v3.25.2
Segment and Related Information (Details)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Jun. 30, 2025
USD ($)
Integer
Jun. 30, 2024
USD ($)
Dec. 31, 2024
USD ($)
Income Statement Data [Abstract]          
Revenues $ 2,025 $ 1,881 $ 4,529 $ 4,185  
Fuel 192 181 426 390  
Energy purchases 388 275 947 795  
Depreciation 324 319 646 635  
Taxes, other than income 101 93 214 181  
Other Income (Expense) - net (23) (32) (51) (54)  
Interest Expense 199 182 389 361  
Income Taxes 47 50 149 131  
Net income (loss) 183 190 597 497  
Balance Sheet Data [Abstract]          
Total Assets 42,363   42,363   $ 41,069
Segment (Numeric) [Abstract]          
Goodwill 2,247   $ 2,247   2,247
Number of Reportable Segments | Integer     3    
Segment, Expenditure, Addition to Long-Lived Assets     $ 1,723 1,266  
Amortization     49 47  
Deferred income taxes and investment tax credits     104 114  
Total Segments          
Income Statement Data [Abstract]          
Revenues 2,024 1,881 4,528 4,184  
Fuel 192 181 426 390  
Energy purchases 389 275 949 795  
Utilities Operating Expense, Maintenance and Operations 573 529 1,135 1,068  
Depreciation 323 317 643 633  
Taxes, other than income 100 93 213 181  
Other Income (Expense) - net (17) (26) (43) (45)  
Interest Expense 151 145 294 291  
Income Taxes 66 81 191 192  
Net income (loss) 248 296 725 699  
Segment (Numeric) [Abstract]          
Segment, Expenditure, Addition to Long-Lived Assets     1,722 1,266  
Amortization     43 43  
Deferred income taxes and investment tax credits     77 97  
Total Segments | Related Party          
Segment (Numeric) [Abstract]          
Interest Income from affiliate (1) (10) (5) (20)  
Rhode Island Regulated          
Income Statement Data [Abstract]          
Revenues 494 389 1,120 938  
Fuel 0 0 0 0  
Energy purchases 190 100 425 329  
Utilities Operating Expense, Maintenance and Operations 214 180 414 336  
Depreciation 44 40 86 81  
Taxes, other than income 42 39 89 66  
Other Income (Expense) - net 4 (6) (3) (13)  
Interest Expense 27 23 50 47  
Income Taxes (9) 1 9 16  
Net income (loss) (17) 12 53 76  
Balance Sheet Data [Abstract]          
Total Assets 7,125   7,125   7,055
Segment (Numeric) [Abstract]          
Segment, Expenditure, Addition to Long-Lived Assets     336 241  
Amortization     0 0  
Deferred income taxes and investment tax credits     18 36  
Rhode Island Regulated | Related Party          
Segment (Numeric) [Abstract]          
Interest Income from affiliate (1) 0 (3) 0  
Pennsylvania Regulated [Member]          
Income Statement Data [Abstract]          
Revenues 693 673 1,512 1,443  
Fuel 0 0 0 0  
Energy purchases 169 153 398 367  
Utilities Operating Expense, Maintenance and Operations 159 154 321 335  
Depreciation 100 100 202 199  
Taxes, other than income 32 30 73 66  
Other Income (Expense) - net (11) (11) (22) (20)  
Interest Expense 62 61 122 123  
Income Taxes 43 46 97 94  
Net income (loss) 139 150 323 299  
Balance Sheet Data [Abstract]          
Total Assets 15,892   15,892   15,475
Segment (Numeric) [Abstract]          
Segment, Expenditure, Addition to Long-Lived Assets     697 519  
Amortization     21 25  
Deferred income taxes and investment tax credits     48 60  
Pennsylvania Regulated [Member] | Related Party          
Segment (Numeric) [Abstract]          
Interest Income from affiliate 0 (10) (2) (20)  
Kentucky Regulated [Member]          
Income Statement Data [Abstract]          
Revenues 837 819 1,896 1,803  
Fuel 192 181 426 390  
Energy purchases 30 22 126 99  
Utilities Operating Expense, Maintenance and Operations 200 195 400 397  
Depreciation 179 177 355 353  
Taxes, other than income 26 24 51 49  
Other Income (Expense) - net (10) (9) (18) (12)  
Interest Expense 62 61 122 121  
Income Taxes 32 34 85 82  
Net income (loss) 126 134 349 324  
Balance Sheet Data [Abstract]          
Total Assets 18,076   18,076   17,626
Segment (Numeric) [Abstract]          
Segment, Expenditure, Addition to Long-Lived Assets     689 506  
Amortization     22 18  
Deferred income taxes and investment tax credits     11 1  
Kentucky Regulated [Member] | Related Party          
Segment (Numeric) [Abstract]          
Interest Income from affiliate 0 0 0 0  
Corporate and Other [Member]          
Income Statement Data [Abstract]          
Revenues 1 0 1 1  
Income Taxes (19) (31) (42) (61)  
Net income (loss) (65) (106) (128) (202)  
Balance Sheet Data [Abstract]          
Total Assets 1,270   1,270   913
Segment (Numeric) [Abstract]          
Segment, Expenditure, Addition to Long-Lived Assets     1 0  
Amortization     6 4  
Deferred income taxes and investment tax credits     27 17  
PPL Electric Utilities Corp [Member]          
Income Statement Data [Abstract]          
Revenues 693 673 1,512 1,443  
Energy purchases 169 153 398 367  
Depreciation 100 100 202 199  
Taxes, other than income 32 30 73 66  
Other Income (Expense) - net (11) (11) (22) (20)  
Interest Expense 62 61 122 123  
Income Taxes 43 46 97 94  
Net income (loss) [1] 139 150 323 299  
Balance Sheet Data [Abstract]          
Total Assets 15,892   $ 15,892   15,475
Segment (Numeric) [Abstract]          
Number of Reportable Segments | Integer     1    
Number of Operating Segments | Integer     2    
Amortization     $ 21 25  
Deferred income taxes and investment tax credits     48 60  
PPL Electric Utilities Corp [Member] | Related Party          
Segment (Numeric) [Abstract]          
Interest Income from affiliate 0 (10) (2) (20)  
Louisville Gas And Electric Co [Member]          
Income Statement Data [Abstract]          
Revenues 378 366 883 842  
Fuel 75 67 157 153  
Energy purchases 23 15 111 86  
Depreciation 77 77 151 153  
Taxes, other than income 13 12 26 25  
Other Income (Expense) - net (5) (4) (8) (6)  
Interest Expense 27 26 53 52  
Income Taxes 14 17 40 41  
Net income (loss) 56 [2] 62 161 [2] 155  
Balance Sheet Data [Abstract]          
Total Assets 8,196   8,196   7,992
Segment (Numeric) [Abstract]          
Goodwill 389   $ 389   389
Number of Reportable Segments | Integer     1    
Number of Operating Segments | Integer     1    
Amortization     $ 11 8  
Deferred income taxes and investment tax credits     1 2  
Kentucky Utilities Co [Member]          
Income Statement Data [Abstract]          
Revenues 472 464 1,036 989  
Fuel 117 115 269 238  
Energy purchases 7 6 14 12  
Depreciation 101 101 203 200  
Taxes, other than income 13 12 25 24  
Other Income (Expense) - net (5) (4) (10) (6)  
Interest Expense     70 67  
Income Taxes 19 19 50 46  
Net income (loss) [3] 78 77 203 185  
Balance Sheet Data [Abstract]          
Total Assets 10,331   10,331   10,073
Segment (Numeric) [Abstract]          
Goodwill 607   $ 607   $ 607
Number of Reportable Segments | Integer     1    
Number of Operating Segments | Integer     1    
Amortization     $ 8 9  
Deferred income taxes and investment tax credits     4 (7)  
Kentucky Utilities Co [Member] | Related Party          
Income Statement Data [Abstract]          
Interest Expense $ 0 $ 1 $ 0 $ 1  
[1] Net income equals comprehensive income.
[2] Net income equals comprehensive income.
[3] Net income equals comprehensive income.