REVENUE - Disaggregation of Revenue - Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,098	$ 2,952
United States
Disaggregation of Revenue [Line Items]
Total revenue	2,883	2,753
Canada
Disaggregation of Revenue [Line Items]
Total revenue	135	129
Mexico
Disaggregation of Revenue [Line Items]
Total revenue	80	70
SCS
Disaggregation of Revenue [Line Items]
Total revenue	1,302	1,201
Operating Segments | FMS
Disaggregation of Revenue [Line Items]
Total revenue	1,455	1,503
Operating Segments | FMS | United States
Disaggregation of Revenue [Line Items]
Total revenue	1,380	1,426
Operating Segments | FMS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	75	77
Operating Segments | FMS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | SCS
Disaggregation of Revenue [Line Items]
Total revenue	1,302	1,201
Operating Segments | SCS | United States
Disaggregation of Revenue [Line Items]
Total revenue	1,151	1,069
Operating Segments | SCS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	71	62
Operating Segments | SCS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	80	70
Operating Segments | DTS
Disaggregation of Revenue [Line Items]
Total revenue	563	454
Operating Segments | DTS | United States
Disaggregation of Revenue [Line Items]
Total revenue	563	454
Operating Segments | DTS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Operating Segments | DTS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	0	0
Eliminations
Disaggregation of Revenue [Line Items]
Total revenue	(222)	(206)
Eliminations | United States
Disaggregation of Revenue [Line Items]
Total revenue	(211)	(196)
Eliminations | Canada
Disaggregation of Revenue [Line Items]
Total revenue	(11)	(10)
Eliminations | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	$ 0	$ 0