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Borrowings and Other Financing Instruments Revolving Credit Facilities (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Nov. 30, 2024
--- | --- | --- | --- | ---
Line of Credit Facility [Line Items] |  |  |  |  |
Shares Issued, Price Per Share |  |  |  |  | $ 64.44
Forward Equity Agreements |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Common stock, initial shares in an agreement |  |  |  |  | 18,300
Common stock, additional shares in an agreement |  |  |  |  | 2,800
Period End Settlement Price, in Shares |  | 21,100 |  |  |
Period End Settlement Price, in Cash |  | $ 1,350,000 |  |  |
Period End Net Cash Settlement Price |  | 100,000 |  |  |
Period End Net Share Settlement Price |  | 1,500 |  |  |
Expected Settlement Price |  | 1,360,000 |  |  |
Revolving Credit Facility [Member] |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit Facility | [1] | 4,750,000 |  |  |
Outstanding | [2] | 862,000 |  |  |
Available |  | 3,888,000 |  |  |
Direct advances on the credit facility outstanding |  | 0 |  | $ 0 |
Revolving Credit Facility [Member] | PSCo |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit Facility | [1] | 1,200,000 | $ 700,000 |  |
Outstanding | [2] | 30,000 |  |  |
Available |  | 1,170,000 |  |  |
Revolving Credit Facility [Member] | NSP-Minnesota |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit Facility | [1] | 800,000 | 700,000 |  |
Outstanding | [2] | 12,000 |  |  |
Available |  | 788,000 |  |  |
Revolving Credit Facility [Member] | SPS |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit Facility | [1] | 600,000 | 500,000 |  |
Outstanding | [2] | 0 |  |  |
Available |  | 600,000 |  |  |
Revolving Credit Facility [Member] | NSP-Wisconsin |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit Facility | [1] | 150,000 |  |  |
Outstanding | [2] | 0 |  |  |
Available |  | 150,000 |  |  |
Revolving Credit Facility [Member] | Xcel Energy Inc. |  |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |  |
Credit Facility | [1] | 2,000,000 | $ 1,500,000 |  |
Outstanding | [2] | 820,000 |  |  |
Available |  | $ 1,180,000 |  |  |
[1] | Expires in December 2029.
[2] | Includes outstanding commercial paper and letters of credit.

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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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 Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(f)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 470 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481544/470-10-50-6 + Details
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