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Letters of Credit (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Line of Credit Facility [Line Items]    
Amount outstanding at period end $ 35 $ 60
Long-term Debt, Current Maturities 0 (200)
Letter of Credit    
Line of Credit Facility [Line Items]    
Amount outstanding at period end $ 0 0
Letter of Credit    
Line of Credit Facility [Line Items]    
Line of Credit Facility, Expiration Period 1 year  
Credit Facilities    
Line of Credit Facility [Line Items]    
Long-term Line of Credit $ 0 $ 0