v3.26.1
Financial and Other Derivative Instruments (Netting Offsets of Derivative Assets and Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) $ 1,001 $ 707
Gross Amounts Offset in the Consolidated Statements of Financial Position (726) (475)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 275 232
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (941) (597)
Gross Amounts Offset in the Consolidated Statements of Financial Position 733 445
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (208) (152)
Natural gas    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 293 372
Gross Amounts Offset in the Consolidated Statements of Financial Position (176) (235)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 117 137
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (313) (329)
Gross Amounts Offset in the Consolidated Statements of Financial Position 240 227
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (73) (102)
Electricity    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 608 275
Gross Amounts Offset in the Consolidated Statements of Financial Position (489) (194)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 119 81
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (578) (235)
Gross Amounts Offset in the Consolidated Statements of Financial Position 444 186
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position (134) (49)
Environmental & Other    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 85 57
Gross Amounts Offset in the Consolidated Statements of Financial Position (61) (46)
Net Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position 24 11
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (49) (32)
Gross Amounts Offset in the Consolidated Statements of Financial Position 49 32
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) 14 3
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 14 3
Foreign currency exchange contracts    
Derivative assets    
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
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)