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Derivative Financial Instruments (Details 3) - USD ($)
Dec. 31, 2024
Dec. 31, 2023
Fair values of derivatives on consolidated balance sheets    
Cash collateral on deposit with derivative counterparties $ 0 $ 0
Aggregate fair value of the derivative instruments with credit risk related contingent features in a net liability position 0 34,000,000
Cash collateral on deposit with derivative counterparties 0 0
Derivatives not designated as cash flow hedges    
Fair values of derivatives on consolidated balance sheets    
Derivative assets 4,000,000 1,000,000
Derivative Liability (3,000,000) (35,000,000)
Cash collateral on deposit with derivative counterparties 0 0
Cash collateral on deposit with derivative counterparties 0 0
Derivatives not designated as cash flow hedges | Natural gas derivatives    
Fair values of derivatives on consolidated balance sheets    
Derivative assets 4,000,000 1,000,000
Derivative Liability $ 3,000,000 $ 35,000,000