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Derivatives and Risk Management Activities - Broker Receivable/Payable (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Derivative assets and liabilities |  |
Initial margin | $ 9 | $ 16
Variation margin posted/(returned) | (6) | 15
Letters of credit | (81) | (90)
Net broker receivable | 3 | 22
Exchange Traded |  |
Derivative assets and liabilities |  |
Letters of credit | $ 0 | $ (9)

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