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v3.25.2

Borrowings and Other Financing Instruments Long-Term Borrowings (Details) - USD ($) shares in Thousands, $ in Millions | Jun. 30, 2025 | Nov. 30, 2024
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Series Due May 15, 2034 | Bonds [Member] | PSCo |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 400 |
Debt Instrument, Interest Rate, Stated Percentage | 5.35% |
Series due May 15, 2035 | Bonds [Member] | NSP-Minnesota |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 600 |
Debt Instrument, Interest Rate, Stated Percentage | 5.05% |
Series due May 15, 2035 | Bonds [Member] | SPS |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 500 |
Debt Instrument, Interest Rate, Stated Percentage | 5.30% |
Series Due May 15, 2055 | Bonds [Member] | PSCo |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 600 |
Debt Instrument, Interest Rate, Stated Percentage | 5.85% |
Series Due May 15, 2055 | Bonds [Member] | NSP-Minnesota |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 500 |
Debt Instrument, Interest Rate, Stated Percentage | 5.65% |
Series Due June 15, 2054 | Bonds [Member] | NSP-Wisconsin |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 250 |
Debt Instrument, Interest Rate, Stated Percentage | 5.65% |
Series Due March 21, 2028 | Bonds [Member] | XCEL ENERGY INC [Member] |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 350 |
Debt Instrument, Interest Rate, Stated Percentage | 4.75% |
Series Due April 15, 2035 | Bonds [Member] | XCEL ENERGY INC [Member] |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Debt Instrument, Face Amount | $ 750 |
Debt Instrument, Interest Rate, Stated Percentage | 5.60% |
Forward Equity Agreements |  |
Forward Contract Indexed to Issuer's Equity [Line Items] |  |
Common Stock, Shares to be Issued through forward Equity Agreement |  | 21,100

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