REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,934,098	$ 4,136,543	$ 8,947,032	$ 8,183,283
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	4,489,873	3,716,027	8,101,926	7,359,335
Operating Segments \| NAST
Disaggregation of Revenue [Line Items]
Total revenues	3,593,269	2,918,227	6,540,592	5,786,647
Operating Segments \| Global Forwarding
Disaggregation of Revenue [Line Items]
Total revenues	896,604	797,800	1,561,334	1,572,688
All Other and Corporate
Disaggregation of Revenue [Line Items]
Total revenues	444,225	420,516	845,106	823,948
All Other and Corporate \| All Other and Corporate
Disaggregation of Revenue [Line Items]
Total revenues	444,225	420,516	845,106	823,948
Transportation and logistics services
Disaggregation of Revenue [Line Items]
Total revenues	4,524,773	3,746,660	8,168,484	7,468,575
Transportation and logistics services \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	4,524,773	3,746,660	8,168,484	7,468,575
Transportation and logistics services \| Operating Segments \| NAST \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	3,593,269	2,918,227	6,540,592	5,786,647
Transportation and logistics services \| Operating Segments \| Global Forwarding \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	896,604	797,800	1,561,334	1,572,688
Transportation and logistics services \| All Other and Corporate \| All Other and Corporate \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	34,900	30,633	66,558	109,240
Sourcing
Disaggregation of Revenue [Line Items]
Total revenues	409,325	389,883	778,548	714,708
Sourcing \| Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	409,325	389,883	778,548	714,708
Sourcing \| Operating Segments \| NAST \| Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Sourcing \| Operating Segments \| 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 \| All Other and Corporate \| Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	$ 409,325	$ 389,883	$ 778,548	$ 714,708