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Borrowings and Other Financing Instruments Term Loan (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Short-term Debt [Line Items]
Amount outstanding at period end	$ 136		$ 1,005
Proceeds from issuance of common stock	151	$ 11
Letter of Credit
Short-term Debt [Line Items]
Amount outstanding at period end	$ 39		$ 19

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

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