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Hedging Activities and Fair Value Measurements - Narrative (Details)
$ in Millions
1 Months Ended 12 Months Ended
May 31, 2025
USD ($)
derivativeInstrument
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Derivative [Line Items]        
Payments for (proceeds from) hedge, financing activities   $ (14) $ 33 $ (21)
Carrying amount of hedged asset   6 11  
Unrealized gain (loss) on commodity contracts   (16) 20 (33)
Carrying Value        
Derivative [Line Items]        
Fixed rate debt principal amount fair value   34,100 31,600  
Significant Other Observable Inputs (Level 2) | Fair Value        
Derivative [Line Items]        
Fixed rate debt principal amount fair value   32,200 28,900  
Derivatives not designated as hedging instruments:        
Derivative [Line Items]        
Gain (loss) recognized in income on derivative   $ 40    
Treasury lock | Cash flow hedge | Derivatives designated as hedging instruments:        
Derivative [Line Items]        
Number of transactions | derivativeInstrument 4      
Derivative, fixed interest rate 3.98%      
Derivative, notional amount $ 750   3,750 1,500
Payments for (proceeds from) hedge, financing activities $ (14)   $ 33 $ (21)
Derivative, gains, amortization period   7 years    
Interest Rate Derivative Instruments | Cash flow hedge        
Derivative [Line Items]        
Accumulated other comprehensive income related to interest rate derivative instruments expected to be reclassified to earnings in interest expense over the next twelve months   $ 7    
Commodity Derivative Instruments | Cash flow hedge        
Derivative [Line Items]        
Net accumulated other comprehensive income (loss) related to commodity derivative instruments expected to be reclassified to earnings over the next twelve months   163    
Accumulated other comprehensive income (loss) related to commodity derivative instruments expected to be reclassified to revenue over the next twelve months   169    
Accumulated other comprehensive income (loss) related to commodity derivative instruments expected to be reclassified to operating costs and expenses over the next twelve months   (6)    
Commodity Derivative Instruments | Derivatives not designated as hedging instruments:        
Derivative [Line Items]        
Realized gain (loss) on commodity contracts   52    
Unrealized gain (loss) on commodity contracts   (12)    
Value before application of CME Rule 814 | Fair Value, Recurring        
Derivative [Line Items]        
Price risk derivatives, at fair value, net   $ 207