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Borrowings and Other Financing Instruments Equity through DRIP and Benefits Program (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Forward Contract Indexed to Issuer's Equity [Line Items]
Proceeds from issuance of common stock	$ 122	$ 8
Issuances of common stock	122	12
Dividend Reinvestment Program
Forward Contract Indexed to Issuer's Equity [Line Items]
Proceeds from issuance of common stock	$ 30	$ 17

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The cash inflow from the additional capital contribution to the entity.

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Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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