v3.25.4
BORROWINGS - Narrative (Details)
3 Months Ended 12 Months Ended
Dec. 31, 2025
USD ($)
series
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
series
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Jun. 30, 2025
USD ($)
Debt Instrument [Line Items]            
Principal debt issued $ 10,024,000,000   $ 10,024,000,000 $ 9,036,000,000    
Interest expense, long-term debt     540,000,000 580,000,000 $ 616,000,000  
Guarantee obligation, carrying value 3,000,000   3,000,000 3,000,000    
Commercial contracts            
Debt Instrument [Line Items]            
Guarantor obligations, maximum exposure 1,149,000,000   1,149,000,000 784,000,000    
Equipment residual value obligation            
Debt Instrument [Line Items]            
Guarantor obligations, maximum exposure 22,000,000   22,000,000 25,000,000    
Senior notes            
Debt Instrument [Line Items]            
Debt, principal amount $ 9,500,000,000   $ 9,500,000,000      
Debt repurchase price, percentage 101.00%   101.00%      
Number of debt series | series 9   9      
Line of credit | Revolving credit facility            
Debt Instrument [Line Items]            
Line of credit outstanding $ 0   $ 0 0    
4.800% senior notes due January 15, 2031 | Senior notes            
Debt Instrument [Line Items]            
Debt, principal amount           $ 650,000,000
Stated interest rate 4.80%   4.80%     4.80%
Principal debt issued $ 650,000,000   $ 650,000,000 0    
5.500% senior notes due June 15, 2035 | Senior notes            
Debt Instrument [Line Items]            
Debt, principal amount           $ 850,000,000
Stated interest rate 5.50%   5.50%     5.50%
Principal debt issued $ 850,000,000   $ 850,000,000 0    
4.150% senior notes due December 15, 2028 | Senior notes            
Debt Instrument [Line Items]            
Debt, principal amount $ 600,000,000   $ 600,000,000      
Stated interest rate 4.15%   4.15%      
Principal debt issued $ 600,000,000   $ 600,000,000 0    
4.950% senior notes due December 15, 2035 | Senior notes            
Debt Instrument [Line Items]            
Debt, principal amount $ 650,000,000   $ 650,000,000      
Stated interest rate 4.95%   4.95%      
Principal debt issued $ 650,000,000   $ 650,000,000 0    
5.600% senior notes due November 15, 2025 | Senior notes            
Debt Instrument [Line Items]            
Stated interest rate 5.60%   5.60%      
Debt repayments $ 1,500,000,000          
Principal debt issued 0   $ 0 $ 1,500,000,000    
5-Year Revolving Credit Facility | Line of credit | Revolving credit facility            
Debt Instrument [Line Items]            
Debt, term   5 years 5 years 5 years    
Maximum borrowing capacity 3,000,000,000   $ 3,000,000,000      
364-Day Revolving Credit Facility | Line of credit | Revolving credit facility            
Debt Instrument [Line Items]            
Debt, term   364 days 364 days 364 days    
Maximum borrowing capacity 500,000,000   $ 500,000,000      
3-Year Delayed Draw Term Loan Facility | Line of credit | Unsecured debt            
Debt Instrument [Line Items]            
Debt, term     3 years      
Maximum borrowing capacity 750,000,000   $ 750,000,000      
Floating rate Term Loan Facility due January 2, 2026 | Line of credit            
Debt Instrument [Line Items]            
Debt repayments   $ 250,000,000        
Principal debt issued 500,000,000   $ 500,000,000 $ 750,000,000    
Floating rate Term Loan Facility due January 2, 2026 | Line of credit | Unsecured debt            
Debt Instrument [Line Items]            
Debt, term     3 years      
Maximum borrowing capacity $ 2,000,000,000   $ 2,000,000,000