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Maximum loan capacity under the revolving demand note agreement with an affiliate of the reporting entity.

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Intercompany receivable related to IRS private letter ruling permitting a transfer of excess funds from the PPL Bargaining Unite Retiree Health Plan VEBA to a new subaccount within the VEBA to be used to pay medical claims of active bargaining unit employees

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of interest expense incurred on a debt or other obligation to related party.

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The amount for notes payable (written promise to pay), due to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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The amount for notes payable (written promise to pay), payable to related parties, which are due after one year (or one business cycle).

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Amounts due from parties associated with the reporting entity as evidenced by a written promise to pay, due within 1 year (or 1 business cycle).

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Amount of transactions with related party during the financial reporting period.

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Related Party Transactions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
PPL Electric Utilities Corp [Member] \| PPL Services [Member]
Support Costs (Details) [Abstract]
Related Party Transaction, Amounts of Transaction	$ 13	$ 15	$ 29	$ 31
Intercompany Borrowings (Numeric) [Abstract]
VEBA Funds Receivable	40		40		$ 45
PPL Electric Utilities Corp [Member] \| PPL EU Services [Member]
Support Costs (Details) [Abstract]
Related Party Transaction, Amounts of Transaction	37	41	74	76
PPL Electric Utilities Corp [Member] \| PPL Energy Funding [Member]
Intercompany Borrowings (Numeric) [Abstract]
Intercompany note with affiliate maximum borrowing capacity	650		650
Notes Receivable, Related Parties, Current	0		0		0
PPL Electric Utilities Corp [Member] \| Accounts receivable from affiliates [Member] \| PPL Services [Member]
Intercompany Borrowings (Numeric) [Abstract]
VEBA Funds Receivable	10		10		10
PPL Electric Utilities Corp [Member] \| Other Noncurrent Assets [Member] \| PPL Services [Member]
Intercompany Borrowings (Numeric) [Abstract]
VEBA Funds Receivable	30		30		35
LG And E And KU Energy LLC [Member]
Intercompany Borrowings (Numeric) [Abstract]
Long-term debt to affiliate	650		650		650
Interest Expense with Affiliate	9	6	16	11
Notes payable with affiliates	203		203		113
LG And E And KU Energy LLC [Member] \| PPL Services [Member]
Support Costs (Details) [Abstract]
Related Party Transaction, Amounts of Transaction	5	7	14	14
LG And E And KU Energy LLC [Member] \| PPL Energy Funding [Member]
Intercompany Borrowings (Numeric) [Abstract]
Intercompany note with affiliate maximum borrowing capacity	375		375
Notes payable with affiliates	203		$ 203		$ 113
Related Party Transaction, Rate			3.93%		3.85%
LG And E And KU Energy LLC [Member] \| PPL Affiliate [Member]
Intercompany Borrowings (Numeric) [Abstract]
Intercompany note with affiliate maximum borrowing capacity	300		$ 300
Notes Receivable, Related Parties, Current	0		$ 0		$ 0
LG And E And KU Energy LLC [Member] \| Note Payable [Member] \| Affiliated Entity [Member]
Intercompany Borrowings (Numeric) [Abstract]
Debt instrument term (in years)			10 years
Long-term debt to affiliate	400		$ 400
Interest Expense with Affiliate	4	3	$ 7	7
Related Party Transaction, Rate			3.50%
LG And E And KU Energy LLC [Member] \| Note Payable [Member] \| Affiliated Entity [Member]
Intercompany Borrowings (Numeric) [Abstract]
Debt instrument term (in years)			10 years
Long-term debt to affiliate	250		$ 250
Interest Expense with Affiliate	3	2	$ 5	2
Related Party Transaction, Rate			4.00%
Louisville Gas And Electric Co [Member] \| LKS [Member]
Support Costs (Details) [Abstract]
Related Party Transaction, Amounts of Transaction	37	39	$ 75	77
Kentucky Utilities Co [Member] \| LKS [Member]
Support Costs (Details) [Abstract]
Related Party Transaction, Amounts of Transaction	$ 41	$ 43	$ 84	$ 85