REVENUE - Disaggregation of Revenue - Schedule of Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,924	$ 3,035	$ 8,760	$ 8,923
United States
Disaggregation of Revenue [Line Items]
Total revenue	2,704	2,813	8,128	8,192
Canada
Disaggregation of Revenue [Line Items]
Total revenue	137	131	400	399
Europe
Disaggregation of Revenue [Line Items]
Total revenue		23		142
Mexico
Disaggregation of Revenue [Line Items]
Total revenue	83	68	232	190
SCS
Disaggregation of Revenue [Line Items]
Total revenue	1,194	1,206	3,574	3,469
Operating Segments | FMS
Disaggregation of Revenue [Line Items]
Total revenue	1,487	1,582	4,449	4,732
Operating Segments | FMS | United States
Disaggregation of Revenue [Line Items]
Total revenue	1,407	1,479	4,214	4,351
Operating Segments | FMS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	80	80	235	239
Operating Segments | FMS | Europe
Disaggregation of Revenue [Line Items]
Total revenue		23		142
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	1,194	1,206	3,574	3,469
Operating Segments | SCS | United States
Disaggregation of Revenue [Line Items]
Total revenue	1,042	1,077	3,145	3,089
Operating Segments | SCS | Canada
Disaggregation of Revenue [Line Items]
Total revenue	69	61	197	190
Operating Segments | SCS | Europe
Disaggregation of Revenue [Line Items]
Total revenue		0		0
Operating Segments | SCS | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	83	68	232	190
Operating Segments | DTS
Disaggregation of Revenue [Line Items]
Total revenue	448	455	1,342	1,330
Operating Segments | DTS | United States
Disaggregation of Revenue [Line Items]
Total revenue	448	455	1,342	1,330
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	(205)	(208)	(605)	(608)
Eliminations | United States
Disaggregation of Revenue [Line Items]
Total revenue	(193)	(198)	(573)	(578)
Eliminations | Canada
Disaggregation of Revenue [Line Items]
Total revenue	(12)	(10)	(32)	(30)
Eliminations | Europe
Disaggregation of Revenue [Line Items]
Total revenue		0		0
Eliminations | Mexico
Disaggregation of Revenue [Line Items]
Total revenue	$ 0	$ 0	$ 0	$ 0