REVENUE - Disaggregation of Revenue - Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,884	$ 3,034	$ 5,836	$ 5,888
United States
Disaggregation of Revenue [Line Items]
Total revenue	2,671	2,774	5,423	5,379
Canada
Disaggregation of Revenue [Line Items]
Total revenue	134	140	263	268
Europe
Disaggregation of Revenue [Line Items]
Total revenue		55		119
Mexico
Disaggregation of Revenue [Line Items]
Total revenue	79	65	150	122
SCS
Disaggregation of Revenue [Line Items]
Total revenue	1,179	1,174	2,380	2,263
Operating Segments | FMS
Disaggregation of Revenue [Line Items]
Total revenue	1,459	1,621	2,962	3,150
Operating Segments | FMS | United States
Disaggregation of Revenue [Line Items]
Total revenue	1,381	1,485	2,807	2,872
Operating Segments | FMS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	78	81	155	159
Operating Segments | FMS | Europe
Disaggregation of Revenue [Line Items]
Total revenue		55		119
Operating Segments | FMS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Operating Segments | SCS
Disaggregation of Revenue [Line Items]
Total revenue	1,179	1,174	2,380	2,263
Operating Segments | SCS | United States
Disaggregation of Revenue [Line Items]
Total revenue	1,035	1,040	2,103	2,012
Operating Segments | SCS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	65	69	127	129
Operating Segments | SCS | Europe
Disaggregation of Revenue [Line Items]
Total revenue		0		0
Operating Segments | SCS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	79	65	150	122
Operating Segments | DTS
Disaggregation of Revenue [Line Items]
Total revenue	440	450	894	875
Operating Segments | DTS | United States
Disaggregation of Revenue [Line Items]
Total revenue	440	450	894	875
Operating Segments | DTS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Operating Segments | DTS | Europe
Disaggregation of Revenue [Line Items]
Total revenue		0		0
Operating Segments | DTS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	0	0	0	0
Eliminations
Disaggregation of Revenue [Line Items]
Total revenue	(194)	(211)	(400)	(400)
Eliminations | United States
Disaggregation of Revenue [Line Items]
Total revenue	(185)	(201)	(381)	(380)
Eliminations | Canada
Disaggregation of Revenue [Line Items]
Total revenue	(9)	(10)	(19)	(20)
Eliminations | Europe
Disaggregation of Revenue [Line Items]
Total revenue		0		0
Eliminations | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	$ 0	$ 0	$ 0	$ 0