REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,341,030	$ 6,015,376	$ 13,374,556	$ 19,629,804
NAST
Disaggregation of Revenue [Line Items]
Total revenues	3,086,970	4,002,461	9,470,425	12,264,396
Global Forwarding
Disaggregation of Revenue [Line Items]
Total revenues	719,045	1,511,115	2,288,890	5,798,702
All Other and Corporate
Disaggregation of Revenue [Line Items]
Total revenues	535,015	501,800	1,615,241	1,566,706
Transportation and logistics services
Disaggregation of Revenue [Line Items]
Total revenues	4,029,407	5,724,364	12,442,199	18,718,357
Transportation and logistics services | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	4,029,407	5,724,364	12,442,199	18,718,357
Transportation and logistics services | NAST | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	3,086,970	4,002,461	9,470,425	12,264,396
Transportation and logistics services | Global Forwarding | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	719,045	1,511,115	2,288,890	5,798,702
Transportation and logistics services | All Other and Corporate | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	223,392	210,788	682,884	655,259
Sourcing
Disaggregation of Revenue [Line Items]
Total revenues	311,623	291,012	932,357	911,447
Sourcing | Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	311,623	291,012	932,357	911,447
Sourcing | NAST | Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Sourcing | Global Forwarding | Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Sourcing | All Other and Corporate | Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	$ 311,623	$ 291,012	$ 932,357	$ 911,447