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SIGNIFICANT ACCOUNTING POLICIES AND BASIS OF PRESENTATION (Details)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
renewalOption
$ / shares
Dec. 31, 2024
USD ($)
$ / shares
Dec. 31, 2023
USD ($)
Significant Accounting Policies and Basis of Presentation [Line Items]      
Revenues $ 9,541 $ 9,758 $ 18,787
Lessee, operating lease, options to renew | renewalOption 1    
Pre-Revenue, Development-Stage And Early Phases Of Commercialization Companies      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Revenues $ 5    
Pre-Revenue Clinical-State Biotechnology Companies      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Revenues $ 15    
Class A      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Common stock, par value (in dollars per share) | $ / shares $ 1 $ 1  
Class B      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Common stock, par value (in dollars per share) | $ / shares $ 1 $ 1  
Minimum | Pre-Revenue, Development-Stage And Early Phases Of Commercialization Companies      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Revenues $ 5    
Minimum | Rail Equipment      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Useful Life (years) 40 years    
Minimum | Other Equipment      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Useful Life (years) 3 years    
Maximum | Pre-Revenue, Development-Stage And Early Phases Of Commercialization Companies      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Revenues $ 15    
Maximum | Rail Equipment      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Useful Life (years) 50 years    
Maximum | Other Equipment      
Significant Accounting Policies and Basis of Presentation [Line Items]      
Useful Life (years) 10 years