Securitization - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended
	Mar. 31, 2023	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2023
Variable Interest Entity [Line Items]
Long-term debt, fair value		$ 7,568,621	$ 7,337,936
Variable Interest Entity, Primary Beneficiary | Texas | Extraordinary Gas Cost | Winter Storm Uri
Variable Interest Entity [Line Items]
Regulatory asset, authorized	$ 3,500,000
Variable Interest Entity, Primary Beneficiary | Texas | Extraordinary Gas Cost | Winter Storm Uri | Minimum
Variable Interest Entity [Line Items]
Regulatory asset, maturity period	12 years
Variable Interest Entity, Primary Beneficiary | Texas | Extraordinary Gas Cost | Winter Storm Uri | Maximum
Variable Interest Entity [Line Items]
Regulatory asset, maturity period	18 years
Securitized Utility Tariff Bonds | Senior Notes | Variable Interest Entity, Primary Beneficiary
Variable Interest Entity [Line Items]
Debt face amount				$ 95,000
Long-term debt		81,000	85,100
Long-term debt, fair value		$ 81,900	$ 87,800