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Segment and Related Information (Income Statement and Balance Sheet Data) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Integer
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Income Statement Data      
Operating Revenues from external customers $ 9,042 $ 8,462 $ 8,312
Fuel 855 783 733
Energy purchases 1,892 1,679 1,841
Depreciation 1,312 1,279 1,254
Taxes, other than income 423 374 392
Other Income (Expense) - net (151) (114) 40
Amortization 104 78 81
Interest Expense, Operating and Nonoperating 808 738 666
Income Before Income Taxes 1,472 1,116 924
Income Taxes 291 228 184
Deferred income taxes and investment tax credits 192 196 322
Net income (loss) 1,181 888 740
Cash Flow Data      
Expenditures for long-lived assets 4,042 2,805 2,390
Balance Sheet Data      
Total Assets $ 45,244 41,069  
Segment Information (Numeric) [Abstract]      
Number of reportable segments | Integer 3    
PPL Electric Utilities Corp [Member]      
Income Statement Data      
Operating Revenues from external customers $ 3,113 2,876 3,008
Energy purchases 876 721 992
Depreciation 413 401 397
Taxes, other than income 151 131 143
Other Income (Expense) - net (48) (45) (39)
Amortization 48 45 41
Interest Expense, Operating and Nonoperating 257 246 223
Income Before Income Taxes 843 750 687
Income Taxes 204 176 168
Deferred income taxes and investment tax credits 24 129 46
Net income (loss) [1] 639 574 519
Balance Sheet Data      
Total Assets $ 16,886 15,475  
Segment Information (Numeric) [Abstract]      
Number of operating segments | Integer 2    
Number of reportable segments | Integer 1    
PPL Electric Utilities Corp [Member] | Related Party      
Segment Information (Numeric) [Abstract]      
Interest Income, Other $ (9) (33) 0
LOUISVILLE GAS And ELECTRIC CO [Member]      
Income Statement Data      
Operating Revenues from external customers 1,748 1,648 1,613
Fuel 338 308 286
Energy purchases 187 151 168
Depreciation 307 305 302
Taxes, other than income 51 49 48
Other Income (Expense) - net (24) (12) (3)
Amortization 24 16 14
Interest Expense, Operating and Nonoperating 116 105 102
Income Before Income Taxes 387 374 335
Income Taxes 78 77 69
Deferred income taxes and investment tax credits (9) 6 (14)
Net income (loss) 309 297 [2] 266 [2]
Balance Sheet Data      
Total Assets $ 8,818 7,992  
Segment Information (Numeric) [Abstract]      
Number of operating segments | Integer 1    
Number of reportable segments | Integer 1    
LOUISVILLE GAS And ELECTRIC CO [Member] | Related Party      
Segment Information (Numeric) [Abstract]      
Interest Income, Other $ 0 (1) (1)
Kentucky Utilities Co [Member]      
Income Statement Data      
Operating Revenues from external customers 2,064 1,964 1,884
Fuel 517 476 447
Energy purchases 26 25 24
Depreciation 408 403 392
Taxes, other than income 51 49 45
Other Income (Expense) - net (29) (15) (8)
Amortization 21 21 20
Income Before Income Taxes 497 445 389
Income Taxes 99 89 77
Deferred income taxes and investment tax credits 0 (15) (10)
Net income (loss) [3] 398 356 312
Balance Sheet Data      
Total Assets $ 10,758 10,073  
Segment Information (Numeric) [Abstract]      
Number of operating segments | Integer 1    
Number of reportable segments | Integer 1    
Kentucky Utilities Co [Member] | Related Party      
Income Statement Data      
Interest Expense, Operating and Nonoperating $ 0 0 1
Total Segments      
Income Statement Data      
Operating Revenues from external customers 9,041 8,462 8,311
Fuel 855 783 733
Energy purchases 1,892 1,679 1,842
Operation and maintenance 2,299 2,239 2,136
Depreciation 1,307 1,276 1,249
Taxes, other than income 423 374 392
Other Income (Expense) - net (134) (94) (70)
Amortization 92 70 75
Interest Expense, Operating and Nonoperating (632) (581) (541)
Income Taxes (381) (358) (321)
Deferred income taxes and investment tax credits 43 169 77
Net income (loss) (1,398) (1,303) (1,167)
Cash Flow Data      
Expenditures for long-lived assets 4,040 2,812 2,360
Total Segments | Related Party      
Segment Information (Numeric) [Abstract]      
Interest Income, Other (12) (37)  
Rhode Island Regulated      
Income Statement Data      
Operating Revenues from external customers 2,168 2,024 1,851
Fuel 0 0 0
Energy purchases 802 782 658
Operation and maintenance 851 731 705
Depreciation 177 165 156
Taxes, other than income 170 144 156
Other Income (Expense) - net (33) (20) (19)
Amortization 1 1 1
Interest Expense, Operating and Nonoperating (111) (95) (83)
Income Taxes (8) (22) (16)
Deferred income taxes and investment tax credits 28 38 48
Net income (loss) (85) (109) (96)
Cash Flow Data      
Expenditures for long-lived assets 668 495 454
Balance Sheet Data      
Total Assets 7,510 7,055  
Rhode Island Regulated | Related Party      
Segment Information (Numeric) [Abstract]      
Interest Income, Other (3) (4)  
Kentucky Regulated [Member]      
Income Statement Data      
Operating Revenues from external customers 3,760 3,562 3,452
Fuel 855 783 733
Energy purchases 214 176 192
Operation and maintenance 818 803 826
Depreciation 717 710 696
Taxes, other than income 102 99 93
Other Income (Expense) - net (53) (29) (12)
Amortization 43 24 33
Interest Expense, Operating and Nonoperating (264) (240) (235)
Income Taxes (169) (160) (137)
Deferred income taxes and investment tax credits (9) 2 (17)
Net income (loss) (674) (620) (552)
Cash Flow Data      
Expenditures for long-lived assets 1,752 1,088 950
Balance Sheet Data      
Total Assets 19,060 17,626  
Kentucky Regulated [Member] | Related Party      
Segment Information (Numeric) [Abstract]      
Interest Income, Other 0 0  
Pennsylvania Regulated [Member]      
Income Statement Data      
Operating Revenues from external customers 3,113 2,876 3,008
Fuel 0 0 0
Energy purchases 876 721 992
Operation and maintenance 630 705 605
Depreciation 413 401 397
Taxes, other than income 151 131 143
Other Income (Expense) - net (48) (45) (39)
Amortization 48 45 41
Interest Expense, Operating and Nonoperating (257) (246) (223)
Income Taxes (204) (176) (168)
Deferred income taxes and investment tax credits 24 129 46
Net income (loss) (639) (574) (519)
Cash Flow Data      
Expenditures for long-lived assets 1,620 1,229 956
Balance Sheet Data      
Total Assets 16,886 15,475  
Pennsylvania Regulated [Member] | Related Party      
Segment Information (Numeric) [Abstract]      
Interest Income, Other (9) (33)  
Corporate And Other [Member]      
Income Statement Data      
Operating Revenues from external customers 1 0 1
Amortization 12 8 6
Deferred income taxes and investment tax credits 149 27 245
Net income (loss) 217 415 427
Cash Flow Data      
Expenditures for long-lived assets 2 (7) $ 30
Balance Sheet Data      
Total Assets $ 1,788 $ 913  
[1] Net income equals comprehensive income.
[2] Net income equals comprehensive income.
[3] Net income equals comprehensive income.