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Utility Rate Regulation (Regulatory Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 2,092	$ 2,060
Current Regulatory Assets	308	320
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	$ 72	79
Regulatory Asset Amortization Period	15 years
Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 23	30
Gas Supply Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	10	3
Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	53	68
Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	113	113
Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	61	44
Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	32	46
Current Regulatory Assets	31	53
Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	961	967
Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	18	20
Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	47	53
Accumulated cost of removal of utility plant [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	184	173
AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	263	280
Net Metering
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	164	147
Environmental Cost Recovery Mechanism
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	102	96
Rate adjustment mechanism
Regulatory Assets [Line Items]
Current Regulatory Assets	86	95
Renewable Energy Program
Regulatory Assets [Line Items]
Current Regulatory Assets	21	14
Gas line Inspections
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	24	24
Advanced metering Infrastructure
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	67	28
Retired asset recovery
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	76	83
TCJA (over/under collection)
Regulatory Assets [Line Items]
Current Regulatory Assets	40	21
ISR deferral
Regulatory Assets [Line Items]
Current Regulatory Assets	6	22
IT system costs
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	18	0
PPL Electric Utilities Corp [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	725	673
Current Regulatory Assets	112	133
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] | Storm Damage Expense rider
Regulatory Assets [Line Items]
Current Regulatory Assets	53	68
PPL Electric Utilities Corp [Member] | Storm costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	42	22
PPL Electric Utilities Corp [Member] | Transmission Service Charge [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	0	27
PPL Electric Utilities Corp [Member] | Other [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	2	2
Current Regulatory Assets	19	17
PPL Electric Utilities Corp [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	477	473
PPL Electric Utilities Corp [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	2	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	184	173
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] | 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] | 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	40	21
PPL Electric Utilities Corp [Member] | ISR deferral
Regulatory Assets [Line Items]
Current Regulatory Assets	0	0
PPL Electric Utilities Corp [Member] | IT system costs
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	18	0
Louisville Gas And Electric Co [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	482	491
Current Regulatory Assets	19	8
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	$ 41	44
Regulatory Asset Amortization Period	15 years
Louisville Gas And Electric Co [Member] | Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 5	7
Louisville Gas And Electric Co [Member] | Gas Supply Clause [Member]
Regulatory Assets [Line Items]
Current Regulatory Assets	10	3
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	24	20
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	6	4
Current Regulatory Assets	9	5
Louisville Gas And Electric Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	212	226
Louisville Gas And Electric Co [Member] | Unamortized loss on debt [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	8	9
Louisville Gas And Electric Co [Member] | Terminated interest rate swaps [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	28	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] | AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	73	75
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] | 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] | Gas line Inspections
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	22	22
Louisville Gas And Electric Co [Member] | Advanced metering Infrastructure
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	28	14
Louisville Gas And Electric Co [Member] | Retired asset recovery
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	76	83
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
Louisville Gas And Electric Co [Member] | IT system costs
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	0	0
Kentucky Utilities Co [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	467	458
Current Regulatory Assets	1	1
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	$ 31	35
Regulatory Asset Amortization Period	15 years
Kentucky Utilities Co [Member] | Plant outage costs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 18	23
Kentucky Utilities Co [Member] | Gas Supply Clause [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	38	29
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	11	8
Current Regulatory Assets	1	1
Kentucky Utilities Co [Member] | Defined benefit plans [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	144	149
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	19	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] | AROs [Member]
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	190	205
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] | 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] | 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	39	14
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
Kentucky Utilities Co [Member] | IT system costs
Regulatory Assets [Line Items]
Noncurrent Regulatory Assets	$ 0	$ 0

X

- Definition

Amount of deferred recovery of the difference between the pension cost calculated in accordance with the entities pension accounting policy and pension cost using a 15 year amortization period for actuarial gains and losses.

+ References

No definition available.

+ Details

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- Definition

Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478742/980-340-50-1

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- Definition

Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478742/980-340-50-1

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