REVENUE - Disaggregation of Revenue by Geographical Market and Industry (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 12,636	$ 11,783	$ 12,011
United States
Disaggregation of Revenue [Line Items]
Revenues	11,773	10,932	11,073
Canada
Disaggregation of Revenue [Line Items]
Revenues	538	538	528
Europe
Disaggregation of Revenue [Line Items]
Revenues			150
Mexico
Disaggregation of Revenue [Line Items]
Revenues	325	313	260
SCS
Disaggregation of Revenue [Line Items]
Revenues	5,300	4,875	4,720
Operating Segments | FMS
Disaggregation of Revenue [Line Items]
Revenues	5,888	5,930	6,327
Operating Segments | FMS | United States
Disaggregation of Revenue [Line Items]
Revenues	5,585	5,616	5,858
Operating Segments | FMS | Canada
Disaggregation of Revenue [Line Items]
Revenues	303	314	319
Operating Segments | FMS | Europe
Disaggregation of Revenue [Line Items]
Revenues			150
Operating Segments | FMS | Mexico
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments | SCS
Disaggregation of Revenue [Line Items]
Revenues	5,300	4,875	4,720
Operating Segments | SCS | United States
Disaggregation of Revenue [Line Items]
Revenues	4,697	4,295	4,209
Operating Segments | SCS | Canada
Disaggregation of Revenue [Line Items]
Revenues	278	267	251
Operating Segments | SCS | Europe
Disaggregation of Revenue [Line Items]
Revenues			0
Operating Segments | SCS | Mexico
Disaggregation of Revenue [Line Items]
Revenues	325	313	260
Operating Segments | DTS
Disaggregation of Revenue [Line Items]
Revenues	2,446	1,785	1,786
Operating Segments | DTS | United States
Disaggregation of Revenue [Line Items]
Revenues	2,446	1,785	1,786
Operating Segments | DTS | Canada
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Operating Segments | DTS | Europe
Disaggregation of Revenue [Line Items]
Revenues			0
Operating Segments | DTS | Mexico
Disaggregation of Revenue [Line Items]
Revenues	0	0	0
Eliminations
Disaggregation of Revenue [Line Items]
Revenues	(998)	(807)	(822)
Eliminations | United States
Disaggregation of Revenue [Line Items]
Revenues	(955)	(764)	(780)
Eliminations | Canada
Disaggregation of Revenue [Line Items]
Revenues	(43)	(43)	(42)
Eliminations | Europe
Disaggregation of Revenue [Line Items]
Revenues			0
Eliminations | Mexico
Disaggregation of Revenue [Line Items]
Revenues	$ 0	$ 0	$ 0