Segment Information - Summary of Reconciliation Operating Income to EBITDA (Detail) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jan. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues		$ 6,558	$ 3,940	$ 3,587
EBITDA Reconciliation
Operating income (loss)		162	136	(166)
Plus:
Investment income and other, net		9	12	34
Non-service pension benefit		42
(Gain) loss on extinguishment of debt, net		5	(9)
Depreciation		77	75	81
Amortization		227	127	182
EBITDA		522	341	131
Total assets		8,091	5,159	4,065
Capital expenditures		79	55	38
Safety Services [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues		4,575	2,080	1,639
EBITDA Reconciliation
Operating income (loss)		256	207	8
Plus:
Investment income and other, net		1	6	13
Non-service pension benefit		42
(Gain) loss on extinguishment of debt, net
Depreciation		26	8	6
Amortization		167	66	113
EBITDA		492	287	140
Total assets		6,029	2,170	2,134
Capital expenditures		25	6	2
Specialty Services [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues		2,030	1,907	1,960
EBITDA Reconciliation
Operating income (loss)		97	78	(56)
Plus:
Investment income and other, net		7	9	17
(Gain) loss on extinguishment of debt, net
Depreciation		46	61	71
Amortization		56	57	65
EBITDA		206	205	97
Total assets		1,281	1,299	1,270
Capital expenditures		49	48	34
Corporate and Eliminations [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net revenues	$ (47)	(47)	(47)	(12)
EBITDA Reconciliation
Operating income (loss)		(191)	(149)	(118)
Plus:
Investment income and other, net		1	(3)	4
(Gain) loss on extinguishment of debt, net		5	(9)
Depreciation		5	6	4
Amortization		4	4	4
EBITDA		(176)	(151)	(106)
Total assets		781	1,690	661
Capital expenditures		$ 5	$ 1	$ 2