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Borrowings and Other Financing Instruments Forward Equity Agreement (Details) - USD ($) $ in Millions | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Proceeds from issuance of common stock | $ 151 | $ 11
Dividend Reinvestment Program |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Proceeds from issuance of common stock | $ 20 | $ 28

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Details
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