NET REVENUES - Summary of Disaggregated Net Revenues (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Net revenues	$ 1,982	$ 1,719
Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	1,984	1,720
Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(2)	(1)
United States
Disaggregation of Revenue [Line Items]
Net revenues	1,291	1,079
United States | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	(2)	(1)
France
Disaggregation of Revenue [Line Items]
Net revenues	180	161
France | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Other
Disaggregation of Revenue [Line Items]
Net revenues	511	479
Other | Corporate and Eliminations
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Life Safety
Disaggregation of Revenue [Line Items]
Net revenues	1,415	1,267
Infrastructure and Utility
Disaggregation of Revenue [Line Items]
Net revenues	218	185
Fabrication and Distribution
Disaggregation of Revenue [Line Items]
Net revenues	82	70
Specialty Contracting
Disaggregation of Revenue [Line Items]
Net revenues	269	198
Corporate and Elimination
Disaggregation of Revenue [Line Items]
Net revenues	1,982	1,719
Safety Services | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	1,415	1,267
Safety Services | United States | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	724	627
Safety Services | France | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	180	161
Safety Services | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	511	479
Safety Services | Life Safety | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	1,415	1,267
Safety Services | Infrastructure and Utility | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Safety Services | Fabrication and Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Safety Services | Specialty Contracting | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Specialty Services | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	569	453
Specialty Services | United States | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	569	453
Specialty Services | France | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Specialty Services | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Specialty Services | Life Safety | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	0	0
Specialty Services | Infrastructure and Utility | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	218	185
Specialty Services | Fabrication and Distribution | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	82	70
Specialty Services | Specialty Contracting | Operating Segments
Disaggregation of Revenue [Line Items]
Net revenues	$ 269	$ 198