v3.26.3
Borrowings and Other Financing Instruments Forward Equity Agreements (Details)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
shares
Sep. 30, 2026
USD ($)
$ / shares
shares
Forward Contract Indexed to Issuer's Equity [Line Items]    
2025 ATM Program Total Available Proceeds $ 4,000.0  
2026 ATM Program Total Available Proceeds $ 4,300.0  
Common Stock, Shares Issued through ATM cash transactions (in shares) | shares   0.5
Cash Proceeds at Settlement through ATM cash transactions   $ 38.0
Transaction Fees Paid through ATM cash transactions   $ 0.3
Common Shares (in shares) | shares   10.0
Transaction Fees Paid (millions of dollars)   $ 5.1
Cash Proceeds at Settlement (millions of dollars)   $ 781.0
2025 Forward Equity Agreements    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Common Shares (in shares) | shares   4.4
Transaction Fees Paid (millions of dollars)   $ 2.5
Cash Proceeds at Settlement (millions of dollars)   $ 330.0
Common Shares (in shares) | shares 7.8 [1] 7.8 [1]
Minimum Expected Proceeds (millions of dollars) $ 606.0 [2] $ 606.0 [2]
2025 Forward Equity Agreements | Minimum    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Forward Sale per Price | $ / shares   $ 71.73
2025 Forward Equity Agreements | Maximum    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Forward Sale per Price | $ / shares   $ 80.40
2025 Collared Forward Equity Agreements    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Common Shares (in shares) | shares 15.1 15.1
Minimum Expected Proceeds (millions of dollars) $ 1,044.0 [3] $ 1,044.0 [3]
2026 Forward Equity Agreement    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Common Shares (in shares) | shares 15.6 [1] 15.6 [1]
Minimum Expected Proceeds (millions of dollars) $ 1,258.0 [2] $ 1,258.0 [2]
2026 Collared Forward Equity Agreements    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Common Shares (in shares) | shares 40.9 40.9
Minimum Expected Proceeds (millions of dollars) $ 2,863.0 [3] $ 2,863.0 [3]
2026 Forward Equity Agreements    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Common Shares (in shares) | shares   5.6
Transaction Fees Paid (millions of dollars)   $ 2.6
Cash Proceeds at Settlement (millions of dollars)   $ 451.0
2026 Forward Equity Agreements | Minimum    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Forward Sale per Price | $ / shares   $ 81.08
2026 Forward Equity Agreements | Maximum    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Forward Sale per Price | $ / shares   $ 81.17
[1] Maturity date varies by agreement. Xcel Energy may settle the agreements at any time until final maturity.
[2] Actual cash proceeds will be impacted by the timing of settlement. Forward prices are based on the public offering price (net of underwriting fees), increased for the overnight bank funding rate, less a spread and less expected dividends on Xcel Energy’s common stock during the period the agreements are outstanding.
[3] Minimum expected proceeds reflect the floor price. Actual cash proceeds will be based on an average market price for Xcel Energy’s common stock during a period preceding settlement, subject to the cap price and floor price, which are derived from the public offerings.