Borrowings and Other Financing Instruments Equity through DRIP and Benefits Program (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Forward Contract Indexed to Issuer's Equity [Line Items]
Proceeds from issuance of common stock			$ 101	$ 75
Issuances of common stock	$ 101	$ 77	113	95
Dividend Reinvestment Program
Forward Contract Indexed to Issuer's Equity [Line Items]
Proceeds from issuance of common stock			$ 40	$ 61

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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