v3.25.2
Financial and Other Derivative Instruments (Netting Offsets of Derivative Assets and Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) $ 711 $ 694
Gross Amounts Offset in the Consolidated Statements of Financial Position (527) (447)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 184 247
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (627) (605)
Gross Amounts Offset in the Consolidated Statements of Financial Position 486 430
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (141) (175)
Natural gas    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 327 428
Gross Amounts Offset in the Consolidated Statements of Financial Position (249) (285)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 78 143
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (321) (410)
Gross Amounts Offset in the Consolidated Statements of Financial Position 225 272
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (96) (138)
Electricity    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 253 187
Gross Amounts Offset in the Consolidated Statements of Financial Position (179) (116)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 74 71
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (225) (150)
Gross Amounts Offset in the Consolidated Statements of Financial Position 182 114
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (43) (36)
Environmental & Other    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 129 58
Gross Amounts Offset in the Consolidated Statements of Financial Position (99) (46)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 30 12
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (79) (44)
Gross Amounts Offset in the Consolidated Statements of Financial Position 79 44
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 0 0
Interest rate contracts    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 2 20
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 2 20
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (1) 0
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (1) 0
Foreign currency exchange contracts    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 0 1
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 0 1
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (1) (1)
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position $ (1) $ (1)