v3.26.1
DEBT AND FINANCING ARRANGEMENTS - Narrative (Details)
3 Months Ended
Mar. 31, 2026
EUR (€)
credit_agreement
aircraftLease
Mar. 31, 2026
USD ($)
credit_agreement
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]        
Face value of debt instrument   $ 24,628,000,000    
Finance lease obligations   $ 1,085,000,000   $ 781,000,000
Number of credit agreements | credit_agreement 2 2    
Number Of Aircraft Leases | aircraftLease 3      
Build-To-Suit Facility        
Debt Instrument [Line Items]        
Finance lease obligations   $ 164,000,000   132,000,000
Significant Other Observable Inputs (Level 2)        
Debt Instrument [Line Items]        
Long-term debt fair value   22,400,000,000   22,800,000,000
Property Lease Guarantee        
Debt Instrument [Line Items]        
Guarantee amount (up to)   1,800,000,000    
U.S. Commercial Paper Program | Commercial Paper        
Debt Instrument [Line Items]        
Commercial paper program, authorized to borrow   10,000,000,000.0    
Commercial paper   $ 0   0
Foreign Commercial Paper Program | Commercial Paper        
Debt Instrument [Line Items]        
Commercial paper program, authorized to borrow | € € 5,000,000,000.0      
Commercial paper | € € 0   € 0  
4.650% senior notes | Senior notes        
Debt Instrument [Line Items]        
Debt instrument, stated interest rate 4.65% 4.65%    
Long-term debt   $ 498,000,000   498,000,000
Face value of debt instrument   $ 500,000,000    
5.250% senior notes | Senior notes        
Debt Instrument [Line Items]        
Debt instrument, stated interest rate 5.25% 5.25%    
Long-term debt   $ 1,240,000,000   1,240,000,000
Face value of debt instrument   $ 1,250,000,000    
5.950% senior notes | Senior notes        
Debt Instrument [Line Items]        
Debt instrument, stated interest rate 5.95% 5.95%    
Long-term debt   $ 1,232,000,000   1,232,000,000
Face value of debt instrument   $ 1,250,000,000    
6.050% senior notes | Senior notes        
Debt Instrument [Line Items]        
Debt instrument, stated interest rate 6.05% 6.05%    
Long-term debt   $ 985,000,000   985,000,000
Face value of debt instrument   1,000,000,000    
Revolving Credit Facility Expiring In 2026        
Debt Instrument [Line Items]        
Revolving credit facilities   1,000,000,000.0    
Amounts outstanding   0   0
Revolving Credit Facility Expiring In 2026 | Aplicable Margin        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.70%      
Revolving Credit Facility Expiring In 2029        
Debt Instrument [Line Items]        
Revolving credit facilities   2,000,000,000.0    
Amounts outstanding   $ 0   $ 0
Revolving Credit Facility Expiring In 2029 | Secured Overnight Financing Rate (SOFR)        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.10%      
Revolving Credit Facility Expiring In 2029 | Aplicable Margin        
Debt Instrument [Line Items]        
Basis spread on variable rate 0.70%