REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 6,015,376	$ 6,263,695	$ 19,629,804	$ 16,600,290
NAST
Disaggregation of Revenue [Line Items]
Total revenues	4,002,461	3,814,988	12,264,396	10,611,892
Global Forwarding
Disaggregation of Revenue [Line Items]
Total revenues	1,511,115	1,978,901	5,798,702	4,585,734
All Other and Corporate
Disaggregation of Revenue [Line Items]
Total revenues	501,800	469,806	1,566,706	1,402,664
Transportation and logistics services
Disaggregation of Revenue [Line Items]
Total revenues	5,724,364	5,999,901	18,718,357	15,800,576
Transportation and logistics services | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	5,724,364	5,999,901	18,718,357	15,800,576
Transportation and logistics services | NAST | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	4,002,461	3,814,988	12,264,396	10,611,892
Transportation and logistics services | Global Forwarding | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	1,511,115	1,978,901	5,798,702	4,585,734
Transportation and logistics services | All Other and Corporate | Performance obligations completed over time
Disaggregation of Revenue [Line Items]
Total revenues	210,788	206,012	655,259	602,950
Sourcing
Disaggregation of Revenue [Line Items]
Total revenues	291,012	263,794	911,447	799,714
Sourcing | Performance obligations completed at a point in time
Disaggregation of Revenue [Line Items]
Total revenues	291,012	263,794	911,447	799,714
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	$ 291,012	$ 263,794	$ 911,447	$ 799,714