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Commitments and Contingencies Environmental Requirements - Water and Waste (Details) $ in Millions	Mar. 31, 2025 USD ($)
Site Contingency [Line Items]
Accrued liability of sites under investigation as part of federal CCR program	$ 45
Legacy CCR Investigation and Remediation Costs	15
Cost of Coal Ash Removal Projects	100
Federal Clean Water Act Section 316 (b) | Capital Addition Purchase Commitments
Site Contingency [Line Items]
Liability for estimated cost to comply with entrainment regulation	$ 50

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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