v3.26.1
Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Regulated Operating Revenue, Electric $ 982 $ 958 $ 1,960 $ 1,896
Revenues Including Intersegment Revenues 1,208 1,221 2,718 2,788
Net income 199 156 461 414
Regulated Operating Revenue, Gas 225 260 755 887
Electric fuel and purchased power 264 309 594 629
Cost of natural gas sold and transported 47 80 275 344
Operating and maintenance expenses 236 238 467 480
Utilities Operating Expense, Depreciation and Amortization 303 270 595 543
Other income, net 11 10 16 16
Interest and Debt Expense 111 89 217 179
Income tax expense $ (7) 0 $ 7 26
Number Of Reportable Segments, Disclosed By Definition, Flag true   true  
Other Revenue | Xcel Energy        
Segment Reporting [Line Items]        
Total revenues $ 1 1 $ 2 3
Total revenues        
Segment Reporting [Line Items]        
Net income 208 156 466 406
Regulated Operating Revenue 1,207 [1] 1,218 [2] 2,715 [3] 2,783 [4]
Electric fuel and purchased power 264 309 594 629
Cost of natural gas sold and transported 47 80 275 344
Operating and maintenance expenses 232 234 460 472
Utilities Operating Expense, Depreciation and Amortization 301 268 590 539
Other income, net 65 87 122 192
Interest and Debt Expense 110 90 216 180
Income tax expense (19) (3) (5) 26
Total revenues 1,215 1,226 2,734 2,803
Intersegment Eliminations        
Segment Reporting [Line Items]        
Regulated Operating Revenue 1 3 3 5
All Other        
Segment Reporting [Line Items]        
Net income (9)   (5) 8
All Other | Total revenues        
Segment Reporting [Line Items]        
Total revenues 8 8 19 20
Regulated Electric Segment        
Segment Reporting [Line Items]        
Revenues Including Intersegment Revenues 982 958 1,960 1,896
Regulated Electric Segment | Total revenues        
Segment Reporting [Line Items]        
Regulated Operating Revenue, Electric 982 [1] 958 [2] 1,960 [3] 1,896 [4]
Net income 207 152 377 273
Electric fuel and purchased power 264 309 594 629
Cost of natural gas sold and transported 0 0 0 0
Operating and maintenance expenses 166 165 321 330
Utilities Operating Expense, Depreciation and Amortization 223 196 435 396
Other income, net 49 66 84 136
Interest and Debt Expense 87 70 170 140
Income tax expense (14) 0 (21) (8)
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 226 263 758 892
Regulated Natural Gas Segment | Total revenues        
Segment Reporting [Line Items]        
Net income 1 4 89 133
Regulated Operating Revenue, Gas 225 [1] 260 [2] 755 [3] 887 [4]
Electric fuel and purchased power 0 0 0 0
Cost of natural gas sold and transported 47 80 275 344
Operating and maintenance expenses 66 69 139 142
Utilities Operating Expense, Depreciation and Amortization 78 72 155 143
Other income, net 16 21 38 56
Interest and Debt Expense 23 20 46 40
Income tax expense (5) (3) 16 34
Regulated Natural Gas Segment | Intersegment Eliminations        
Segment Reporting [Line Items]        
Regulated Operating Revenue, Gas $ 1 $ 3 $ 3 $ 5
[1] Operating revenues include $1 million of other affiliate revenue.
[2] Operating revenues include $1 million of other affiliate revenue.
[3] Operating revenues include $2 million of other affiliate revenue.
[4] Operating revenues include $3 million of other affiliate revenue.