v3.26.1
Accounting for Derivative Instruments and Hedging Activities - Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid    
Cash collateral received in support of energy risk management activities $ (167) $ (260)
Derivative liabilities   (3,222)
Cash Collateral Posted 441 365
Total Derivative Contracts    
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid    
Gross Amounts of Recognized Assets / Liabilities 358 397
Derivative Instruments 0 0
Cash Collateral (Held) / Posted (19) (78)
Net Amount 339 319
Interest rate contracts    
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid    
Derivative assets 10  
Derivative Instruments 0  
Cash collateral received in support of energy risk management activities 0  
Net Amount 10  
Derivative liabilities   (4)
Derivative Instruments   0
Cash Collateral Posted   0
Net Amount   (4)
Foreign exchange    
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid    
Derivative assets 12 3
Derivative Instruments 0 (2)
Cash collateral received in support of energy risk management activities 0 0
Net Amount 12 1
Derivative liabilities   (3)
Derivative Instruments   2
Cash Collateral Posted   0
Net Amount   (1)
Gross Amounts of Recognized Assets / Liabilities   0
Derivative Instruments   0
Cash Collateral (Held) / Posted   0
Net Amount   0
Commodity contracts    
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid    
Derivative assets 4,783 3,754
Derivative Instruments (3,574) (2,724)
Cash collateral received in support of energy risk management activities (158) (215)
Net Amount 1,051 815
Derivative liabilities (4,176) (3,070)
Derivative Instruments 3,574 2,724
Cash Collateral Posted 139 137
Net Amount (463) (209)
Gross Amounts of Recognized Assets / Liabilities 607 684
Derivative Instruments 0 0
Cash Collateral (Held) / Posted (19) (78)
Net Amount 588 606
Consumer Financing Program    
Offsetting of Derivatives by Counterparty Master Agreement Level and Collateral Received or Paid    
Derivative liabilities (271) (283)
Derivative Instruments 0 0
Cash Collateral Posted 0 0
Net Amount $ (271) $ (283)