v3.26.3
Segment and Related Information (Details)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Integer
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Income Statement Data [Abstract]          
Revenues $ 2,497 $ 2,239 $ 7,382 $ 6,768  
Fuel 246 231 715 657  
Energy purchases 486 422 1,592 1,369  
Depreciation 366 331 1,079 977  
Taxes, other than income 117 100 343 314  
Other Income (Expense) - net (22) (39) (104) (90)  
Interest Expense 234 210 690 599  
Income Taxes 86 80 250 229  
Net income (loss) 367 318 1,049 915  
Balance Sheet Data [Abstract]          
Total Assets 47,346   47,346   $ 45,244
Segment (Numeric) [Abstract]          
Goodwill 2,247   $ 2,247   2,247
Number of Reportable Segments | Integer     3    
Segment Reporting, Long-Lived Asset, Expenditure for Addition     $ 3,548 2,868  
Amortization     95 73  
Deferred income taxes and investment tax credits     207 177  
Defined benefit plans - non-service credits 6 8 18 23  
Total Segments          
Income Statement Data [Abstract]          
Revenues 2,496 2,239 7,382 6,768  
Fuel 246 231 715 657  
Energy purchases 486 420 1,593 1,369  
Utilities Operating Expense, Maintenance and Operations 612 557 1,752 1,692  
Depreciation 364 330 1,073 973  
Taxes, other than income 117 102 342 315  
Other Income (Expense) - net 20 33 (88) (76)  
Interest Expense 174 163 513 458  
Income Taxes 110 100 307 291  
Net income (loss) 417 371 1,180 1,096  
Segment (Numeric) [Abstract]          
Segment Reporting, Long-Lived Asset, Expenditure for Addition     3,490 2,864  
Amortization     82 63  
Deferred income taxes and investment tax credits     138 122  
Total Segments | Related Party          
Income Statement Data [Abstract]          
Interest Expense     7    
Segment (Numeric) [Abstract]          
Interest Income from affiliate 10 2 (12) (7)  
Rhode Island Regulated          
Income Statement Data [Abstract]          
Revenues 530 509 1,605 1,629  
Fuel   0 0 0  
Energy purchases 191 173 602 598  
Utilities Operating Expense, Maintenance and Operations 209 196 594 610  
Depreciation 51 45 148 131  
Taxes, other than income 46 38 132 127  
Other Income (Expense) - net (10) 2 (8) 5  
Interest Expense 29 28 85 78  
Income Taxes (3) 4 2 13  
Net income (loss) 2 27 48 80  
Balance Sheet Data [Abstract]          
Total Assets 8,122   8,122   7,510
Segment (Numeric) [Abstract]          
Segment Reporting, Long-Lived Asset, Expenditure for Addition     626 539  
Amortization     2 1  
Deferred income taxes and investment tax credits     62 38  
Rhode Island Regulated | Related Party          
Income Statement Data [Abstract]          
Interest Expense     7    
Segment (Numeric) [Abstract]          
Interest Income from affiliate 5 0 (5) 3  
Pennsylvania Regulated [Member]          
Income Statement Data [Abstract]          
Revenues 918 786 2,633 2,298  
Fuel   0 0 0  
Energy purchases 274 224 818 622  
Utilities Operating Expense, Maintenance and Operations 188 160 536 481  
Depreciation 112 105 330 307  
Taxes, other than income 42 38 126 111  
Other Income (Expense) - net 13 14 (39) 36  
Interest Expense 73 67 213 189  
Income Taxes 56 49 149 146  
Net income (loss) 191 159 507 482  
Balance Sheet Data [Abstract]          
Total Assets 18,182   18,182   16,886
Segment (Numeric) [Abstract]          
Segment Reporting, Long-Lived Asset, Expenditure for Addition     1,314 1,082  
Amortization     40 34  
Deferred income taxes and investment tax credits     71 63  
Pennsylvania Regulated [Member] | Related Party          
Income Statement Data [Abstract]          
Interest Expense     0    
Segment (Numeric) [Abstract]          
Interest Income from affiliate 5 2 (7) 4  
Kentucky Regulated [Member]          
Income Statement Data [Abstract]          
Revenues 1,048 944 3,144 2,841  
Fuel 246 231 715 657  
Energy purchases 21 23 173 149  
Utilities Operating Expense, Maintenance and Operations 215 201 622 601  
Depreciation 201 180 595 535  
Taxes, other than income 29 26 84 77  
Other Income (Expense) - net 17 17 (41) 35  
Interest Expense 72 68 215 191  
Income Taxes 57 47 156 132  
Net income (loss) 224 185 625 534  
Balance Sheet Data [Abstract]          
Total Assets 20,019   20,019   19,060
Segment (Numeric) [Abstract]          
Segment Reporting, Long-Lived Asset, Expenditure for Addition     1,550 1,243  
Amortization     40 28  
Deferred income taxes and investment tax credits     5 21  
Kentucky Regulated [Member] | Related Party          
Income Statement Data [Abstract]          
Interest Expense     0    
Segment (Numeric) [Abstract]          
Interest Income from affiliate 0 0 0 0  
Corporate and Other [Member]          
Income Statement Data [Abstract]          
Revenues 1 0 0 0  
Income Taxes (23) (22) (56) (63)  
Net income (loss) (50) (53) (131) (181)  
Balance Sheet Data [Abstract]          
Total Assets 1,023   1,023   1,788
Segment (Numeric) [Abstract]          
Segment Reporting, Long-Lived Asset, Expenditure for Addition     58 4  
Amortization     13 10  
Deferred income taxes and investment tax credits     69 55  
PPL Electric Utilities Corp [Member]          
Income Statement Data [Abstract]          
Revenues 918 786 2,633 2,298  
Energy purchases 274 224 818 622  
Depreciation 112 105 330 307  
Taxes, other than income 42 38 126 111  
Other Income (Expense) - net (13) (14) (39) (36)  
Interest Expense 73 67 213 189  
Income Taxes 56 49 149 146  
Net income (loss) [1] 191 159 507 482  
Balance Sheet Data [Abstract]          
Total Assets 18,182   $ 18,182   16,886
Segment (Numeric) [Abstract]          
Number of Reportable Segments | Integer     1    
Number of Operating Segments | Integer     2    
Amortization     $ 40 34  
Deferred income taxes and investment tax credits     71 63  
Defined benefit plans - non-service credits 1 4 4 11  
PPL Electric Utilities Corp [Member] | Related Party          
Segment (Numeric) [Abstract]          
Interest Income from affiliate (5) (2) (7) (4)  
Louisville Gas And Electric Co [Member]          
Income Statement Data [Abstract]          
Revenues 470 427 1,465 1,310  
Fuel 96 97 263 254  
Energy purchases 16 17 155 128  
Depreciation 87 77 257 228  
Taxes, other than income 15 13 43 39  
Other Income (Expense) - net (7) (8) (19) (16)  
Interest Expense 33 30 97 83  
Income Taxes 26 21 75 61  
Net income (loss) 104 [2] 83 296 [2] 244 [2]  
Balance Sheet Data [Abstract]          
Total Assets 9,169   9,169   8,818
Segment (Numeric) [Abstract]          
Goodwill 389   $ 389   389
Number of Reportable Segments | Integer     1    
Number of Operating Segments | Integer     1    
Amortization     $ 16 17  
Defined benefit plans - non-service credits 0 0 (1) 1  
Kentucky Utilities Co [Member]          
Income Statement Data [Abstract]          
Revenues 590 530 1,720 1,566  
Fuel 151 135 452 404  
Energy purchases 5 6 18 20  
Depreciation 114 102 338 305  
Taxes, other than income 14 13 41 38  
Other Income (Expense) - net (10) (9) (23) (19)  
Interest Expense     121 108  
Income Taxes 31 28 86 78  
Net income (loss) [3] 122 109 345 312  
Balance Sheet Data [Abstract]          
Total Assets 11,327   11,327   10,758
Segment (Numeric) [Abstract]          
Goodwill 607   $ 607   $ 607
Number of Reportable Segments | Integer     1    
Number of Operating Segments | Integer     1    
Amortization     $ 23 13  
Deferred income taxes and investment tax credits     (1) 11  
Defined benefit plans - non-service credits $ 1 $ 1 $ 2 $ 4  
[1] Net income equals comprehensive income.
[2] Net income equals comprehensive income.
[3] Net income equals comprehensive income.