date of acquisition based on the Company’s best estimate and is typically payable over a twelve - twenty-four month period. Deferred payments are not contingent on any future performance or employment obligations and can be offset for working capital true-ups, and representations and warranty items. The total contingent compensation arrangement liability was $ 13 and $ 39 at September 30, 2021 and December 31, 2020, respectively. The maximum payout of these arrangements upon completion of the future performance periods was $ 49 and $ 85 , inclusive of the $ 13 and $ 39 , accrued as of September 30, 2021 and December 31, 2020, respectively. The contingent compensation liability is included in contingent consideration and compensation liabilities in the unaudited condensed consolidated balance sheets for all periods presented. The Company primarily determines the contingent compensation liability based on forecasted cumulative earnings compared to the cumulative earnings target set forth in the arrangement. For one of the Company’s contingent compensation arrangements, the liability is determined based on the Monte Carlo Simulation method. Compensation expense associated with these arrangements is recognized ratably over the required employment period. For additional considerations regarding the fair value of the Company's contingent consideration liabilities, see Note 7 - "Fair Value of Financial Instruments." The total liability for deferred payments was $ 13 and $ 16 at September 30, 2021 and December 31, 2020, respectively, and are included in contingent consideration and compensation liabilities in the unaudited condensed consolidated balance sheets for all periods presented.

Net Revenues

Net Revenues	9 Months Ended
	Sep. 30, 2021
Revenues [Abstract]
Net Revenues	NOTE 5. NET REVENUES Under ASC 606, Revenue from Contracts with Customers (“ASC 606”) , revenue is recognized when or as control of promised goods and services is transferred to customers, and the amount of revenue recognized reflects the consideration to which an entity expects to be entitled in exchange for the goods and services transferred. Net revenues are primarily recognized by the Company over time utilizing the cost-to-cost measure of progress, consistent with the Company’s previous revenue recognition practices. Net revenues recognized at a point in time primarily relate to distribution contracts and were not material for the three and nine months ended September 30, 2021 and 2020, respectively. Contracts with Customers The Company derives net revenues primarily from Safety Services, Specialty Services and Industrial Services contracts with a duration of less than one week to three years (with the majority of contracts with durations of less than six months) which are subject to multiple pricing options, including fixed price, unit price, time and material, or cost plus a markup. The Company also enters into fixed price service contracts related to monitoring, maintenance and inspection of safety systems. The Company may utilize subcontractors in the fulfillment of its performance obligations. When doing so, the Company is considered the principal in these transactions and revenues are recognized on a gross basis. Net revenues for fixed price agreements are generally recognized over time using the cost-to-cost method of accounting, which measures progress based on the cost incurred relative to total expected cost in satisfying the performance obligation. The cost-to-cost method is used as it best depicts the continuous transfer of control of goods or services to the customer. Costs incurred include direct materials, labor and subcontract costs, and indirect costs related to contract performance, such as indirect labor, supplies, tools, repairs and depreciation costs. These contract costs are included in the results of operations under cost of revenues. Labor costs are considered to be incurred as the work is performed. Subcontractor labor is recognized as the work is performed. Net revenues from time and material contracts are recognized as the services are provided and is equal to the sum of the contract costs incurred plus an agreed upon markup. Net revenues earned from distribution contracts are recognized upon shipment or performance of the service. The cost estimation process for recognizing net revenues over time under the cost-to-cost method is based on the professional knowledge and experience of the Company’s project managers, engineers and finance professionals. Management reviews estimates of total contract transaction price and total project costs on an ongoing basis. Changes in job performance, job conditions, and management’s assessment of expected variable consideration are factors that influence estimates of the total contract transaction price, total costs to complete those contracts, and the Company’s profit recognition. Changes in these factors could result in cumulative revisions to net revenues in the period in which the revisions are determined, which could materially affect the Company’s consolidated results of operations for that period. Provisions for estimated losses on uncompleted contracts are recorded in the period in which such estimated losses are determined. 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 The Company’s contracts with its customers generally require significant services to integrate complex activities and equipment into a single deliverable and are, therefore, generally accounted for as a single performance obligation to provide a single contracted service for the duration of the project. For contracts with multiple performance obligations, the transaction price of a contract is allocated to each performance obligation and recognized as net revenues when or as the performance obligation is satisfied using the estimated stand-alone selling price of each distinct good or service. The stand-alone selling price is estimated using the expected cost plus a margin approach for each performance obligation. The Company utilizes the practical expedient under ASC 606 and does not disclose unsatisfied performance obligations for service contracts as these contracts generally have an original duration of less than one year. For those contracts with an original duration exceeding one year, the aggregate amount of transaction price allocated to the performance obligations unsatisfied at September 30, 2021 was $ 998 . The Company expects to recognize revenue on approximately 90 % of the remaining performance obligations over the next 12 months . When more than one contract is entered into with a customer on or close to the same date, management evaluates whether those contracts should be combined and accounted for as a single contract as well as whether those contracts should be accounted for as one, or more than one, performance obligation. This evaluation requires significant judgment and is based on the facts and circumstances of the various contracts. Contracts are often modified through change orders to account for changes in the scope and price of the goods or services being provided. Although the Company evaluates each change order to determine whether such modification creates a separate performance obligation, the majority of change orders are for goods or services not distinct within the context of the original contract and, therefore, not treated as separate performance obligations but rather as a modification of the existing contract and performance obligation. Variable Consideration Transaction prices for customer contracts may include variable consideration which comprises items such as early completion bonuses and liquidated damages provisions. Management estimates variable consideration for a performance obligation utilizing estimation methods believed to best predict the amount of consideration to which the Company will be entitled. Variable consideration is included in the transaction price only to the extent it is probable, in the Company’s judgment, that a significant future reversal in the amount of cumulative revenue recognized under the contract will not occur when the uncertainty associated with the variable consideration is subsequently resolved. Changes in the estimates of transaction prices are recognized in net revenues on a cumulative catch-up basis in the period in which the revisions to the estimates are made. Such changes in estimates may also result in the reversal of previously recognized net revenues if the ultimate outcome differs from the Company’s previous estimate. For the three and nine months ended September 30, 2021 and 2020, there were no significant reversals of net revenues recognized associated with the revision of transaction prices. The Company typically does not incur any returns, refunds or similar obligations after the completion of the performance obligation since any deficiencies are corrected during the course of performance. Contract Assets and Liabilities The Company typically invoices customers with payment terms of net due in 30 days . It is also common for contracts in the Company’s industries to specify a general contractor is not required to submit payments to a subcontractor until it has received those funds from the owner or funding source. In most instances, the Company receives payment of invoices between 30 to 90 days of the date of the invoice. The timing of revenue recognition may differ from the timing of invoicing to customers. Contract assets include unbilled amounts from the Company’s projects when net revenues are recognized under the cost-to-cost measure of progress and exceeds the amounts invoiced to the Company’s customers, as the amounts cannot be billed under the terms of the Company’s contracts. In addition, many of the Company’s time and material arrangements are billed in arrears pursuant to contract terms, resulting in contract assets being recorded as net revenues are recognized in advance of billings. The Company utilizes the practical expedient under ASC 606 and does not adjust for a significant financing component if the time between payment and the transfer of the related good or service is expected to be one year or less. The Company’s revenue arrangements are typically accounted for under such expedient as payments are within one year of performance for the Company’s services. As of September 30, 2021, none of the Company’s contracts contained a significant financing component. Contract liabilities from the Company’s contracts arise when amounts invoiced to the Company’s customers exceed net revenues recognized under the cost-to-cost measure of progress. Contract liabilities also include advance payments from the Company’s customers on certain contracts. Contract liabilities decrease as the Company recognizes net revenues from the satisfaction of the related performance obligation. Contract assets and liabilities are classified as current in the unaudited condensed consolidated balance sheets as all amounts are expected to be relieved within one year. 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 Contract Contract Balance as of September 30, 2021 $ 723 $ 224 $ 238 Balance as of December 31, 2020 639 142 219 The Company did not recognize significant net revenues associated with the final settlement of contract value for any projects completed in prior periods. In accordance with industry practice, accounts receivable includes retentions receivable, a portion of which may not be received within one year. At September 30, 2021 and December 31, 2020 , retentions receivable were $ 117 and $ 122 , respectively, while the portions that may not be received within one year were $ 21 and $ 26 , respectively. There were no other significant changes due to business acquisitions or significant changes in estimates of contract progress or transaction price. There were no significant impairments of contract assets recognized during the period. Costs to Obtain or Fulfill a Contract The Company generally does not incur significant incremental costs related to obtaining or fulfilling a contract prior to the start of a project. The Company may incur certain fulfilment costs such as initial design or mobilization costs which are capitalized if: (i) they relate directly to the contract; (ii) are expected to generate resources that will be used to satisfy the Company’s performance obligation under the contract; and (iii) are expected to be recovered through revenues generated under the contract. Such costs, which are amortized over the life of the respective project, were not material for any period presented.

Goodwill and Intangibles

Goodwill and Intangibles	9 Months Ended
	Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	NOTE 6. GOODWILL AND INTANGIBLES Goodwill The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2021 are as follows: Safety Specialty Industrial Total Goodwill as of December 31, 2020 $ 906 $ 172 $ 4 $ 1,082 Acquisitions 30 5 — 35 Measurement period adjustments and other (1) ( 18 ) — — ( 18 ) Goodwill as of September 30, 2021 $ 918 $ 177 $ 4 $ 1,099 (1) Measurement period adjustments related to the purchase accounting for SKG and finalization of certain immaterial acquisitions in 2020 (see Note 4 – “Business Combinations”). Other includes fluctuations due to foreign currency translation. As of September 30, 2020, the Company had recorded accumulated goodwill impairment charges of $ 193 , including $ 83 in the Safety Services segment, $ 52 in the Specialty Services segment, and $ 58 in the Industrial Services segment. During 2020, while the Company’s services were largely deemed essential under various governmental orders, the Company did experience negative impacts from COVID-19 on its operations including impacts from the Company’s suppliers, other vendors, and customer base. In addition to the impacts of COVID-19, the Company was also impacted by a significant decline in demand and volatility in oil prices as some of the Company’s services involve work within the energy industry. As a result of these factors and the significant decline in the Company’s market capitalization during the first quarter 2020, the Company concluded an impairment triggering event had occurred for all of its reporting units and performed impairment tests for its goodwill and recoverability tests for its long-lived assets, which primarily include finite-lived intangible assets, property and equipment and right of use lease assets. During the first quarter of 2020, based on preliminary carrying values from the October 1, 2019 acquisition of APi Group, Inc. (“APi Acquisition”), the Company determined goodwill was impaired as the preliminary carrying values of some reporting units exceeded fair values. During the nine months ended September 30, 2020, the Company recorded an impairment charge to goodwill of $ 193 . Intangibles The Company’s identifiable intangible assets are comprised of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 Weighted Average Gross Accumulated Net Carrying Amortized intangibles: Contractual backlog 1.0 $ 101 $ ( 96 ) $ 5 Customer relationships 6.6 845 ( 195 ) 650 Trade names 13.0 278 ( 36 ) 242 Total $ 1,224 $ ( 327 ) $ 897 December 31, 2020 Weighted Average Gross Accumulated Net Carrying Amortized intangibles: Contractual backlog 1.6 $ 101 $ ( 92 ) $ 9 Customer relationships 7.0 823 ( 119 ) 704 Trade names 13.8 274 ( 22 ) 252 Total $ 1,198 $ ( 233 ) $ 965 Amortization expense recognized on identifiable intangible assets are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Cost of revenues $ 2 $ 6 $ 5 $ 51 Selling, general, and administrative expense 30 25 90 83 Total intangible asset amortization expense $ 32 $ 31 $ 95 $ 134 During the year ended December 31, 2020, the Company finalized the fair value of goodwill and intangible assets related to the APi Acquisition. The measurement period adjustments recorded during the year ended December 31, 2020 resulted in a cumulative reversal to amortization expense that had been recorded earlier in the year. If the final intangible assets fair values had been known at the date of the APi Acquisition, amortization expense would have increased by $ 15 to $ 46 and by $ 5 to $ 139 for the three and nine months ended September 30, 2020, respectively.

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	NOTE 7. FAIR VALUE OF FINANCIAL INSTRUMENTS U.S. GAAP defines fair value as the price that would be received to sell an asset or transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. The authoritative guidance discusses valuation techniques, such as the market approach (comparable market prices), the income approach (present value of future income or cash flow), and the cost approach (cost to replace the service capacity of an asset or replacement cost). These valuation techniques are based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. As the basis for evaluating such inputs, a three-tier value hierarchy prioritizes the inputs used in measuring fair value as follows: Level 1: Observable inputs such as quoted prices for identical assets or liabilities in active markets. Level 2: Observable inputs other than quoted prices that are directly or indirectly observable for the asset or liability, including quoted prices for similar assets or liabilities in active markets; quoted prices for similar or identical assets or liabilities in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions. Recurring Fair Value Measurements The Company’s financial assets and liabilities (adjusted to fair value at least quarterly) are derivative instruments, which are primarily included in other noncurrent liabilities, and contingent consideration, which is primarily included in contingent consideration and compensation liabilities in the unaudited condensed consolidated balance sheets. The following tables summarize the fair values and levels within the fair value hierarchy in which the measurements fall for assets and liabilities measured on a recurring basis as of September 30, 2021 and December 31, 2020: Fair Value Measurements at September 30, 2021 Assets (Liabilities) Level 1 Level 2 Level 3 Total Derivatives designated as hedge instruments Interest rate swaps $ — $ ( 22 ) $ — $ ( 22 ) Cross currency swaps — 3 — 3 Net investment hedges — 6 — 6 Contingent consideration obligations — — ( 4 ) ( 4 ) $ — $ ( 13 ) $ ( 4 ) $ ( 17 ) Fair Value Measurements at December 31, 2020 Assets (Liabilities) Level 1 Level 2 Level 3 Total Derivatives designated as hedge instruments Interest rate swaps $ — $ ( 35 ) $ — $ ( 35 ) Derivatives not designated as hedge instruments Foreign currency contracts — ( 9 ) — ( 9 ) Contingent consideration obligations — — ( 7 ) ( 7 ) $ — $ ( 44 ) $ ( 7 ) $ ( 51 ) The Company determines the fair value of its derivative instruments designated as hedge instruments using standard pricing models and market-based assumptions for all inputs such as yield curves and quoted spot and forward exchange rates. Accordingly, the Company’s derivative instruments are classified as Level 2. The value of the contingent consideration obligations is determined using a probability-weighted discounted cash flow method. This fair value measurement is based on unobservable inputs in the market and thus represents a Level 3 measurement within the fair value hierarchy. This analysis reflects the contractual terms of the purchase agreements (e.g., potential payment amounts, length of measurement periods, manner of calculating any amounts due) and utilizes assumptions with regard to future cash flows, probabilities of achieving such future cash flows, and a discount rate. Depending on the contractual terms of the purchase agreement, the probability of achieving future cash flows or earnings generally represent the only significant unobservable inputs. The contingent consideration obligations are measured at fair value each reporting period and changes in estimates of fair value are recognized in earnings. The table below presents a reconciliation of the fair value of the Company’s contingent consideration obligations that use unobservable inputs (Level 3), as well as other information about the contingent consideration obligations: Nine Months Ended Balance as of December 31, 2020 $ 7 Issuances 3 Settlements ( 6 ) Adjustments to fair value — Balance as of September 30, 2021 $ 4 Number of open contingent consideration arrangements at the end of period 4 Maximum potential payout at end of period $ 5 At September 30, 2021, the remaining open contingent consideration arrangements are set to expire at various dates through 2024. Level 3 unobservable inputs were used to calculate the fair value adjustments shown in the table above. The fair value adjustments and the related unobservable inputs were not considered significant for the three and nine months ended September 30, 2021. Fair Value Estimates The following table presents the carrying amount and fair value of the Company’s non-variable interest rate debt (“ 4.125 % Senior Notes,” as defined in Note 10 – “Debt”), including current portion and excluding unamortized debt issuance costs, which is estimated by discounting future cash flows at currently available rates for borrowing arrangements with similar terms and conditions, which are considered to be Level 2 inputs under the fair value hierarchy. The carrying values of variable interest rate long-term debt, including current portions and excluding accrued interest, approximate their fair values because of the variable interest rates of these instruments, which generally are reset monthly. September 30, 2021 December 31, 2020 Carrying Value Fair Value Carrying Value Fair Value 4.125 % Senior Notes $ 350 $ 343 $ - $ -

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives	NOTE 8. DERIVATIVES From time to time, the Company enters into derivative transactions to hedge its exposure to fluctuations in interest and foreign currency rates. The Company does not enter into derivative transactions for trading purposes, and is not party to any derivatives that require collateral to be posted prior to settlement. Interest Rate Swaps The Company manages its fixed and floating rate debt mix using interest rate swaps. Interest rate swap contracts are used by the Company to separate interest rate risk management from the debt funding decision. The cash paid and received from the settlement of interest rate swaps is included in interest expense in the unaudited condensed consolidated statement of operations. At September 30, 2021, the Company had a 5-year $ 720 notional amount interest rate swap which effectively provides a fixed London Interbank Offering Rate (“LIBOR”) at 1.62 %. This interest rate swap is designated as a cash flow hedge of the interest rate risk attributable to the Company’s forecasted variable interest payments and has a maturity date of October 2024. Variations in the liability balance are primarily driven by changes in the applicable forward yield curves related to the LIBOR. The fair value of the interest rate swap designated as a hedging instrument was a liability of $ 22 and $ 35 as of September 30, 2021 and December 31, 2020, respectively. Cross Currency Swaps Currency exchange contracts utilized to maintain the functional currency value of expected financial transactions denominated in foreign currencies are designated as cash flow hedges. Gains and losses related to changes in the market value of these contracts are reported as a component of accumulated other comprehensive income (loss) (“AOCI”) within shareholders’ equity in the unaudited condensed consolidated balance sheets and reclassified to earnings in the same line item in the unaudited condensed consolidated statements of operations and in the same period as the recognition of the underlying hedged transaction. The Company periodically assesses whether its currency exchange contracts are effective, and when a contract is determined to be no longer effective as a hedge, the Company discontinues hedge accounting prospectively. During the first quarter of 2021, the Company entered into cross-currency swaps with gross notional U.S. dollar equivalent amount of $ 120 . The fair value of the cross-currency swaps was an asset of $ 3 as of September 30, 2021. Net Investment Hedge The Company has net investments in foreign subsidiaries subject to changes in foreign currency exchange rates. During the first quarter of 2021, the Company entered into a $ 230 notional foreign currency swap designated as a net investment hedge for a portion of the Company’s net investments in Euro-denominated subsidiaries. Gains and losses resulting from a change in fair value of the net investment hedge are offset by gains and losses on the underlying foreign currency exposure and are included in AOCI in the unaudited condensed consolidated balance sheets. During the third quarter of 2021, the Company amended the critical terms of the foreign currency swap by extending the maturity date and modifying the U.S. dollar and Euro coupons. The amended swap was redesignated as a net investment hedge as a result of the amendment, and the initial net investment hedge was dedesignated. The amended swap was redesignated as a net investment hedge and recorded at fair value with changes recorded in AOCI. The amended net investment hedge reduces the Company’s interest expense by approximately $ 3 annually and reduces its overall effective interest rate by approximately 24 basis points. The fair value of the amended net investment hedge was an asset of $ 6 as of September 30, 2021. The present value as of the date of designation of the dedesignated swap is recorded in AOCI on the unaudited condensed consolidated balance sheets. The fair value previously recognized in AOCI related to interest rate movements of the dedesignated swap and is being amortized to interest expense on a straight-line basis through the third quarter 2029. The amount amortized from AOCI into interest expense during the three and nine months ended September 30, 2021 was less than $ 1 . As of September 30, 2021, approximately $ 5 of unrealized pre-tax gains remained in AOCI. Foreign Currency Contracts The Company used foreign currency contracts, primarily forward foreign currency contracts, to mitigate the foreign currency exposure of certain other foreign currency transactions. At September 30, 2021, the Company had no foreign currency contracts outstanding that are not designated as hedging instruments for accounting purposes. Fair market value gains or losses on foreign currency contracts not designated as hedging instruments were included in the results of operations and are classified in investment income and other, net in the unaudited condensed consolidated statement of operations. The Company rec ognized income of $ 0 and $ 1 in investment income and other, net, during the three and nine months ended September 30, 2021, respectively, and $ 0 during the three and nine months ended September 30, 2020 related to derivatives not designated as hedging instruments. As of December 31, 2020, foreign currency contracts carried a liability balance of $ 9 and an asset balance of less than $ 1 .

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2021
Property Plant And Equipment [Abstract]
Property and Equipment, Net	NOTE 9. PROPERTY AND EQUIPMENT, NET The components of property and equipment as of September 30, 2021 and December 31, 2020 are as follows: Estimated September 30, December 31, Land N/A $ 26 $ 26 Building 39 77 76 Machinery and equipment 2 - 20 234 217 Autos and trucks 5 - 10 108 92 Office equipment 3 - 7 25 24 Leasehold improvements 1 - 15 16 14 Total cost 486 449 Accumulated depreciation ( 149 ) ( 94 ) Property and equipment, net $ 337 $ 355 Depreciation expense related to property and equipment, including finance leases, was $ 20 and $ 21 during the three months ended September 30, 2021 and 2020, respectively, and $ 59 and $ 62 during the nine months ended September 30, 2021 and 2020, respectively. Depreciation expense is included within cost of revenues and selling, general and administrative expenses in the unaudited condensed consolidated statements of operations. During the second quarter of 2020, the Company finalized the fair values of property and equipment acquired in the APi Acquisition. These measurement period adjustments resulted in a cumulative adjustment to depreciation expense. If the property and equipment fair values had been known at the date of the APi Acquisition, depreciation expense would have decreased by $ 2 to $ 60 for the nine months ended September 30, 2020.

Debt

Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Debt	NOTE 10. DEBT Debt obligations consist of the following: Maturity Date September 30, December 31, Term Loan Facility Revolving Credit Facility October 1, 2024 $ — $ — 2019 Term Loan October 1, 2026 1,140 1,188 2020 Term Loan October 1, 2026 — 250 4.125 % Senior Notes July 15, 2029 350 — Other Obligations 1 5 Total debt obligations 1,491 1,443 Less: unamortized deferred financing costs ( 21 ) ( 28 ) Total debt, net of deferred financing costs 1,470 1,415 Less: short-term and current portion of long-term debt ( 1 ) ( 18 ) Long-term debt, less current portion $ 1,469 $ 1,397 Term Loan Facility As of September 30, 2021 , the Company had $ 1,140 of principal outstanding under the 2019 Term Loan. As of September 30, 2021, the Company had a 5-year interest rate swap with respect to $ 720 of notional value of the 2019 Term Loan, exchanging one-month LIBOR for a fixed rate of 1.62 % per annum. Accordingly, the Company's fixed interest rate per annum on the swapped $720 notional value of the 2019 Term Loan is 4.12 % through its maturity. The remaining $ 420 of the 2019 Term Loan balance is bearing interest at 2.58 % per annum based on one-month LIBOR plus 250 basis points . Refer to Note 8 - "Derivatives" for additional information. The interest rate applicable to borrowings under the $ 300 five-year senior secured revolving credit facility (the “Revolving Credit Facility”) is, at the Company’s option, either (1) a base rate plus an applicable margin equal to 1.25 %, or (2) a Eurocurrency rate (adjusted for statutory reserves) plus an applicable margin equal to 2.25 %. At September 30, 2021 and December 31, 2020 , the Company had no amounts outstanding under the Revolving Credit Facility, and $ 226 and $ 230 was available at September 30, 2021 and December 31, 2020 , respectively, after giving effect to $ 74 and $ 70 of outstanding letters of credit . As of September 30, 2021 and December 31, 2020, the Company was in compliance with all applicable debt covenants. Senior Notes During the second quarter of 2021, APi Group DE, Inc, a wholly-owned subsidiary, completed a private offering of $ 350 aggregate principal amount of 4.125 % Senior Notes (“ 4.125% Senior Notes”) issued under an indenture dated June 22, 2021 (the “Indenture”). The 4.125% Senior Notes are fully and unconditionally guaranteed on a senior unsecured basis by the Company and certain of the Company’s existing and future domestic subsidiaries. The Company used the net proceeds from the sale of the 4.125% Senior Notes to repay the $ 250 million 2020 Term Loan, prepay a portion of the 2019 Term Loan and fund general corporate purposes. In connection with the repayment of the 2020 Term Loan and prepayment on the 2019 Term Loan, the Company incurred a loss on debt extinguishment of $ 9 related to unamortized debt issuance costs, which was recorded within loss on debt extinguishment in the unaudited condensed consolidated statements of operations. The Indenture contains customary terms and provisions (including representations, covenants, and conditions). Certain covenants, among other things, restrict the Company's, and restricted subsidiaries’, ability to (i) incur additional indebtedness; (ii) pay dividends or make other distributions or repurchase or redeem capital stock; (iii) prepay, redeem or repurchase certain debt; (iv) make loans and investments; (v) sell, transfer and otherwise dispose of assets; (vi) incur or permit to exist certain liens; (vii) enter into transactions with affiliates; (viii) enter into agreements restricting subsidiaries’ ability to pay dividends; and (ix) consolidate, amalgamate, merge or sell all or substantially all assets. The Indenture also contains customary events of default. The Company was in compliance with all covenants contained in the Indenture as of September 30, 2021. Other Obligations As of September 30, 2021 and December 31, 2020 , the Company had $ 1 and $ 5 in notes outstanding, respectively, for the acquisition of equipment and vehicles.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	Note 11. Income Taxes The Company’s quarterly income tax provision is measured using an estimate of its consolidated annual effective tax rate, adjusted in the current period for discrete income tax items, within the periods presented. The comparison of the Company’s income tax provision between periods may be impacted by the level and mix of earnings and losses by tax jurisdiction, foreign income tax rate differentials and discrete items. The Company’s effective tax rate was 38.5 % and 50.1 % for the three months ended September 30, 2021 and 2020, respectively and 31.3 % and 21.2 % for the nine months ended September 30, 2021 and 2020, respectively. The difference between the effective tax rate and the statutory U.S. Federal income tax rate of 21.0 % for the three and nine months ended September 30, 2021 and 2020 is due to nondeductible permanent items, state taxes and taxes on foreign earnings in jurisdictions that have higher tax rates. As of September 30, 2021, the Company’s deferred tax assets included a valuation allowance of $ 4 primarily related to certain deferred tax assets of the Company’s foreign subsidiaries and a capital loss carryforward in the U.S. The factors used to assess the likelihood of realization were the past performance of the related entities, forecasts of future taxable income, future reversals of existing taxable temporary differences, and available tax planning strategies that could be implemented to realize the deferred tax assets. The ability or failure to achieve the forecasted taxable income in these entities could affect the ultimate realization of deferred tax assets. As of September 30, 2021, the Company had gross federal, state and foreign net operating loss carryforwards of approximately $ 0 , $ 15 and $ 9 , respectively. The state net operating losses have carryforward periods of five to twenty years and begin to expire in 2024 . The foreign net operating losses generally have carryback periods of three years , carryforward periods of twenty years , or are indefinite, and begin to expire in 2034 . The Company’s liability for unrecognized tax benefits is recorded within other non-current liabilities in the consolidated balance sheets and recognizes interest and penalties accrued related to unrecognized tax benefits in the provision for income taxes in the income statement. As of September 30, 2021 and December 31, 2020, the total gross unrecognized tax benefits were $ 3 and $ 2 , respectively. The Company had accrued gross interest and penalties as of September 30, 2021 and December 31, 2020 of $ 1 and $ 1 , respectively. During the nine months ended September 30, 2021 and 2020, the Company recognized net interest expense of $ 0 for all periods. If all of the Company’s unrecognized tax benefits as of September 30, 2021 were recognized, $ 2 would impact the Company’s effective tax rate. The Company expects $ 1 of unrecognized tax benefits to expire in the next twelve months due to lapses in the statute of limitations. As of September 30, 2021, with few exceptions, neither the Company nor its subsidiaries are subject to examination prior to tax year 2014. The U.S. federal jurisdiction exam for the period ended December 31, 2017 closed in the third quarter. An adjustment for $ 1 was agreed to by the Company and the IRS. Because the Company was previously an S corporation, this adjustment passed through to the former shareholders of the Company and did not have an impact on the consolidated financial statements. There are various other audits in state and foreign jurisdictions. No adjustments have been proposed and the Company does not expect the results of the audits to have a material impact on the consolidated financial statements. On December 27, 2020, the Consolidated Appropriations Act was signed into law, which included a temporary provision that allows for a 100 percent deduction for business meals expenses purchased from a restaurant between December 31, 2020 and January 1, 2023. The tax law changes in the Consolidated Appropriations Act did not have a material impact on the Company’s quarterly income tax provision.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2021
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plans	Note 12. Employee Benefit Plans Certain Company subsidiaries, including certain subsidiaries in Canada, contribute amounts to multiemployer pension plans and other multiemployer benefit plans and trusts, which are recorded as a component of employee wages and salaries within costs of revenue. Contributions are generally based on fixed amounts per hour per employee for employees covered under these plans. Multiemployer plan contribution rates are determined annually and assessed on a pay-as-you-go basis based on union employee payrolls. Union payrolls cannot be determined for future periods because the number of union employees employed at a given time, and the plans in which they participate, vary depending upon the location and number of ongoing projects and the need for union resources in connection with those projects. Total consolidated contributions to multiemployer plans were $ 26 and $ 25 during the three months ended September 30, 2021 and 2020 , respectively and $ 69 and $ 71 during the nine months ended September 30, 2021 and 2020, respectively . The Company also has a trustee-administered profit sharing retirement plan covering substantially all of the Company's employees in the U.S. not covered by collective bargaining agreements and also adopted a profit sharing plan for employees in Canada (collectively, “Profit Sharing Plans”). The Profit Sharing Plans provide for annual discretionary contributions in amounts based on a performance grid as determined by the Company’s directors. In connection with these plans, the Company recognized $ 4 and less than $ 1 in expense during the three months ended September 30, 2021 and 2020, respectively and $ 11 and $ 6 in expense during the nine months ended September 30, 2021 and 2020, respectively. Effective January 1, 2021, most of the Company’s employees in the U.S and Canada, including named executive officers, are eligible to participate in the Company’s Employee Stock Purchase Plan (the “ESPP”). Sales of shares of the Company’s common stock under the ESPP are generally made pursuant to offerings that are intended to satisfy the requirements of Section 423 of the Internal Revenue Code. The ESPP permits employees of the Company to purchase common stock at a price equal to 85 % of the lesser of (i) the market value of the common stock on the first day of the offering period, or (ii) the market value of the common stock on the purchase date, whichever is lower. Participants are subject to eligibility requirements and may not purchase more than 500 shares in any offering period or more than ten thousand dollars of common stock in a year under the ESPP. During the three and nine months ended September 30, 2021, the Company has recognized $ 1 and $ 3 of expense, respectively, and issued 411,320 shares of the Company's common stock related to the ESPP.

Related-Party Transactions

Related-Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related-Party Transactions	Note 13. Related-Party Transactions An annual dividend for Series A Preferred Shares was declared as of December 31, 2020 and settled in shares during January 2021. The Company issued 12.4 million shares to Mariposa Acquisition IV, LLC, a related entity that is controlled by the co-chairperson of the Company’s Board of Directors. In addition, the Company incurred advisory fees of $ 1 during both the three months ended September 30, 2021 and 2020, and $ 3 during both the nine months ended September 30, 2021 and 2020, payable to Mariposa Capital, LLC, an entity owned by the co-chairperson of the Company’s Board of Directors. The Company has entered into a Securities Purchase Agreement with Viking Global Equities Master Ltd. and Viking Global Equities II LP ("Viking Purchasers"), an owner of more than 5 % of the Company's outstanding stock, to sell 200,000 Series B Preferred Shares (as defined in Note 14 - "Shareholders' Equity") for an aggregate purchase price of $ 200 . The Company has entered into sales contracts with Royal Oak Enterprises, an entity controlled by the co-chairperson of the Company's Board of Directors, and recorded $ 5 in net revenues for the nine months ended September 30, 2021, and as of September 30, 2021 had $ 2 in accounts receivable, net of allowances. From time to time the Company also enters into other immaterial related party transactions.

Shareholders' Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Shareholders' Equity	NOTE 14. SHAREHOLDERS’ EQUITY Preferred Shares Series A Preferred Shares The Company has 4,000,000 shares of Series A Preferred Stock issued and outstanding as of September 30, 2021 ("Series A Preferred Shares"). The Series A Preferred Shares will be automatically converted into shares of common stock on a one for one basis upon the last day of 2026. The holders of the Series A Preferred Shares are entitled to receive an annual dividend in the form of common stock or cash, at the Company’s sole option based on the increase in the market price of the Company’s common stock. Series B Preferred Shares On July 26, 2021, the Company entered into a Securities Purchase Agreement to sell 800,000 shares of the Company’s Series B Perpetual Convertible Preferred Stock, (the “Series B Preferred Shares”), for an aggregate purchase price of $ 800 . The holders of the Series B Preferred Shares will be entitled to dividends at the rate of 5.5 % per annum, payable in cash or the Company’s common stock, at the Company's election. The Series B Preferred Shares will rank senior to common stock and Series A Preferred Shares with respect to dividend rights and rights upon the voluntary or involuntary liquidation, dissolution, or winding up of the affairs of the Company. The Series B Preferred Shares will be convertible, at the holder’s option, into shares of the Company’s common stock at a conversion price equal to $ 24.60 per share, subject to certain adjustments. The Series B Preferred Shares rights include voting rights on an as-converted basis, certain pre-emptive rights on private equity offerings by the Company and certain registration rights. The Company intends to use the net proceeds from the Series B Preferred Shares issuance to fund a portion of the consideration for the Chubb Acquisition. The Series B Preferred Shares issuance is expected to close concurrently with the closing of the Chubb Acquisition, which is anticipated to be around year-end 2021. Common Shares During September 2021, the Company issued 22,716,049 shares of the Company’s common stock in a public underwritten offering. The proceeds from this offering totaled approximately $ 446 , net of related expenses. The Company expects to use the net proceeds from this offering for general corporate purposes, which may include future acquisitions and other business opportunities, capital expenditures and working capital.

Earnings (Loss) Per Share

Earnings (Loss) Per Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Note 15. Earnings (Loss) Per Share Net income is allocated between the Company’s common shares and other participating securities based on their participation rights. The Series A Preferred Shares represent participating securities. Earnings attributable to Series A Preferred Shares are not included in earnings attributable to common shares in calculating earnings per common share (the two-class method). For periods of net loss, there is no impact from the two-class method on earnings (loss) per share (“EPS”) as net loss is allocated to common shares because Series A Preferred Shares are not contractually obligated to share the loss. The following table sets forth the computation of earnings (loss) per common share using the two-class method. The dilutive effect of outstanding Series A Preferred Shares and the Series A Preferred Share dividend is reflected in diluted EPS using the if-converted method, and warrants, options, and restricted and performance shares are reflected using the treasury stock method. For periods of net loss, basic and diluted EPS are the same, as the assumed exercise of Series A Preferred Shares, restricted and performance shares, warrants and stock options are anti-dilutive (amounts in millions, except share and per share amounts): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Basic earnings (loss) per common share: Net income (loss) $ 19 $ 27 $ 32 $ ( 131 ) Less income attributable to Series A Preferred Shares ( 2 ) ( 4 ) ( 4 ) — Net income (loss) attributable to common shareholders - basic $ 17 $ 23 $ 28 $ ( 131 ) Weighted average shares outstanding - basic 204,851,780 169,387,541 199,472,387 169,501,289 Basic earnings (loss) per common share $ 0.08 $ 0.14 $ 0.14 $ ( 0.77 ) Diluted earnings (loss) per common share: Net income (loss) $ 19 $ 27 $ 32 $ ( 131 ) Less income attributable to Series A Preferred Shares ( 2 ) ( 4 ) ( 4 ) — Net income (loss) attributable to common shareholders - diluted $ 17 $ 23 $ 28 $ ( 131 ) Weighted average shares outstanding - basic 204,851,780 169,387,541 199,472,387 169,501,289 Dilutive securities: RSUs, warrants and stock options (1) 713,750 4,346,291 1,773,018 — Shares issuable pursuant to the annual Series A Preferred Share dividend (2) 3,821,671 8,299,338 3,547,120 — Weighted average shares outstanding - diluted 209,387,201 182,033,170 204,792,525 169,501,289 Diluted earnings (loss) per common share $ 0.08 $ 0.13 $ 0.14 $ ( 0.77 ) (1) For all periods presented, 4,000,000 Series A Preferred Shares, which are convertible to the same number of common shares, have been excluded from the calculation of diluted shares, as their inclusion would be anti-dilutive. For the nine months ended September 30, 2020, 162,500 stock options to purchase the same number of common shares and 21,265,359 common shares that would be issuable upon exercise of 63,796,076 warrants exercisable to purchase common shares on a 3:1 basis ( 21,265,359 ordinary share equivalents) for which the exercise price exceeded the average market price, have been excluded from the calculation of diluted shares, as their inclusion would be anti-dilutive. (2) For the three and nine months ended September 30, 2021, and the three months ended September 30, 2020, dilutive securities include common share equivalents which represent the annual dividend, payable in common shares, that Series A Preferred Shares would be entitled to receive assuming that the volume weighted average price of the Company’s common shares for the last ten trading days of the period would be the same average price during the last ten trading days of the calendar year. The annual dividend amount is equal to 20 % of the increase in the volume-weighted average market price per share of the Company’s common shares for the last ten trading days of the calendar year, multiplied by 141,194,638 shares (the “Annual Dividend Amount”). During 2020, the Annual Dividend Amount was calculated based on the Company’s share price appreciation over the initial offering price of $ 10.00 . During 2021, the Annual Dividend Amount was calculated based on the Company’s share price appreciation over the highest price previously used in calculating the Annual Dividend Amount of $ 17.8829 .

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Information	Note 16. Segment Information The Company manages its operations under three operating segments which represent the Company’s three reportable segments: Safety Services, Specialty Services, and Industrial Services. This structure is generally focused on various businesses related to contracting services and maintenance of industrial and commercial facilities. All three reportable segments derive their revenues from installation, inspection, maintenance, service and repair, retrofitting and upgrading, engineering and design, distribution, fabrication, and various types of other services primarily in the United States as well as Canada and Europe. The Safety Services segment focusing on end-to-end integrated occupancy systems (fire protection solutions, HVAC and entry systems), including design, installation, inspection and service of these integrated systems. The work performed within this segment spans across industries and facilities and includes commercial, education, healthcare, high tech, industrial and special-hazard settings. The Specialty Services segment provides a variety of infrastructure services and specialized industrial plant services, which includes maintenance and repair of critical infrastructure such as underground electric, gas, water, sewer and telecommunications infrastructure. This segment’s services include engineering and design, fabrication, installation, maintenance service and repair, and retrofitting and upgrading. Customers within this segment vary from private and public utilities, communications, healthcare, education, transportation, manufacturing, industrial plants and governmental agencies throughout the United States. The Industrial Services segment provides a variety of services to the energy industry focused on transmission and distribution. This segment’s services include pipeline infrastructure, access and road construction, supporting facilities, and performing ongoing integrity management and maintenance The accounting policies of the reportable segments are the same as those described in Note 2 – “Basis of Presentation and Significant Accounting Policies.” All intercompany transactions and balances are eliminated in consolidation. Intercompany revenues and costs between entities within a reportable segment are eliminated to arrive at segment totals and eliminations between segments are separately presented. Corporate results include amounts related to corporate functions such as administrative costs, professional fees, acquisition-related transaction costs (exclusive of acquisition integration costs, which are included within the segment results of the acquired businesses), and other discrete items. Earnings before interest, taxes, depreciation and amortization (“EBITDA”) is the measure of profitability used by management to manage its segments and, accordingly, in its segment reporting. As appropriate, the Company supplements the reporting of consolidated financial information determined in accordance with U.S. GAAP with certain non-U.S. GAAP financial measures, including EBITDA. The Company believes these non-U.S. GAAP measures provide meaningful information and help investors understand the Company’s financial results and assess its prospects for future performance. The Company uses EBITDA to evaluate its performance, both internally and as compared with its peers, because it excludes certain items that may not be indicative of the Company’s core operating results for its reportable segments. Segment EBITDA is calculated in a manner consistent with consolidated EBITDA. Summarized financial information for the Company’s reportable segments is presented and reconciled to consolidated financial information in the following tables, including a reconciliation of consolidated operating income to EBITDA. The tables below may contain slight summation differences due to rounding: Three Months Ended September 30, 2021 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 533 $ 436 $ 103 $ ( 25 ) $ 1,047 EBITDA Reconciliation Operating income (loss) $ 56 $ 31 $ — $ ( 46 ) $ 41 Plus: Investment income and other, net — 3 1 ( 1 ) 3 Depreciation 3 11 5 1 20 Amortization 16 11 3 2 32 EBITDA $ 75 $ 56 $ 9 $ ( 44 ) $ 96 Total assets $ 3,108 $ 1,284 $ 198 $ 193 $ 4,783 Capital expenditures 3 4 2 — 9 Three Months Ended September 30, 2020 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 404 $ 400 $ 158 $ ( 4 ) $ 958 EBITDA Reconciliation Operating income (loss) $ ( 24 ) $ 105 $ 17 $ ( 36 ) $ 62 Plus: Investment income and other, net 4 5 — ( 3 ) 6 Depreciation 2 11 6 2 21 Amortization 35 5 ( 10 ) 1 31 EBITDA $ 17 $ 126 $ 13 $ ( 36 ) $ 120 Total assets $ 1,702 $ 1,105 $ 341 $ 678 $ 3,826 Capital expenditures — 5 2 — 7 Nine Months Ended September 30, 2021 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 1,511 $ 1,172 $ 196 $ ( 51 ) $ 2,828 EBITDA Reconciliation Operating income (loss) $ 153 $ 60 $ ( 23 ) $ ( 104 ) $ 86 Plus: Investment income and other, net 5 5 3 ( 1 ) 12 Loss on extinguishment of debt — — — ( 9 ) ( 9 ) Depreciation 6 32 17 4 59 Amortization 49 34 9 3 95 EBITDA $ 213 $ 131 $ 6 $ ( 107 ) $ 243 Total assets $ 3,108 $ 1,284 $ 198 $ 193 $ 4,783 Capital expenditures 5 25 13 — 43 Nine Months Ended September 30, 2020 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 1,199 $ 1,049 $ 468 $ ( 11 ) $ 2,705 EBITDA Reconciliation Operating income (loss) $ ( 12 ) $ ( 9 ) $ ( 37 ) $ ( 87 ) $ ( 145 ) Plus: Investment income and other, net 9 13 — ( 2 ) 20 Depreciation 4 35 19 4 62 Amortization 83 41 7 3 134 EBITDA $ 84 $ 80 $ ( 11 ) $ ( 82 ) $ 71 Total assets $ 1,702 $ 1,105 $ 341 $ 678 $ 3,826 Capital expenditures 1 14 8 1 24

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Events	Note 17. SUBSEQUENT EVENTS In October 2021, APi Escrow Corp. (the “Escrow Issuer”), a wholly-owned subsidiary of the Company, completed a private offering of $ 300 aggregate principal amount of 4.750 % Senior Notes due 2029 ("4.750% Senior Notes"). The Company intends to use the net proceeds from the sale of the 4.750% Senior Notes to finance a portion of the consideration for the Chubb Acquisition and related fees and expenses. The gross proceeds from the offering (plus an additional amount in cash sufficient to fund a Special Mandatory Redemption on the last day of the third full calendar month following the closing of the offering) were deposited into an escrow account. If and when the Chubb Acquisition occurs, the Special Mandatory Redemption provisions will terminate and the Escrow Issuer will merge with and into APi Group DE, Inc. (“APi DE”), a wholly-owned subsidiary of the Company, with APi DE continuing as the surviving entity. Upon the merger, APi DE will assume all of the obligations of the Escrow Issuer, and at that time the 4.750% Senior Notes will be fully and unconditionally guaranteed on a senior unsecured basis by the Company and certain of the Company’s existing and future subsidiaries. If escrow conditions, including the closing of the Chubb Acquisition, do not occur on or prior to October 27, 2022, the Escrow Issuer must redeem all of the 4.750% Senior Notes at a price equal to the principal amount of the Senior Notes plus accrued interest (the “Special Mandatory Redemption”). If the escrow conditions do occur prior to October 27, 2022, then all amounts in the escrow account will be released to fund the Chubb Acquisition and related fees and expenses.

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The accompanying interim unaudited condensed consolidated financial statements (the “Interim Statements”) include the accounts of the Company and of its wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation. These Interim Statements have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission (“SEC”) and do not include all of the information and footnotes required by generally accepted accounting principles in the United States of America (“U.S. GAAP”) for complete financial statements. The unaudited condensed consolidated balance sheet as of December 31, 2020 was derived from audited financial statements for the year then ended but does not include all of the information and footnotes required by U.S. GAAP with respect to annual financial statements. In the opinion of management, the Interim Statements include all adjustments (including normal recurring accruals) necessary for a fair presentation of the Company’s consolidated financial position, results of operations and cash flows for the dates and periods presented. It is recommended that these Interim Statements be read in conjunction with the Company’s audited annual consolidated financial statements and accompanying footnotes thereto for the year ended December 31, 2020 . Results for interim periods are not necessarily indicative of the results to be expected for a full fiscal year or for any future period.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash Cash and cash equivalents include cash on hand and highly liquid investments that have a maturity of three months or less when purchased. Restricted cash reflects collateral against certain bank guarantees. Restricted cash is reported as prepaid expenses and other current assets and other assets in the unaudited condensed consolidated balance sheets.
Investments	Investments The Company holds investments in joint ventures which are accounted for under the equity method of accounting as the Company does not exercise control over the joint ventures. The Company’s share of earnings from the joint ventures w as $ 1 and $ 5 d uring the three months ended September 30, 2021 and 2020, respectively , and $ 3 and $ 12 d uring the nine months ended September 30, 2021 and 2020, respectively. The earnings are recorded w ithin investment income and other, net in the unaudited condensed consolidated statements of operations. The investment balances were $ 6 and $ 9 as of September 30, 2021 and December 31, 2020, respectively, and are recorded within other assets in the unaudited condensed consolidated balance sheets.

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Summary of Preliminary Fair Value of Consideration Transferred and the Preliminary Estimated Fair Values of the Assets Acquired and Liabilities Assumed	The following table summarizes the preliminary estimated fair values of the assets acquired and liabilities assumed at the dates of acquisition: Premier Fire Other 2021 Cash paid at closing $ 32 $ 23 Accrued consideration 7 6 Total consideration $ 39 $ 29 Cash $ 3 $ 1 Current assets 10 5 Property and equipment 1 2 Intangible assets, net 13 5 Goodwill 17 18 Current liabilities ( 5 ) ( 2 ) Noncurrent liabilities — — Net assets acquired $ 39 $ 29 The following table summarizes the fair values of the assets acquired and liabilities assumed at the dates of acquisition: Cash paid at closing $ 329 Accrued consideration 5 Total consideration $ 334 Cash $ 10 Current assets 76 Property and equipment 12 Customer relationships 82 Trade names and trademarks 16 Contractual backlog 1 Goodwill 215 Other noncurrent assets 14 Current liabilities ( 54 ) Noncurrent liabilities ( 38 ) Net assets acquired $ 334

Net Revenues (Tables)

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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Specialty Industrial Corporate and 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 Contract Contract Balance as of September 30, 2021 $ 723 $ 224 $ 238 Balance as of December 31, 2020 639 142 219

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Changes In Carrying Amounts of Goodwill By Reportable Segments	The changes in the carrying amount of goodwill by reportable segment for the nine months ended September 30, 2021 are as follows: Safety Specialty Industrial Total Goodwill as of December 31, 2020 $ 906 $ 172 $ 4 $ 1,082 Acquisitions 30 5 — 35 Measurement period adjustments and other (1) ( 18 ) — — ( 18 ) Goodwill as of September 30, 2021 $ 918 $ 177 $ 4 $ 1,099 (1) Measurement period adjustments related to the purchase accounting for SKG and finalization of certain immaterial acquisitions in 2020 (see Note 4 – “Business Combinations”). Other includes fluctuations due to foreign currency translation.
Summary of Identifiable Intangible Assets	The Company’s identifiable intangible assets are comprised of the following as of September 30, 2021 and December 31, 2020: September 30, 2021 Weighted Average Gross Accumulated Net Carrying Amortized intangibles: Contractual backlog 1.0 $ 101 $ ( 96 ) $ 5 Customer relationships 6.6 845 ( 195 ) 650 Trade names 13.0 278 ( 36 ) 242 Total $ 1,224 $ ( 327 ) $ 897 December 31, 2020 Weighted Average Gross Accumulated Net Carrying Amortized intangibles: Contractual backlog 1.6 $ 101 $ ( 92 ) $ 9 Customer relationships 7.0 823 ( 119 ) 704 Trade names 13.8 274 ( 22 ) 252 Total $ 1,198 $ ( 233 ) $ 965
Summary of Amortization Expense Recognized on Identifiable Intangible Assets	Amortization expense recognized on identifiable intangible assets are as follows: Three Months Ended September 30, Nine Months Ended September 30, 2021 2020 2021 2020 Cost of revenues $ 2 $ 6 $ 5 $ 51 Selling, general, and administrative expense 30 25 90 83 Total intangible asset amortization expense $ 32 $ 31 $ 95 $ 134

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Summary of Fair Value Measurement Assets And Liabilities Measured On Recurring Basis	The following tables summarize the fair values and levels within the fair value hierarchy in which the measurements fall for assets and liabilities measured on a recurring basis as of September 30, 2021 and December 31, 2020: Fair Value Measurements at September 30, 2021 Assets (Liabilities) Level 1 Level 2 Level 3 Total Derivatives designated as hedge instruments Interest rate swaps $ — $ ( 22 ) $ — $ ( 22 ) Cross currency swaps — 3 — 3 Net investment hedges — 6 — 6 Contingent consideration obligations — — ( 4 ) ( 4 ) $ — $ ( 13 ) $ ( 4 ) $ ( 17 ) Fair Value Measurements at December 31, 2020 Assets (Liabilities) Level 1 Level 2 Level 3 Total Derivatives designated as hedge instruments Interest rate swaps $ — $ ( 35 ) $ — $ ( 35 ) Derivatives not designated as hedge instruments Foreign currency contracts — ( 9 ) — ( 9 ) Contingent consideration obligations — — ( 7 ) ( 7 ) $ — $ ( 44 ) $ ( 7 ) $ ( 51 )
Summary of Reconciliation of Fair Value of Contingent Consideration Obligations	The table below presents a reconciliation of the fair value of the Company’s contingent consideration obligations that use unobservable inputs (Level 3), as well as other information about the contingent consideration obligations: Nine Months Ended Balance as of December 31, 2020 $ 7 Issuances 3 Settlements ( 6 ) Adjustments to fair value — Balance as of September 30, 2021 $ 4 Number of open contingent consideration arrangements at the end of period 4 Maximum potential payout at end of period $ 5
Summary of Carrying And Fair Value Of Non-Variable Interest Rate Debt	The following table presents the carrying amount and fair value of the Company’s non-variable interest rate debt (“ 4.125 % Senior Notes,” as defined in Note 10 – “Debt”), including current portion and excluding unamortized debt issuance costs, which is estimated by discounting future cash flows at currently available rates for borrowing arrangements with similar terms and conditions, which are considered to be Level 2 inputs under the fair value hierarchy. The carrying values of variable interest rate long-term debt, including current portions and excluding accrued interest, approximate their fair values because of the variable interest rates of these instruments, which generally are reset monthly. September 30, 2021 December 31, 2020 Carrying Value Fair Value Carrying Value Fair Value 4.125 % Senior Notes $ 350 $ 343 $ - $ -

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2021
Property Plant And Equipment [Abstract]
Summary of Components of Property and Equipment	The components of property and equipment as of September 30, 2021 and December 31, 2020 are as follows: Estimated September 30, December 31, Land N/A $ 26 $ 26 Building 39 77 76 Machinery and equipment 2 - 20 234 217 Autos and trucks 5 - 10 108 92 Office equipment 3 - 7 25 24 Leasehold improvements 1 - 15 16 14 Total cost 486 449 Accumulated depreciation ( 149 ) ( 94 ) Property and equipment, net $ 337 $ 355

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Summary of Debt Obligations	Debt obligations consist of the following: Maturity Date September 30, December 31, Term Loan Facility Revolving Credit Facility October 1, 2024 $ — $ — 2019 Term Loan October 1, 2026 1,140 1,188 2020 Term Loan October 1, 2026 — 250 4.125 % Senior Notes July 15, 2029 350 — Other Obligations 1 5 Total debt obligations 1,491 1,443 Less: unamortized deferred financing costs ( 21 ) ( 28 ) Total debt, net of deferred financing costs 1,470 1,415 Less: short-term and current portion of long-term debt ( 1 ) ( 18 ) Long-term debt, less current portion $ 1,469 $ 1,397

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Summary of Computation Earnings (Loss) Per Common Share Using Two Class Method	The following table sets forth the computation of earnings (loss) per common share using the two-class method. The dilutive effect of outstanding Series A Preferred Shares and the Series A Preferred Share dividend is reflected in diluted EPS using the if-converted method, and warrants, options, and restricted and performance shares are reflected using the treasury stock method. For periods of net loss, basic and diluted EPS are the same, as the assumed exercise of Series A Preferred Shares, restricted and performance shares, warrants and stock options are anti-dilutive (amounts in millions, except share and per share amounts): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Basic earnings (loss) per common share: Net income (loss) $ 19 $ 27 $ 32 $ ( 131 ) Less income attributable to Series A Preferred Shares ( 2 ) ( 4 ) ( 4 ) — Net income (loss) attributable to common shareholders - basic $ 17 $ 23 $ 28 $ ( 131 ) Weighted average shares outstanding - basic 204,851,780 169,387,541 199,472,387 169,501,289 Basic earnings (loss) per common share $ 0.08 $ 0.14 $ 0.14 $ ( 0.77 ) Diluted earnings (loss) per common share: Net income (loss) $ 19 $ 27 $ 32 $ ( 131 ) Less income attributable to Series A Preferred Shares ( 2 ) ( 4 ) ( 4 ) — Net income (loss) attributable to common shareholders - diluted $ 17 $ 23 $ 28 $ ( 131 ) Weighted average shares outstanding - basic 204,851,780 169,387,541 199,472,387 169,501,289 Dilutive securities: RSUs, warrants and stock options (1) 713,750 4,346,291 1,773,018 — Shares issuable pursuant to the annual Series A Preferred Share dividend (2) 3,821,671 8,299,338 3,547,120 — Weighted average shares outstanding - diluted 209,387,201 182,033,170 204,792,525 169,501,289 Diluted earnings (loss) per common share $ 0.08 $ 0.13 $ 0.14 $ ( 0.77 ) (1) For all periods presented, 4,000,000 Series A Preferred Shares, which are convertible to the same number of common shares, have been excluded from the calculation of diluted shares, as their inclusion would be anti-dilutive. For the nine months ended September 30, 2020, 162,500 stock options to purchase the same number of common shares and 21,265,359 common shares that would be issuable upon exercise of 63,796,076 warrants exercisable to purchase common shares on a 3:1 basis ( 21,265,359 ordinary share equivalents) for which the exercise price exceeded the average market price, have been excluded from the calculation of diluted shares, as their inclusion would be anti-dilutive. (2) For the three and nine months ended September 30, 2021, and the three months ended September 30, 2020, dilutive securities include common share equivalents which represent the annual dividend, payable in common shares, that Series A Preferred Shares would be entitled to receive assuming that the volume weighted average price of the Company’s common shares for the last ten trading days of the period would be the same average price during the last ten trading days of the calendar year. The annual dividend amount is equal to 20 % of the increase in the volume-weighted average market price per share of the Company’s common shares for the last ten trading days of the calendar year, multiplied by 141,194,638 shares (the “Annual Dividend Amount”). During 2020, the Annual Dividend Amount was calculated based on the Company’s share price appreciation over the initial offering price of $ 10.00 . During 2021, the Annual Dividend Amount was calculated based on the Company’s share price appreciation over the highest price previously used in calculating the Annual Dividend Amount of $ 17.8829 .

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Summary of Reconciliation Operating Income to EBITDA	Summarized financial information for the Company’s reportable segments is presented and reconciled to consolidated financial information in the following tables, including a reconciliation of consolidated operating income to EBITDA. The tables below may contain slight summation differences due to rounding: Three Months Ended September 30, 2021 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 533 $ 436 $ 103 $ ( 25 ) $ 1,047 EBITDA Reconciliation Operating income (loss) $ 56 $ 31 $ — $ ( 46 ) $ 41 Plus: Investment income and other, net — 3 1 ( 1 ) 3 Depreciation 3 11 5 1 20 Amortization 16 11 3 2 32 EBITDA $ 75 $ 56 $ 9 $ ( 44 ) $ 96 Total assets $ 3,108 $ 1,284 $ 198 $ 193 $ 4,783 Capital expenditures 3 4 2 — 9 Three Months Ended September 30, 2020 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 404 $ 400 $ 158 $ ( 4 ) $ 958 EBITDA Reconciliation Operating income (loss) $ ( 24 ) $ 105 $ 17 $ ( 36 ) $ 62 Plus: Investment income and other, net 4 5 — ( 3 ) 6 Depreciation 2 11 6 2 21 Amortization 35 5 ( 10 ) 1 31 EBITDA $ 17 $ 126 $ 13 $ ( 36 ) $ 120 Total assets $ 1,702 $ 1,105 $ 341 $ 678 $ 3,826 Capital expenditures — 5 2 — 7 Nine Months Ended September 30, 2021 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 1,511 $ 1,172 $ 196 $ ( 51 ) $ 2,828 EBITDA Reconciliation Operating income (loss) $ 153 $ 60 $ ( 23 ) $ ( 104 ) $ 86 Plus: Investment income and other, net 5 5 3 ( 1 ) 12 Loss on extinguishment of debt — — — ( 9 ) ( 9 ) Depreciation 6 32 17 4 59 Amortization 49 34 9 3 95 EBITDA $ 213 $ 131 $ 6 $ ( 107 ) $ 243 Total assets $ 3,108 $ 1,284 $ 198 $ 193 $ 4,783 Capital expenditures 5 25 13 — 43 Nine Months Ended September 30, 2020 Safety Specialty Industrial Corporate and Consolidated Net revenues $ 1,199 $ 1,049 $ 468 $ ( 11 ) $ 2,705 EBITDA Reconciliation Operating income (loss) $ ( 12 ) $ ( 9 ) $ ( 37 ) $ ( 87 ) $ ( 145 ) Plus: Investment income and other, net 9 13 — ( 2 ) 20 Depreciation 4 35 19 4 62 Amortization 83 41 7 3 134 EBITDA $ 84 $ 80 $ ( 11 ) $ ( 82 ) $ 71 Total assets $ 1,702 $ 1,105 $ 341 $ 678 $ 3,826 Capital expenditures 1 14 8 1 24

Nature of Business - Additional

Nature of Business - Additional Information (Detail)	Sep. 30, 2021Location
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Number of locations	200

Basis of Presentation and Sig_3

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Earnings	$ 19	$ 21	$ (8)	$ 27	$ 36	$ (194)	$ 32	$ (131)
Joint Ventures [Member] | Other Assets [Member]
Investment balance	6						6		$ 9
Joint Ventures [Member] | Investment Income and Other, Net [Member]
Earnings	$ 1			$ 5			$ 3	$ 12

Recent Accounting Pronounceme_2

Recent Accounting Pronouncements - Additional Information (Detail)	Sep. 30, 2021
ASU 2020-01 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2021
Change in accounting principle, accounting standards update, immaterial effect	true
ASU 2019-12 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Change in accounting principle, accounting standards update, adopted	true
Change in accounting principle, accounting standards update, adoption date	Jan. 1, 2021
Change in accounting principle, accounting standards update, immaterial effect	true

Business Combinations - Additio

Business Combinations - Additional Information (Detail) - USD ($)	Jul. 26, 2021	Oct. 01, 2019	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Cash payment			$ 51,000,000	$ 6,000,000
2021 Acquisitions [Member]
Purchase price consideration transferred			68,000,000
Cash paid at closing			51,000,000
Net revenues from acquisition			9,000,000
Cash payment			4,000,000
Business combination accrued consideration			13,000,000
Goodwill, expected tax deduction			21,000,000
2021 Acquisitions [Member] | Maximum [Member]
Operating income (loss) from acquisition			1,000,000
2020 Acquisitions [Member]
Cash paid at closing					$ 329,000,000
Net of cash acquired and accrued consideration					5,000,000
Goodwill, expected tax deduction					20,000,000
2020 Acquisitions [Member] | Safety Services [Member]
Purchase price consideration transferred					324,000,000
Cash payment					319,000,000
Business combination accrued consideration					$ 5,000,000
2020 Acquisitions [Member] | Safety Services [Member] | Minimum [Member]
Business combination accrued consideration paid out period					1 year
APi Acquisition [Member]
Contingent compensation			13,000,000		$ 39,000,000
Maximum payout of contingent compensation			49,000,000		85,000,000
Payout of accrued contingent compensation			13,000,000		39,000,000
Liability for deferred payments			$ 13,000,000		$ 16,000,000
APi Acquisition [Member] | Minimum [Member]
Contingent compensation arrangements recognized period		3 years
Liability for deferred payments recognition period		12 months
APi Acquisition [Member] | Maximum [Member]
Contingent compensation arrangements recognized period		5 years
Liability for deferred payments recognition period		24 months
Chubb Limited Fire and Security Business [Member]
Purchase price consideration transferred	$ 3,100,000,000
Cash acquired	2,900,000,000
Assumed liabilities, and other adjustments	$ 200,000,000

Business Combinations - Summary

Business Combinations - Summary of Preliminary Fair Value of Consideration of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
2020 Acquisitions [Member]
Business Acquisition [Line Items]
Cash paid at closing		$ 329
Accrued consideration		5
Total consideration		334
Cash		10
Current assets		76
Property and equipment		12
Goodwill		215
Other noncurrent assets		14
Current liabilities		(54)
Noncurrent liabilities		(38)
Net assets acquired		334
2020 Acquisitions [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets other then goodwill		82
2020 Acquisitions [Member] | Trade names and Trademarks [Member]
Business Acquisition [Line Items]
Intangible assets other then goodwill		16
2020 Acquisitions [Member] | Contractual Backlog [Member]
Business Acquisition [Line Items]
Intangible assets other then goodwill		$ 1
Premier Fire [Member]
Business Acquisition [Line Items]
Cash paid at closing	$ 32
Accrued consideration	7
Total consideration	39
Cash	3
Current assets	10
Property and equipment	1
Intangible assets other then goodwill	13
Goodwill	17
Current liabilities	(5)
Noncurrent liabilities
Net assets acquired	39
Other 2021 Acquisitions [Member]
Business Acquisition [Line Items]
Cash paid at closing	23
Accrued consideration	6
Total consideration	29
Cash	1
Current assets	5
Property and equipment	2
Intangible assets other then goodwill	5
Goodwill	18
Current liabilities	(2)
Noncurrent liabilities
Net assets acquired	$ 29

Net Revenues - Summary of Disag

Net Revenues - Summary of Disaggregated Net Revenues (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,047	$ 958	$ 2,828	$ 2,705
United States [Member]
Disaggregation of Revenue [Line Items]
Net revenues	955	901	2,550	2,557
Canada and Europe [Member]
Disaggregation of Revenue [Line Items]
Net revenues	92	57	278	148
Safety Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	533	404	1,511	1,199
Safety Services [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net revenues	452	361	1,257	1,074
Safety Services [Member] | Canada and Europe [Member]
Disaggregation of Revenue [Line Items]
Net revenues	81	43	254	125
Specialty Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	436	400	1,172	1,049
Specialty Services [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net revenues	436	400	1,172	1,049
Industrial Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	103	158	196	468
Industrial Services [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net revenues	92	144	172	445
Industrial Services [Member] | Canada and Europe [Member]
Disaggregation of Revenue [Line Items]
Net revenues	11	14	24	23
Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net revenues	(25)	(4)	(51)	(11)
Corporate and Eliminations [Member] | United States [Member]
Disaggregation of Revenue [Line Items]
Net revenues	(25)	(4)	(51)	(11)
Life Safety [Member]
Disaggregation of Revenue [Line Items]
Net revenues	428	322	1,199	963
Life Safety [Member] | Safety Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	428	322	1,199	963
Heating, Ventilation and Air Conditioning ("HVAC") [Member]
Disaggregation of Revenue [Line Items]
Net revenues	105	82	312	236
Heating, Ventilation and Air Conditioning ("HVAC") [Member] | Safety Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	105	82	312	236
Infrastructure/Utility [Member]
Disaggregation of Revenue [Line Items]
Net revenues	220	230	561	615
Infrastructure/Utility [Member] | Specialty Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	220	230	561	615
Fabrication [Member]
Disaggregation of Revenue [Line Items]
Net revenues	45	58	186	129
Fabrication [Member] | Specialty Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	45	58	186	129
Specialty Contracting [Member]
Disaggregation of Revenue [Line Items]
Net revenues	171	112	425	305
Specialty Contracting [Member] | Specialty Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	171	112	425	305
Transmission [Member]
Disaggregation of Revenue [Line Items]
Net revenues	68	127	141	336
Transmission [Member] | Industrial Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	68	127	141	336
Civil [Member]
Disaggregation of Revenue [Line Items]
Net revenues	35	25	55	50
Civil [Member] | Industrial Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues	35	25	55	50
Inspection [Member]
Disaggregation of Revenue [Line Items]
Net revenues		6		82
Inspection [Member] | Industrial Services [Member]
Disaggregation of Revenue [Line Items]
Net revenues		6		82
Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net revenues	(25)	(4)	(51)	(11)
Corporate and Eliminations [Member] | Corporate and Eliminations [Member]
Disaggregation of Revenue [Line Items]
Net revenues	$ (25)	$ (4)	$ (51)	$ (11)

Net Revenues - Additional Infor

Net Revenues - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Aggregate amount of transaction price allocated to unsatisfied performance obligation	$ 998,000,000
Percentage of recognized revenue of remaining performance obligations over the next 12 months	90.00%
Customers with payment terms	30 days
Retentions receivable	$ 117,000,000	$ 122,000,000
Retentions receivable within one year	21,000,000	$ 26,000,000
Impairment of contract assets	$ 0
Minimum [Member]
Payment of invoices	30 days
Maximum [Member]
Payment of invoices	90 days

Net Revenues - Additional Inf_2

Net Revenues - Additional Information (Details1)	Sep. 30, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations period	12 months

Net Revenues - Summary of Accou

Net Revenues - Summary of Accounts Receivable, Net of Allowances, Contract Assets and Contract Liabilities from Contracts with Customer (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Revenues [Abstract]
Accounts receivable, net of allowances	$ 723	$ 639
Contract assets	224	142
Contract liabilities	$ 238	$ 219

Goodwill and Intangibles - Summ

Goodwill and Intangibles - Summary of Changes In Carrying Amounts of Goodwill By Reportable Segments (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Goodwill [LineItems]
Beginning Balance	$ 1,082
Acquisitions	35
Measurement period adjustments and other	(18)
Ending Balance	1,099
Safety Services [Member]
Goodwill [LineItems]
Beginning Balance	906
Acquisitions	30
Measurement period adjustments and other	(18)
Ending Balance	918
Specialty Services [Member]
Goodwill [LineItems]
Beginning Balance	172
Acquisitions	5
Ending Balance	177
Industrial Services [Member]
Goodwill [LineItems]
Beginning Balance	4
Ending Balance	$ 4

Goodwill and Intangibles - Addi

Goodwill and Intangibles - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Goodwill [LineItems]
Goodwill, impairment loss				$ 193
Amortization expense	$ 32	$ 31	$ 95	134
APi Acquisition [Member]
Goodwill [LineItems]
Goodwill impairment charges				193
Adjustment of cumulative amortization expense reversed		15		5
Amortization expense		$ 46		139
Safety Services [Member]
Goodwill [LineItems]
Goodwill, impairment loss				83
Specialty Services [Member]
Goodwill [LineItems]
Goodwill, impairment loss				52
Industrial Services [Member]
Goodwill [LineItems]
Goodwill, impairment loss				$ 58

Goodwill and Intangibles - Su_2

Goodwill and Intangibles - Summary of Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,224	$ 1,198
Accumulated Amortization	(327)	(233)
Net Carrying Amount	$ 897	$ 965
Contractual Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Lives (in Years)	1 year	1 year 7 months 6 days
Gross Carrying Amount	$ 101	$ 101
Accumulated Amortization	(96)	(92)
Net Carrying Amount	$ 5	$ 9
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Lives (in Years)	6 years 7 months 6 days	7 years
Gross Carrying Amount	$ 845	$ 823
Accumulated Amortization	(195)	(119)
Net Carrying Amount	$ 650	$ 704
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Lives (in Years)	13 years	13 years 9 months 18 days
Gross Carrying Amount	$ 278	$ 274
Accumulated Amortization	(36)	(22)
Net Carrying Amount	$ 242	$ 252

Goodwill and Intangibles - Su_3

Goodwill and Intangibles - Summary of Amortization Expense Recognized on Identifiable Intangible Assets (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items]
Total intangible asset amortization expense	$ 32	$ 31	$ 95	$ 134
Cost of Revenues [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangible asset amortization expense	2	6	5	51
Selling, General and Administrative Expenses [Member]
Finite-Lived Intangible Assets [Line Items]
Total intangible asset amortization expense	$ 30	$ 25	$ 90	$ 83

Fair Value of Financial Instr_3

Fair Value of Financial Instruments - Summary of Fair Value Measurement Assets and Liabilities Measured on Recurring Basis (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	$ (17)
Derivatives Not Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total		$ (51)
Foreign currency contracts		(9)
Net Investment Hedges [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	6
Interest Rate Swaps [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	(22)	(35)
Cross Currency Swaps [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	3
Cross Currency Swaps [Member] | Net Investment Hedges [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	(6)
Contingent Consideration Obligations [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligations	(4)
Contingent Consideration Obligations [Member] | Derivatives Not Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligations		(7)
Fair Value, Inputs, Level 2 [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	(13)
Fair Value, Inputs, Level 2 [Member] | Derivatives Not Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total		(44)
Foreign currency contracts		(9)
Fair Value, Inputs, Level 2 [Member] | Net Investment Hedges [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	6
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swaps [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative liability	(22)	(35)
Fair Value, Inputs, Level 2 [Member] | Cross Currency Swaps [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset	3
Fair Value, Inputs, Level 3 [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	(4)
Fair Value, Inputs, Level 3 [Member] | Derivatives Not Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total		(7)
Fair Value, Inputs, Level 3 [Member] | Contingent Consideration Obligations [Member] | Derivatives Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligations	$ (4)
Fair Value, Inputs, Level 3 [Member] | Contingent Consideration Obligations [Member] | Derivatives Not Designated as Hedge Instruments [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration obligations		$ (7)

Fair Value of Financial Instr_4

Fair Value of Financial Instruments - Summary of Reconciliation of Fair Value of Contingent Consideration Obligations (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)Arrangement
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Balances at beginning of period	$ 7
Issuances	3
Settlements	(6)
Adjustments to fair value
Balance at end of period	$ 4
Number of open contingent consideration arrangements at the end of period | Arrangement	4
Maximum potential payout at end of period	$ 5

Fair Value of Financial Instr_5

Fair Value of Financial Instruments - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021
Senior Notes [Member] | Non-Variable Interest Rate Debt [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Line of credit facility, interest rate	4.125%

Fair Value of Financial Instr_6

Fair Value of Financial Instruments - Summary of Carrying And Fair Value Of Non-Variable Interest Rate Debt (Detail) - Senior Notes [Member] - Fair Value, Inputs, Level 2 [Member] - Non-Variable Interest Rate Debt [Member] $ in Millions	Sep. 30, 2021USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-Variable Interest Rate Debt, Carrying Value	$ 350
Non-Variable Interest Rate Debt, Fair Value	$ 343

Fair Value of Financial Instr_7

Fair Value of Financial Instruments - Summary of Carrying And Fair Value Of Non-Variable Interest Rate Debt (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2021
Senior Notes [Member] | Non-Variable Interest Rate Debt [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Line of credit facility, interest rate	4.125%

Derivatives - Additional Inform

Derivatives - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2021	Dec. 31, 2020
Foreign Currency Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount	$ 0		$ 0
Derivative liability						$ 9,000,000
Other (income) expense, net	$ 0	$ 0	1,000,000	$ 0
Foreign Currency Contracts [Member] | Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative asset						1,000,000
Designated as Hedging Instrument [Member] | Net Investment Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Annual reduction in interest expense			$ 3,000,000
Reduction in overall effective interest rate	0.24%		0.24%
Derivative asset	$ 6,000,000		$ 6,000,000
Designated as Hedging Instrument [Member] | Interest Rate Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Debt instrument term			5 years
Derivative notional amount	$ 720,000,000		$ 720,000,000
Derivative, fixed interest rate	1.62%		1.62%
Derivative liability	$ 22,000,000		$ 22,000,000			$ 35,000,000
Designated as Hedging Instrument [Member] | Foreign Currency Swap [Member] | Maximum [Member] | Net Investment Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Investment hedge, Amount amortized from AOCI into interest expenses	1,000,000		1,000,000
Designated as Hedging Instrument [Member] | Cross Currency Swaps [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount					$ 120,000,000
Derivative asset	3,000,000		3,000,000
Designated as Hedging Instrument [Member] | Cross Currency Swaps [Member] | Net Investment Hedge [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative notional amount					$ 230,000,000
Derivative liability	6,000,000		6,000,000
Unrealized gains on AOCI before taxes			5,000,000
Designated as Hedging Instrument [Member] | Cross Currency Swaps [Member] | Maximum [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative liability	$ 3,000,000		$ 3,000,000

Property and Equipment, Net - S

Property and Equipment, Net - Summary of Components of Property and Equipment (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total cost	$ 486	$ 449
Accumulated depreciation	(149)	(94)
Property and equipment, net	337	355
Land [Member]
Property, Plant and Equipment [Line Items]
Total cost	26	26
Building [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 77	76
Property, Plant and Equipment, Useful Life	39 years
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 234	217
Machinery and Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	20 years
Machinery and Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	2 years
Autos and Trucks [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 108	92
Autos and Trucks [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Autos and Trucks [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Office Equipment [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 25	24
Office Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Office Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total cost	$ 16	$ 14
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	15 years
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	1 year

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Property, Plant and Equipment [Line Items]
Depreciation	$ 20	$ 21	$ 59	$ 62
APi Acquisition [Member]
Property, Plant and Equipment [Line Items]
Depreciation				60
Changes in depreciation expense, if fair value known at business acquisition amount				$ 2

Debt - Summary of Debt Obligati

Debt - Summary of Debt Obligations (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Total debt obligations	$ 1,491	$ 1,443
Less: unamortized deferred financing costs	(21)	(28)
Total debt, net of deferred financing costs	1,470	1,415
Less: short-term and current portion of long-term debt	(1)	(18)
Long-term debt	1,469	1,397
2019 Term Loan [Member]
Line of Credit Facility [Line Items]
Total debt obligations	$ 1,140
Term Loan Facility [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maturity Date	Oct. 1, 2024
Total debt obligations	$ 0	0
Term Loan Facility [Member] | 2019 Term Loan [Member]
Line of Credit Facility [Line Items]
Maturity Date	Oct. 1, 2026
Total debt obligations	$ 1,140	1,188
Term Loan Facility [Member] | 2020 Term Loan [Member]
Line of Credit Facility [Line Items]
Maturity Date	Oct. 1, 2026
Total debt obligations		250
Senior Notes [Member]
Line of Credit Facility [Line Items]
Maturity Date	Jul. 15, 2029
Total debt obligations	$ 350
Other Obligations [Member]
Line of Credit Facility [Line Items]
Total debt obligations	$ 1	$ 5

Debt - Summary of Debt Obliga_2

Debt - Summary of Debt Obligations (Parenthetical) (Detail)	9 Months Ended
	Sep. 30, 2021
Senior Notes [Member]
Line Of Credit Facility [Line Items]
Line of credit facility, interest rate	4.125%

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Short-term Debt [Line Items]
Line of credit outstanding		$ 1,491		$ 1,443
Loss on extinguishment of debt		9
Acquisition of Construction Equipment and Vehicles [Member]
Short-term Debt [Line Items]
Notes payable		1		5
2019 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit outstanding		$ 1,140
Line of credit facility, interest rate		2.58%
Remaining line of credit outstanding (unswapped portion)		$ 420
Line of credit facility, interest rate description		one-month LIBOR plus 250 basis points
Senior Notes [Member]
Short-term Debt [Line Items]
Line of credit outstanding		$ 350
Line of credit facility, interest rate		4.125%
Senior Notes [Member] | APi Group DE, Inc [Member]
Short-term Debt [Line Items]
Line of credit outstanding	$ 350
Line of credit facility, interest rate	4.125%
Term Loan Facility [Member] | 2020 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit outstanding				250
Repayment of debt	$ 250
Term Loan Facility [Member] | 2019 Term Loan [Member]
Short-term Debt [Line Items]
Line of credit outstanding		$ 1,140		1,188
Term Loan Facility [Member] | 2019 Term Loan [Member] | Interest Rate Swaps [Member]
Short-term Debt [Line Items]
Derivative, fixed interest rate		4.12%
Term Loan Facility [Member] | 2019 Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Swaps [Member]
Short-term Debt [Line Items]
Debt instrument term		5 years
Derivative notional amount		$ 720
Derivative, fixed interest rate		1.62%
Term Loan Facility [Member] | Revolving Credit Facility [Member]
Short-term Debt [Line Items]
Line of credit outstanding		$ 0		0
Debt instrument term		5 years
Secured term loan		$ 300
Line of credit net letters of credit outstanding		226		230
Letters of credit outstanding		$ 74		$ 70
Term Loan Facility [Member] | Revolving Credit Facility [Member] | Base Rate [Member]
Short-term Debt [Line Items]
Debt, variable interest rate		1.25%
Term Loan Facility [Member] | Revolving Credit Facility [Member] | Eurodollar [Member]
Short-term Debt [Line Items]
Debt, variable interest rate		2.25%
Term Loan Facility [Member] | 2020 and 2019 Term Loan [Member]
Short-term Debt [Line Items]
Loss on extinguishment of debt	$ 9

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	Dec. 27, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Effective tax rate		38.50%	50.10%	31.30%	21.20%
U.S. Federal income tax rate		21.00%	21.00%	21.00%	21.00%
Deferred tax assets, valuation allowance		$ 4,000,000		$ 4,000,000
Operating loss carryforwards limitations				The foreign net operating losses generally have carryback periods of three years, carryforward periods of twenty years, or are indefinite, and begin to expire in 2034.
Unrecognized tax benefits		3,000,000		$ 3,000,000		$ 2,000,000
Income tax penalties and interest accrued		1,000,000		1,000,000		$ 1,000,000
Income tax interest expense				0	$ 0
Unrecognized tax benefits that would impact effective tax rate		2,000,000		2,000,000
Effective income tax rate reconciliation, unrecognized tax benefits				1,000,000
Tax adjustment				1,000,000
Provision for percent deduction for business meal expenses purchased	100.00%
Domestic Tax Authority [Member]
Operating loss carryforwards		0		0
State and Local Jurisdiction [Member]
Operating loss carryforwards		15,000,000		$ 15,000,000
Operating loss carryforwards limitations				The state net operating losses have carryforward periods of five to twenty years and begin to expire in 2024.
Operating loss carryforwards expiration year				2024
State and Local Jurisdiction [Member] | Minimum [Member]
Operating loss carryforwards, carryforward term				5 years
State and Local Jurisdiction [Member] | Maximum [Member]
Operating loss carryforwards, carryforward term				20 years
Foreign Tax Authority [Member]
Operating loss carryforwards		$ 9,000,000		$ 9,000,000
Operating loss carryforwards, carryforward term				20 years
Operating loss carryforwards expiration year				2034
Operating loss carryback term				3 years

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Multiemployer Plans [Line Items]
Number of common stock issued related to ESPP	411,320		411,320
ESPP [Member]
Multiemployer Plans [Line Items]
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent			85.00%
Maximum number of shares purchased in offering period			500
Maximum value of common stock purchased during period under ESPP			$ 10,000,000,000
Expense related to ESPP	$ 1,000,000		3,000,000
Multiemployer Pension And Other Multiemployer Benefit Plans And Trusts [Member]
Multiemployer Plans [Line Items]
Multiemployer Plan Contributions	26,000,000	$ 25,000,000	69,000,000	$ 71,000,000
Profit Sharing Plan [Member]
Multiemployer Plans [Line Items]
Expense recognized	$ 4,000,000		$ 11,000,000	$ 6,000,000
Profit Sharing Plan [Member] | Maximum [Member]
Multiemployer Plans [Line Items]
Expense recognized		$ 1,000,000

Related-Party Transactions - Ad

Related-Party Transactions - Additional Information (Detail) - USD ($) $ in Millions	Jul. 26, 2021	Jan. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Related Party Transaction [Line Items]
Dividends declared in common shares							12,000,000
Royal Oak Enterprises [Member]
Related Party Transaction [Line Items]
Net revenues from related party					$ 5
Accounts receivable from related party			$ 2		$ 2
Series B Preferred Shares [Member]
Related Party Transaction [Line Items]
Number of shares sold	800,000
Aggregate purchase price	$ 800
Series B Preferred Shares [Member] | Viking Purchasers [Member]
Related Party Transaction [Line Items]
Number of shares sold					200,000
Aggregate purchase price					$ 200
Series B Preferred Shares [Member] | Viking Purchasers [Member] | Minimum [Member]
Related Party Transaction [Line Items]
Percentage of outstanding stock owned by related party under agreement					5.00%
Mariposa Acquisition I V L L C [Member]
Related Party Transaction [Line Items]
Advisory service fees payable			$ 1	$ 1	$ 3	$ 3
Preferred Stock [Member] | Mariposa Acquisition I V L L C [Member]
Related Party Transaction [Line Items]
Dividends declared in common shares		12,400,000

Shareholders' Equity - Addition

Shareholders' Equity - Additional Information (Details) $ / shares in Units, $ in Millions	Jul. 26, 2021USD ($)$ / sharesshares	Sep. 30, 2021USD ($)shares	Sep. 30, 2021shares	Dec. 31, 2020shares
Class of Stock [Line Items]
Preferred shares issued		4,000,000	4,000,000	4,000,000
Preferred shares outstanding		4,000,000	4,000,000	4,000,000
Common shares issued		224,000,000	224,000,000	168,000,000
Series A Preferred Shares [Member]
Class of Stock [Line Items]
Preferred shares issued		4,000,000	4,000,000
Preferred shares outstanding		4,000,000	4,000,000
Preferred shares conversion description			The Series A Preferred Shares will be automatically converted into shares of common stock on a one for one basis upon the last day of 2026.
Preferred shares convertible into common share, number of shares			1
Series B Preferred Shares [Member]
Class of Stock [Line Items]
Number of shares sold	800,000
Aggregate purchase price | $	$ 800
Percentage of annual dividend rate	5.50%
Liquidation preference per share | $ / shares	$ 24.60
Common Shares [Member]
Class of Stock [Line Items]
Common shares issued		22,716,049	22,716,049
Proceeds from issuance of common stock, net of related expenses | $		$ 446

Earnings (Loss) Per Share - Sum

Earnings (Loss) Per Share - Summary of Computation Earnings (Loss) Per Common Share Using Two Class Method (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Basic earnings (loss) per common share:
Net income (loss)	$ 19	$ 21	$ (8)	$ 27	$ 36	$ (194)	$ 32	$ (131)
Less income attributable to Series A Preferred Shares	(2)			(4)			(4)
Net income (loss) attributable to common shareholders - basic	$ 17			$ 23			$ 28	$ (131)
Weighted average shares outstanding - basic	204,851,780			169,387,541			199,472,387	169,501,289
Basic earnings (loss) per common share	$ 0.08			$ 0.14			$ 0.14	$ (0.77)
Diluted earnings (loss) per common share:
Net income (loss)	$ 19	$ 21	$ (8)	$ 27	$ 36	$ (194)	$ 32	$ (131)
Less income attributable to Series A Preferred Shares	(2)			(4)			(4)
Net income (loss) attributable to common shareholders - diluted	$ 17			$ 23			$ 28	$ (131)
Weighted average shares outstanding - basic	204,851,780			169,387,541			199,472,387	169,501,289
Dilutive securities:
RSUs, warrants and stock options	713,750			4,346,291			1,773,018
Shares issuable pursuant to the annual Series A Preferred Share dividend	3,821,671			8,299,338			3,547,120
Weighted average shares outstanding - diluted	209,387,201			182,033,170			204,792,525	169,501,289
Diluted earnings (loss) per common share	$ 0.08			$ 0.13			$ 0.14	$ (0.77)

Earnings (Loss) Per Share - S_2

Earnings (Loss) Per Share - Summary of Computation Earnings (Loss) Per Common Share Using Two Class Method (Parenthetical) (Detail) - $ / shares	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Series A Preferred Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Percentage of increase in weighted average market price per share			20.00%
Number of shares multiplied for annual dividend	141,194,638		141,194,638
Annual dividend calculated based on price appreciate over the initial offering price					$ 10
Annual dividend calculated based on price appreciate over the highest price previously used			$ 17.8829
Warrants To Purchase Ordinary Shares [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Conversion Ratio				3:1 basis
Conversion of Stock, New Issuance				21,265,359
Number of share issuable upon exercise of warrants				21,265,359
Employee Stock Option [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Calculation of Diluted Earnings Per Share				162,500
Warrant [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Calculation of Diluted Earnings Per Share				63,796,076
Series A Convertible Preferred Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Calculation of Diluted Earnings Per Share	4,000,000	4,000,000	4,000,000	4,000,000

Segment Information - Additiona

Segment Information - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021Segment
Segment Reporting [Abstract]
Number of operating segments	3
Number of reportable segments	3

Segment Information - Summary o

Segment Information - Summary of Reconciliation Operating Income to EBITDA (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues	$ 1,047	$ 958	$ 2,828	$ 2,705
EBITDA Reconciliation
Operating income (loss)	41	62	86	(145)
Plus:
Investment income and other, net	3	6	12	20
Loss on extinguishment of debt			(9)
Depreciation	20	21	59	62
Amortization	32	31	95	134
EBITDA	96	120	243	71
Total assets	4,783	3,826	4,783	3,826	$ 4,065
Capital expenditures	9	7	43	24
Safety Services [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues	533	404	1,511	1,199
EBITDA Reconciliation
Operating income (loss)	56	(24)	153	(12)
Plus:
Investment income and other, net		4	5	9
Depreciation	3	2	6	4
Amortization	16	35	49	83
EBITDA	75	17	213	84
Total assets	3,108	1,702	3,108	1,702
Capital expenditures	3		5	1
Specialty Services [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues	436	400	1,172	1,049
EBITDA Reconciliation
Operating income (loss)	31	105	60	(9)
Plus:
Investment income and other, net	3	5	5	13
Depreciation	11	11	32	35
Amortization	11	5	34	41
EBITDA	56	126	131	80
Total assets	1,284	1,105	1,284	1,105
Capital expenditures	4	5	25	14
Industrial Services [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues	103	158	196	468
EBITDA Reconciliation
Operating income (loss)		17	(23)	(37)
Plus:
Investment income and other, net	1		3
Depreciation	5	6	17	19
Amortization	3	(10)	9	7
EBITDA	9	13	6	(11)
Total assets	198	341	198	341
Capital expenditures	2	2	13	8
Corporate and Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues	(25)	(4)	(51)	(11)
EBITDA Reconciliation
Operating income (loss)	(46)	(36)	(104)	(87)
Plus:
Investment income and other, net	(1)	(3)	(1)	(2)
Loss on extinguishment of debt			(9)
Depreciation	1	2	4	4
Amortization	2	1	3	3
EBITDA	(44)	(36)	(107)	(82)
Total assets	193	$ 678	$ 193	678
Capital expenditures				$ 1

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended		9 Months Ended
	Nov. 30, 2021	Oct. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Line of credit outstanding			$ 1,491	$ 1,443
Senior Notes [Member]
Subsequent Event [Line Items]
Line of credit outstanding			$ 350
Line of credit facility, interest rate			4.125%
Subsequent Event [Member] | Safety Services [Member]
Subsequent Event [Line Items]
Purchase price	$ 34
Subsequent Event [Member] | Senior Notes [Member] | APi Escrow Corp. [Member]
Subsequent Event [Line Items]
Line of credit outstanding		$ 300
Line of credit facility, interest rate		4.75%