Utility Rate Regulation (Regulatory Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 1,874	$ 1,819
Current Regulatory Assets	293	258
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	$ 86	107
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	$ 38	46
Gas Supply Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	41
Smart meter rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	6	5
Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	12	0
Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	97	118
Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	43	0
Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	79	69
Current Regulatory Assets	38	15
Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	887	778
Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	22	21
Interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	7	7
Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	58	63
Accumulated cost of removal of utility plant [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	178	212
AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	289	295
Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	4	38
Net Metering
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	112	61
Environmental Cost Recovery Mechanism
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	99	102
Taxes recoverable through future rates
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	47
Universal Service Rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	3
Derivative Instruments
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	8	0
Current Regulatory Assets	51	41
Rate adjustment mechanism
Regulatory Assets [Line Items]
Current Regulatory Assets	118	96
Renewable Energy Program
Regulatory Assets [Line Items]
Current Regulatory Assets	14	14
Distribution System Improvement Charge
Regulatory Assets [Line Items]
Current Regulatory Assets	7	5
PPL Electric Utilities Corp [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	598	568
Current Regulatory Assets	57	13
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] | Smart meter rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	6	5
PPL Electric Utilities Corp [Member] | Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	12	0
PPL Electric Utilities Corp [Member] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	31	0
PPL Electric Utilities Corp [Member] | Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Current Regulatory Assets	1	0
PPL Electric Utilities Corp [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	417	353
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	178	212
PPL Electric Utilities Corp [Member] | AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Current 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] | Taxes recoverable through future rates
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | Universal Service Rider [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	3
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	7	5
Louisville Gas And Electric Co [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	395	373
Current Regulatory Assets	7	23
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	$ 46	57
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	$ 10	12
Louisville Gas And Electric Co [Member] | Gas Supply Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	13
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] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	15	7
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	26	14
Current Regulatory Assets	4	1
Louisville Gas And Electric Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	217	209
Louisville Gas And Electric Co [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	10	11
Louisville Gas And Electric Co [Member] | Interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	7	7
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	34	37
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	76	76
Louisville Gas And Electric Co [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	3	9
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] | Taxes recoverable through future rates
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Louisville Gas And Electric Co [Member] | Universal Service Rider [Member]
Regulatory Assets [Line Items]
Current 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
Kentucky Utilities Co [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	439	442
Current Regulatory Assets	3	32
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	$ 40	50
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	$ 28	34
Kentucky Utilities Co [Member] | Gas Supply Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
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] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	14	3
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	17	13
Current Regulatory Assets	3	3
Kentucky Utilities Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	136	140
Kentucky Utilities Co [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	7	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	24	26
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	213	219
Kentucky Utilities Co [Member] | Fuel Adjustment Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	29
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] | Taxes recoverable through future rates
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Kentucky Utilities Co [Member] | Universal Service Rider [Member]
Regulatory Assets [Line Items]
Current 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