REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenues	$ 5,358,060	$ 4,136,846	$ 14,305,092	$ 12,320,129
Operating Segments
Disaggregation of Revenue [Line Items]
Total revenues	4,978,274	3,752,041	13,080,200	11,111,376
Operating Segments \| NAST
Disaggregation of Revenue [Line Items]
Total revenues	3,829,223	2,965,694	10,369,815	8,752,341
Operating Segments \| Global Forwarding
Disaggregation of Revenue [Line Items]
Total revenues	1,149,051	786,347	2,710,385	2,359,035
All Other and Corporate
Disaggregation of Revenue [Line Items]
Total revenues	379,786	384,805	1,224,892	1,208,753
All Other and Corporate \| All Other and Corporate
Disaggregation of Revenue [Line Items]
Total revenues	379,786	384,805	1,224,892	1,208,753
Transportation and logistics services
Disaggregation of Revenue [Line Items]
Total revenues	5,012,177	3,783,535	13,180,661	11,252,110
Transportation and logistics services \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	5,012,177	3,783,535	13,180,661	11,252,110
Transportation and logistics services \| Operating Segments \| NAST \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	3,829,223	2,965,694	10,369,815	8,752,341
Transportation and logistics services \| Operating Segments \| Global Forwarding \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	1,149,051	786,347	2,710,385	2,359,035
Transportation and logistics services \| All Other and Corporate \| All Other and Corporate \| Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	33,903	31,494	100,461	140,734
Sourcing
Disaggregation of Revenue [Line Items]
Total revenues	345,883	353,311	1,124,431	1,068,019
Sourcing \| Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	345,883	353,311	1,124,431	1,068,019
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	$ 345,883	$ 353,311	$ 1,124,431	$ 1,068,019