v3.26.3
Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Segment Reporting [Line Items]        
Regulated Operating Revenue, Electric $ 1,282 $ 1,209 $ 3,242 $ 3,105
Revenues Including Intersegment Revenues 1,464 1,395 4,182 4,183
Net income 363 48 824 462
Regulated Operating Revenue, Gas 180 183 935 1,070
Electric fuel and purchased power 317 378 911 1,007
Cost of natural gas sold and transported 33 36 308 380
Operating and maintenance expenses 260 234 727 714
Utilities Operating Expense, Depreciation and Amortization 309 276 904 819
Other income, net 6 12 22 28
Interest and Debt Expense 117 95 334 274
Income tax expense (benefit) $ 18 (33) $ 25 (7)
Number Of Reportable Segments, Disclosed By Definition, Flag true   true  
Other Revenue | Xcel Energy        
Segment Reporting [Line Items]        
Total revenues $ 2 1 $ 4 4
Total revenues        
Segment Reporting [Line Items]        
Net income 349 43 815 449
Regulated Operating Revenue 1,462 [1] 1,392 [2] 4,177 [3] 4,175 [4]
Electric fuel and purchased power 317 378 911 1,007
Cost of natural gas sold and transported 33 36 308 380
Operating and maintenance expenses 256 231 716 703
Utilities Operating Expense, Depreciation and Amortization 306 273 896 812
Other income, net 61 373 183 565
Interest and Debt Expense 117 93 333 273
Income tax expense (benefit) 25 (32) 20 (6)
Total revenues 1,470 1,400 4,204 4,203
Intersegment Eliminations        
Segment Reporting [Line Items]        
Regulated Operating Revenue 2 3 5 8
All Other        
Segment Reporting [Line Items]        
Net income 14 5 9 13
All Other | Total revenues        
Segment Reporting [Line Items]        
Total revenues 8 8 27 28
Regulated Electric Segment        
Segment Reporting [Line Items]        
Revenues Including Intersegment Revenues 1,282 1,209 3,242 3,105
Regulated Electric Segment | Total revenues        
Segment Reporting [Line Items]        
Regulated Operating Revenue, Electric 1,282 [1] 1,209 [2] 3,242 [3] 3,105 [4]
Net income 364 65 741 338
Electric fuel and purchased power 317 378 911 1,007
Cost of natural gas sold and transported 0 0 0 0
Operating and maintenance expenses 185 162 506 492
Utilities Operating Expense, Depreciation and Amortization 226 200 661 596
Other income, net 53 352 137 488
Interest and Debt Expense 95 72 265 212
Income tax expense (benefit) 42 (20) 21 (28)
Regulated Electric Segment | Intersegment Eliminations        
Segment Reporting [Line Items]        
Regulated Operating Revenue, Electric 0 0 0 0
Regulated Natural Gas Segment        
Segment Reporting [Line Items]        
Revenues Including Intersegment Revenues 182 186 940 1,078
Regulated Natural Gas Segment | Total revenues        
Segment Reporting [Line Items]        
Net income (15) (22) 74 111
Regulated Operating Revenue, Gas 180 [1] 183 [2] 935 [3] 1,070 [4]
Electric fuel and purchased power 0 0 0 0
Cost of natural gas sold and transported 33 36 308 380
Operating and maintenance expenses 71 69 210 211
Utilities Operating Expense, Depreciation and Amortization 80 73 235 216
Other income, net 8 21 46 77
Interest and Debt Expense 22 21 68 61
Income tax expense (benefit) (17) (12) (1) 22
Regulated Natural Gas Segment | Intersegment Eliminations        
Segment Reporting [Line Items]        
Regulated Operating Revenue, Gas $ 2 $ 3 $ 5 $ 8
[1] Operating revenues include $2 million of other affiliate revenue.
[2] Operating revenues include $1 million of other affiliate revenue.
[3] Operating revenues include $4 million of other affiliate revenue.
[4] Operating revenues include $4 million of other affiliate revenue.