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Debt - Letters of Credit & Surety Bonds (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Fair value of outstanding debt $ 16,273 $ 16,929
Surety Bond    
Debt Instrument [Line Items]    
Surety bonds outstanding 784  
Letter of Credit    
Debt Instrument [Line Items]    
Letters of credit outstanding $ 120  
Weighted average interest rate of outstanding borrowings 0.80%