Utility Rate Regulation (Regulatory Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 2,060	$ 1,874
Current Regulatory Assets	320	293
Defined benefit plans [Member]
Regulatory Assets [Line Items]
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period	$ 79	86
Regulatory Asset Amortization Period	15 years
LGE [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Regulatory Asset Amortization Period	12 months
KU [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Regulatory Asset Amortization Period	12 months
Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 30	38
Smart meter rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	7	6
Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	68	12
Transmission Formula Rate [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	14	5
Gas Line Tracker [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	4	0
Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	113	97
Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	44	43
Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	41	43
Current Regulatory Assets	20	26
Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	967	887
Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	20	22
Interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	4	7
Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	53	58
Accumulated cost of removal of utility plant [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	173	178
AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	280	289
Net Metering
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	147	112
Environmental Cost Recovery Mechanism
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	96	99
Derivative Instruments
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	1	8
Current Regulatory Assets	3	51
Rate adjustment mechanism
Regulatory Assets [Line Items]
Current Regulatory Assets	95	118
Renewable Energy Program
Regulatory Assets [Line Items]
Current Regulatory Assets	14	14
Distribution System Improvement Charge
Regulatory Assets [Line Items]
Current Regulatory Assets	8	7
Gas line Inspections
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	24	21
Advanced metering Infrastructure
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	28	15
Retired asset recovery
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	83	0
TCJA (over/under collection)
Regulatory Assets [Line Items]
Current Regulatory Assets	21	0
ISR deferral
Regulatory Assets [Line Items]
Current Regulatory Assets	22	11
PPL Electric Utilities Corp [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	673	598
Current Regulatory Assets	133	57
PPL Electric Utilities Corp [Member] | Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Smart meter rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	7	6
PPL Electric Utilities Corp [Member] | Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	68	12
PPL Electric Utilities Corp [Member] | Transmission Formula Rate [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	2	0
PPL Electric Utilities Corp [Member] | Gas Line Tracker [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	22	0
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	27	31
PPL Electric Utilities Corp [Member] | Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	2	0
Current Regulatory Assets	0	1
PPL Electric Utilities Corp [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	473	417
PPL Electric Utilities Corp [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	3	3
PPL Electric Utilities Corp [Member] | Interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
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	173	178
PPL Electric Utilities Corp [Member] | AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Net Metering
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Environmental Cost Recovery Mechanism
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Derivative Instruments
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Current 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 Program
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	8	7
PPL Electric Utilities Corp [Member] | Gas line Inspections
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Advanced metering Infrastructure
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Retired asset recovery
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | TCJA (over/under collection)
Regulatory Assets [Line Items]
Current Regulatory Assets	21	0
PPL Electric Utilities Corp [Member] | ISR deferral
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Louisville Gas And Electric Co [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	491	395
Current Regulatory Assets	8	7
Louisville Gas And Electric Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period	$ 44	46
Regulatory Asset Amortization Period	15 years
Louisville Gas And Electric Co [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Regulatory Asset Amortization Period	12 months
Louisville Gas And Electric Co [Member] | Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 7	10
Louisville Gas And Electric Co [Member] | Smart meter rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | Transmission Formula Rate [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | Gas Line Tracker [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	4	0
Louisville Gas And Electric Co [Member] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	20	15
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] | Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Current Regulatory Assets	4	7
Louisville Gas And Electric Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	226	217
Louisville Gas And Electric Co [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	9	10
Louisville Gas And Electric Co [Member] | Interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	4	7
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	31	34
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] | AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	75	76
Louisville Gas And Electric Co [Member] | Net Metering
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | Environmental Cost Recovery Mechanism
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | Derivative Instruments
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Current 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 Program
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] | Gas line Inspections
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	22	19
Louisville Gas And Electric Co [Member] | Advanced metering Infrastructure
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	14	7
Louisville Gas And Electric Co [Member] | Retired asset recovery
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	83	0
Louisville Gas And Electric Co [Member] | TCJA (over/under collection)
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | ISR deferral
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	458	439
Current Regulatory Assets	1	3
Kentucky Utilities Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Deferred recovery of the difference between pension costs calculated with pension accounting policy and pension cost using 15 year amortization period	$ 35	40
Regulatory Asset Amortization Period	15 years
Kentucky Utilities Co [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Regulatory Asset Amortization Period	12 months
Kentucky Utilities Co [Member] | Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 23	28
Kentucky Utilities Co [Member] | Smart meter rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Transmission Formula Rate [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Gas Line Tracker [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	29	14
Kentucky Utilities Co [Member] | Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	8	7
Current Regulatory Assets	1	3
Kentucky Utilities Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	149	136
Kentucky Utilities Co [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	6	7
Kentucky Utilities Co [Member] | Interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	22	24
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] | AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	205	213
Kentucky Utilities Co [Member] | Net Metering
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Environmental Cost Recovery Mechanism
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Derivative Instruments
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Current 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 Program
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] | Gas line Inspections
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	2	2
Kentucky Utilities Co [Member] | Advanced metering Infrastructure
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	14	8
Kentucky Utilities Co [Member] | Retired asset recovery
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Kentucky Utilities Co [Member] | TCJA (over/under collection)
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
Kentucky Utilities Co [Member] | ISR deferral
Regulatory Assets [Line Items]
Current Regulatory Assets	$ 0	$ 0