Borrowings and Other Financing Instruments Other Equity (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Dividend Reinvestment Program [Line Items]
Proceeds from Issuance of Common Stock	$ 1,117	$ 270	$ 322
DividendReinvestmentProgram [Member]
Dividend Reinvestment Program [Line Items]
Proceeds from Issuance of Common Stock	$ 67	$ 88

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration