NET REVENUES - Summary of Disaggregated Net Revenues (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Net revenues	$ 2,254	$ 1,990	$ 4,236	$ 3,709
Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	2,255	1,991	4,239	3,711
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(1)	(1)	(3)	(2)
United States
Disaggregation of Revenue [Line Items]
Net revenues	1,545	1,302	2,836	2,381
United States | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(1)	(1)	(3)	(2)
France
Disaggregation of Revenue [Line Items]
Net revenues	177	172	357	333
France | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Other
Disaggregation of Revenue [Line Items]
Net revenues	532	516	1,043	995
Other | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Life Safety
Disaggregation of Revenue [Line Items]
Net revenues	1,482	1,362	2,897	2,629
Infrastructure and Utility
Disaggregation of Revenue [Line Items]
Net revenues	299	256	517	441
Fabrication and Distribution
Disaggregation of Revenue [Line Items]
Net revenues	101	99	183	169
Specialty Contracting
Disaggregation of Revenue [Line Items]
Net revenues	373	274	642	472
Corporate and Elimination
Disaggregation of Revenue [Line Items]
Net revenues	2,254	1,990	4,236	3,709
Safety Services | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	1,482	1,362	2,897	2,629
Safety Services | United States | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	773	674	1,497	1,301
Safety Services | France | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	177	172	357	333
Safety Services | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	532	516	1,043	995
Safety Services | Life Safety | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	1,482	1,362	2,897	2,629
Safety Services | Infrastructure and Utility | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Safety Services | Fabrication and Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Safety Services | Specialty Contracting | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Specialty Services | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	773	629	1,342	1,082
Specialty Services | United States | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	773	629	1,342	1,082
Specialty Services | France | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Specialty Services | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Specialty Services | Life Safety | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0	0	0
Specialty Services | Infrastructure and Utility | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	299	256	517	441
Specialty Services | Fabrication and Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	101	99	183	169
Specialty Services | Specialty Contracting | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	$ 373	$ 274	$ 642	$ 472