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GOODWILL AND INTANGIBLE ASSETS - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2023
USD ($)
reportingUnit
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Intangible Assets Disclosure [Line Items]      
Number of reporting units | reportingUnit 3    
Trade names $ 612 $ 602  
Intangible assets, amortization expense $ 321 $ 291 $ 287
Freight Segment      
Intangible Assets Disclosure [Line Items]      
Number of reporting units | reportingUnit 2    
Trade Names      
Intangible Assets Disclosure [Line Items]      
Intangible asset impairment charge $ 14    
Useful life (in years) 5 years    
Order or Production Backlog      
Intangible Assets Disclosure [Line Items]      
Intangible assets, weighted average useful life (years) 9 years    
Customer Relationships      
Intangible Assets Disclosure [Line Items]      
Intangible assets, weighted average useful life (years) 15 years    
Technology-Based Intangible Assets      
Intangible Assets Disclosure [Line Items]      
Intangible assets, weighted average useful life (years) 7 years    
Valuation Technique, Discounted Cash Flow      
Intangible Assets Disclosure [Line Items]      
Goodwill impairment test, weight of approach 0.75    
Valuation, Market Approach      
Intangible Assets Disclosure [Line Items]      
Goodwill impairment test, weight of approach 0.25