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Derivatives - Narrative (Details) $ in Millions | Jun. 30, 2026 USD ($)
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Interest rate swaps |
Derivative [Line Items] |
Fair value of credit-risk derivative, net liability | $ 35
Natural gas supply contracts |
Derivative [Line Items] |
Fair value of credit-risk derivative, net liability | 102
Natural gas supply contracts | Letter of Credit |
Derivative [Line Items] |
Collateral posted | $ 55

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