v3.25.2
Utility Rate Regulation - Regulatory Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Regulatory Assets [Line Items]    
Current regulatory assets $ 303 $ 320
Noncurrent regulatory assets 2,055 2,060
Plant outage costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 27 30
Gas supply clause [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 20 3
Transmission Service Charge [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 52 44
Defined Benefit Plans [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 959 967
Storm Costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 114 113
Unamortized Loss On Debt [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 19 20
Terminated Interest Rate Swaps [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 49 53
Accumulated Cost Of Removal Of Utility Plant [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 168 173
Asset Retirement Obligations [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 275 280
Storm Damage costs[Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 45 68
Net metering    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 159 147
Rate adjustment mechanism    
Regulatory Assets [Line Items]    
Current regulatory assets 99 95
Renewable energy certificates    
Regulatory Assets [Line Items]    
Current regulatory assets 21 14
Distribution System Improvement Charge    
Regulatory Assets [Line Items]    
Current regulatory assets 9 8
Other    
Regulatory Assets [Line Items]    
Current regulatory assets 21 45
Noncurrent regulatory assets 50 46
Environmental cost recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 96 96
Tax Cuts and Jobs Act (over/under)    
Regulatory Assets [Line Items]    
Current regulatory assets 30 21
Gas line Inspections    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 24 24
Advance metering Infrastructure    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 35 28
ISR deferral    
Regulatory Assets [Line Items]    
Current regulatory assets 6 22
Retired asset recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 80 83
PPL Electric Utilities Corp [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 92 133
Noncurrent regulatory assets 692 673
PPL Electric Utilities Corp [Member] | Plant outage costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Gas supply clause [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 27
PPL Electric Utilities Corp [Member] | Defined Benefit Plans [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 471 473
PPL Electric Utilities Corp [Member] | Storm Costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 42 22
PPL Electric Utilities Corp [Member] | Unamortized Loss On Debt [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 3 3
PPL Electric Utilities Corp [Member] | Terminated Interest Rate Swaps [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Accumulated Cost Of Removal Of Utility Plant [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 168 173
PPL Electric Utilities Corp [Member] | Asset Retirement Obligations [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Storm Damage costs[Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 45 68
PPL Electric Utilities Corp [Member] | Net metering    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Rate adjustment mechanism    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Renewable energy certificates    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Distribution System Improvement Charge    
Regulatory Assets [Line Items]    
Current regulatory assets 9 8
PPL Electric Utilities Corp [Member] | Other    
Regulatory Assets [Line Items]    
Current regulatory assets 8 9
Noncurrent regulatory assets 8 2
PPL Electric Utilities Corp [Member] | Environmental cost recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Tax Cuts and Jobs Act (over/under)    
Regulatory Assets [Line Items]    
Current regulatory assets 30 21
PPL Electric Utilities Corp [Member] | Gas line Inspections    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Advance metering Infrastructure    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
PPL Electric Utilities Corp [Member] | ISR deferral    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
PPL Electric Utilities Corp [Member] | Retired asset recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Louisville Gas And Electric Co [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 26 8
Noncurrent regulatory assets 488 491
Louisville Gas And Electric Co [Member] | Plant outage costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 6 7
Louisville Gas And Electric Co [Member] | Gas supply clause [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 20 3
Louisville Gas And Electric Co [Member] | Transmission Service Charge [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Defined Benefit Plans [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 219 226
Louisville Gas And Electric Co [Member] | Storm Costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 24 20
Louisville Gas And Electric Co [Member] | Unamortized Loss On Debt [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 9 9
Louisville Gas And Electric Co [Member] | Terminated Interest Rate Swaps [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 29 31
Louisville Gas And Electric Co [Member] | Accumulated Cost Of Removal Of Utility Plant [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Asset Retirement Obligations [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 76 75
Louisville Gas And Electric Co [Member] | Storm Damage costs[Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Net metering    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Rate adjustment mechanism    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Renewable energy certificates    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Distribution System Improvement Charge    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Other    
Regulatory Assets [Line Items]    
Current regulatory assets 6 5
Noncurrent regulatory assets 5 4
Louisville Gas And Electric Co [Member] | Environmental cost recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Tax Cuts and Jobs Act (over/under)    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Gas line Inspections    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 22 22
Louisville Gas And Electric Co [Member] | Advance metering Infrastructure    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 18 14
Louisville Gas And Electric Co [Member] | ISR deferral    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Louisville Gas And Electric Co [Member] | Retired asset recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 80 83
Kentucky Utilities Co [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 1
Noncurrent regulatory assets 462 458
Kentucky Utilities Co [Member] | Plant outage costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 21 23
Kentucky Utilities Co [Member] | Gas supply clause [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Transmission Service Charge [Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Defined Benefit Plans [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 150 149
Kentucky Utilities Co [Member] | Storm Costs [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 37 29
Kentucky Utilities Co [Member] | Unamortized Loss On Debt [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 6 6
Kentucky Utilities Co [Member] | Terminated Interest Rate Swaps [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 20 22
Kentucky Utilities Co [Member] | Accumulated Cost Of Removal Of Utility Plant [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Kentucky Utilities Co [Member] | Asset Retirement Obligations [Member]    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 199 205
Kentucky Utilities Co [Member] | Storm Damage costs[Member]    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Net metering    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Kentucky Utilities Co [Member] | Rate adjustment mechanism    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Renewable energy certificates    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Distribution System Improvement Charge    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Other    
Regulatory Assets [Line Items]    
Current regulatory assets 0 1
Noncurrent regulatory assets 10 8
Kentucky Utilities Co [Member] | Environmental cost recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 0 0
Kentucky Utilities Co [Member] | Tax Cuts and Jobs Act (over/under)    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Gas line Inspections    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 2 2
Kentucky Utilities Co [Member] | Advance metering Infrastructure    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets 17 14
Kentucky Utilities Co [Member] | ISR deferral    
Regulatory Assets [Line Items]    
Current regulatory assets 0 0
Kentucky Utilities Co [Member] | Retired asset recovery    
Regulatory Assets [Line Items]    
Noncurrent regulatory assets $ 0 $ 0