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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Assets, Current [Abstract]    
Cash and cash equivalents $ 276 $ 331
Accounts receivable (less reserve:)    
Customer 999 950
Other 271 271
Unbilled revenues 371 428
Fuel, materials and supplies 477 505
Prepayments 212 103
Regulatory Assets, Current 330 293
Other current assets 101 51
Total Current Assets 3,037 2,932
Property, Plant and Equipment    
Regulated utility plant 39,031 38,608
Less:  accumulated depreciation - regulated utility plant 9,327 9,156
Regulated utility plant, net 29,704 29,452
Non-regulated property, plant and equipment 71 72
Less:  accumulated depreciation - non-regulated property, plant and equipment 24 23
Non-regulated property, plant and equipment, net 47 49
Construction work in progress 1,996 1,917
Property, Plant and Equipment, net 31,747 31,418
Other Noncurrent Assets    
Regulatory assets 1,859 1,874
Goodwill 2,247 2,247
Other intangibles 304 306
Other noncurrent assets 437 459
Assets, Noncurrent 4,847 4,886
Total Assets 39,631 39,236
Current Liabilities    
Short-term debt 291 992
Long-term debt due within one year 1 1
Accounts payable 903 1,104
Taxes 83 130
Interest 214 124
Dividends 186 173
Regulatory liabilities 223 225
Other current liabilities 474 591
Liabilities, Current, Total 2,375 3,340
Long-term Debt, Unclassified [Abstract]    
Long-term Debt 15,753 14,611
Deferred Credits and Other Noncurrent Liabilities    
Deferred income taxes 3,195 3,105
Investment tax credits 113 114
Accrued pension obligations 255 275
Asset retirement obligations 127 133
Regulatory liabilities 3,351 3,340
Other deferred credits and noncurrent liabilities 404 385
Total Deferred Credits and Other Noncurrent Liabilities 7,445 7,352
Commitments and Contingent Liabilities
Equity    
Common stock [1] 8 8
Additional paid-in capital 12,314 12,326
Treasury Stock (931) (948)
Earnings reinvested 2,828 2,710
Accumulated other comprehensive loss (161) (163)
Total Equity 14,058 13,933
Total Liabilities and Equity 39,631 39,236
PPL Electric Utilities Corp [Member]    
Assets, Current [Abstract]    
Cash and cash equivalents 21 51
Accounts receivable (less reserve:)    
Other 10 8
Unbilled revenues 119 149
Notes Receivable from affiliates 554 0
Fuel, materials and supplies 103 99
Prepayments 155 44
Regulatory Assets, Current 84 57
Other current assets 33 17
Total Current Assets 1,539 869
Property, Plant and Equipment    
Regulated utility plant 15,740 15,575
Less:  accumulated depreciation - regulated utility plant 3,889 3,822
Regulated utility plant, net 11,851 11,753
Construction work in progress 744 680
Property, Plant and Equipment, net 12,595 12,433
Other Noncurrent Assets    
Regulatory assets 592 598
Other intangibles 269 269
Other noncurrent assets 121 125
Assets, Noncurrent 982 992
Total Assets 15,116 14,294
Current Liabilities    
Short-term debt 0 509
Taxes 3 51
Interest 78 43
Regulatory liabilities 90 91
Other current liabilities 82 100
Liabilities, Current, Total 709 1,292
Long-term Debt, Unclassified [Abstract]    
Long-term Debt 5,211 4,567
Deferred Credits and Other Noncurrent Liabilities    
Deferred income taxes 1,608 1,573
Regulatory liabilities 839 836
Other deferred credits and noncurrent liabilities 110 123
Total Deferred Credits and Other Noncurrent Liabilities 2,557 2,532
Commitments and Contingent Liabilities
Equity    
Common stock [2] 364 364
Additional paid-in capital 4,715 4,040
Earnings reinvested 1,560 1,499
Total Equity 6,639 5,903
Total Liabilities and Equity $ 15,116 $ 14,294
Financing Receivable, after Allowance for Credit Loss, Related Party, Type [Extensible Enumeration] CEP Reserves, Inc CEP Reserves, Inc
PPL Electric Utilities Corp [Member] | Related Party    
Accounts receivable (less reserve:)    
Customer $ 10 $ 10
Notes Receivable from affiliates 554 0
Current Liabilities    
Accounts payable 52 44
PPL Electric Utilities Corp [Member] | Nonrelated Party    
Accounts receivable (less reserve:)    
Customer 450 434
Current Liabilities    
Accounts payable 404 454
Louisville Gas And Electric Co [Member]    
Assets, Current [Abstract]    
Cash and cash equivalents 8 18
Accounts receivable (less reserve:)    
Other 24 17
Unbilled revenues 72 88
Fuel, materials and supplies 130 143
Prepayments 11 11
Regulatory Assets, Current 14 7
Other current assets 6 0
Total Current Assets 454 429
Property, Plant and Equipment    
Regulated utility plant 7,715 7,669
Less:  accumulated depreciation - regulated utility plant 1,599 1,549
Regulated utility plant, net 6,116 6,120
Construction work in progress 342 312
Property, Plant and Equipment, net 6,458 6,432
Other Noncurrent Assets    
Regulatory assets 388 395
Goodwill 389 389
Other intangibles 17 18
Other noncurrent assets 92 90
Assets, Noncurrent 886 892
Total Assets 7,798 7,753
Current Liabilities    
Short-term debt 28 0
Taxes 15 41
Price risk management liabilities current 1 1
Interest 44 21
Current Customer Deposits 35 34
Regulatory liabilities 2 16
Asset Retirement Obligation, Current 13 13
Other current liabilities 32 47
Liabilities, Current, Total 374 337
Long-term Debt, Unclassified [Abstract]    
Long-term Debt 2,469 2,469
Deferred Credits and Other Noncurrent Liabilities    
Deferred income taxes 782 776
Investment tax credits 30 31
Asset retirement obligations 71 72
Regulatory liabilities 824 827
Price risk management liabilities 4 6
Other deferred credits and noncurrent liabilities 67 63
Total Deferred Credits and Other Noncurrent Liabilities 1,778 1,775
Commitments and Contingent Liabilities
Equity    
Common stock [3] 424 424
Additional paid-in capital 1,942 1,993
Earnings reinvested 811 755
Total Equity 3,177 3,172
Total Liabilities and Equity 7,798 7,753
Louisville Gas And Electric Co [Member] | Related Party    
Accounts receivable (less reserve:)    
Customer 40 29
Notes Receivable from affiliates 28 0
Current Liabilities    
Accounts payable 83 49
Louisville Gas And Electric Co [Member] | Nonrelated Party    
Accounts receivable (less reserve:)    
Customer 121 116
Current Liabilities    
Accounts payable 121 115
Kentucky Utilities Co [Member]    
Assets, Current [Abstract]    
Cash and cash equivalents 12 14
Accounts receivable (less reserve:)    
Customer 152 143
Other 19 12
Unbilled revenues 91 97
Fuel, materials and supplies 177 185
Prepayments 11 13
Regulatory Assets, Current 7 3
Other current assets 2 1
Total Current Assets 471 468
Property, Plant and Equipment    
Regulated utility plant 10,038 9,896
Less:  accumulated depreciation - regulated utility plant 2,547 2,476
Regulated utility plant, net 7,491 7,420
Construction work in progress 594 604
Property, Plant and Equipment, net 8,085 8,024
Other Noncurrent Assets    
Regulatory assets 435 439
Goodwill 607 607
Other intangibles 18 19
Other noncurrent assets 157 157
Assets, Noncurrent 1,217 1,222
Total Assets 9,773 9,714
Current Liabilities    
Short-term debt $ 45 $ 93
Notes Payable, Related Party, Type [Extensible Enumeration] Affiliated Entity [Member] Affiliated Entity [Member]
Notes Payable to affiliates $ 37 $ 0
Taxes 15 32
Interest 56 24
Current Customer Deposits 38 35
Regulatory liabilities 6 1
Asset Retirement Obligation, Current 16 13
Other current liabilities 44 52
Liabilities, Current, Total 450 402
Long-term Debt, Unclassified [Abstract]    
Long-term Debt 3,064 3,064
Deferred Credits and Other Noncurrent Liabilities    
Deferred income taxes 917 912
Investment tax credits 83 83
Asset retirement obligations 48 53
Regulatory liabilities 1,016 1,018
Other deferred credits and noncurrent liabilities 32 30
Total Deferred Credits and Other Noncurrent Liabilities 2,096 2,096
Commitments and Contingent Liabilities
Equity    
Common stock [4] 308 308
Additional paid-in capital 2,983 3,033
Earnings reinvested 872 811
Total Equity 4,163 4,152
Total Liabilities and Equity 9,773 9,714
Kentucky Utilities Co [Member] | Related Party    
Current Liabilities    
Accounts payable 123 72
Kentucky Utilities Co [Member] | Nonrelated Party    
Current Liabilities    
Accounts payable $ 70 $ 80
[1] 1,560,000 shares authorized, 770,013 shares issued and 737,736 shares outstanding at March 31, 2024. 1,560,000 shares authorized, 770,013 shares issued and 737,130 shares outstanding at December 31, 2023.
[2] 170,000 shares authorized; 66,368 shares issued and outstanding at March 31, 2024 and December 31, 2023.
[3] 75,000 shares authorized; 21,294 shares issued and outstanding at March 31, 2024 and December 31, 2023.
[4] 80,000 shares authorized; 37,818 shares issued and outstanding at March 31, 2024 and December 31, 2023.