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Leases (Tables) | 9 Months Ended
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Sep. 30, 2019
Lessee, Lease, Description [Line Items] |
Lease, Cost | The following table provides the components of lease cost for the Registrants' operating leases for the periods ended September 30, 2019.
| Three Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 6 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 3 |
Short-term lease cost | 2 |  |  | 1 |  |  | — |  |  | 1 |
Total lease cost | $ | 8 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 4 |
| Nine Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 21 |  |  | $ | 17 |  |  | $ | 7 |  |  | $ | 9 |
Short-term lease cost | 5 |  |  | 2 |  |  | 1 |  |  | 1 |
Total lease cost | $ | 26 |  |  | $ | 19 |  |  | $ | 8 |  |  | $ | 10 |
The following table provides other key information related to the Registrants' operating leases at September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows from operating leases | $ | 21 |  |  | $ | 17 |  |  | $ | 8 |  |  | $ | 9 |
Right-of-use asset obtained in exchange for new operating lease liabilities | 37 |  |  | 8 |  |  | 3 |  |  | 5 |
Lessee, Operating Lease, Liability, Maturity | The following table provides the total future minimum rental payments for operating leases, as well as a reconciliation of these undiscounted cash flows to the lease liabilities recognized on the Balance Sheets as of September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 8 |  |  | $ | 5 |  |  | $ | 2 |  |  | $ | 3 |
2020 | 27 |  |  | 16 |  |  | 6 |  |  | 10 |
2021 | 21 |  |  | 12 |  |  | 5 |  |  | 7 |
2022 | 16 |  |  | 8 |  |  | 3 |  |  | 5 |
2023 | 14 |  |  | 7 |  |  | 3 |  |  | 3 |
2024 | 12 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 25 |  |  | 7 |  |  | 3 |  |  | 3 |
Total | $ | 123 |  |  | $ | 61 |  |  | $ | 25 |  |  | $ | 34 |
Weighted-average discount rate | 3.47 | % |  | 3.97 | % |  | 3.9 | % |  | 4.01 | %
Weighted-average remaining lease term (in years) | 8 |  |  | 5 |  |  | 5 |  |  | 5 |
Current lease liabilities (b) | $ | 25 |  |  | $ | 16 |  |  | $ | 6 |  |  | $ | 9 |
Non-current lease liabilities (b) | 80 |  |  | 39 |  |  | 16 |  |  | 22 |
Right-of-use assets (c) | 97 |  |  | 47 |  |  | 19 |  |  | 27 |
(a) | Represents future minimum lease payments for the remainder of 2019.
(b) | Current lease liabilities are included in "Other Current Liabilities" on the Balance Sheets. Non-current lease liabilities are included in "Other deferred credits and noncurrent liabilities" on the Balance Sheets. The difference between the total future minimum lease payments and the recorded lease liabilities is due to the impact of discounting.
(c) | Right-of-use assets are included in "Other noncurrent assets" on the Balance Sheets.
At December 31, 2018, the total future minimum rental payments for all operating leases were estimated to be:
| PPL |  | LKE |  | LG&E |  | KU
2019 | $ | 26 |  |  | $ | 20 |  |  | $ | 10 |  |  | $ | 10 |
2020 | 21 |  |  | 15 |  |  | 6 |  |  | 9 |
2021 | 15 |  |  | 11 |  |  | 4 |  |  | 7 |
2022 | 13 |  |  | 7 |  |  | 3 |  |  | 4 |
2023 | 8 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 33 |  |  | 11 |  |  | 4 |  |  | 6 |
Total | $ | 116 |  |  | $ | 70 |  |  | $ | 30 |  |  | $ | 39 |
Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] | At September 30, 2019, PPL, LKE, LG&E and KU expect to receive the following fixed lease payments over the remaining term of their operating lease agreements:
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 3 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 2 |
2020 | 13 |  |  | 7 |  |  | — |  |  | 7 |
2021 | 10 |  |  | 5 |  |  | 1 |  |  | 4 |
2022 | 4 |  |  | — |  |  | — |  |  | — |
2023 | 4 |  |  | 1 |  |  | — |  |  | — |
2024 | 4 |  |  | — |  |  | — |  |  | — |
Thereafter | 12 |  |  | — |  |  | — |  |  | — |
Total | $ | 50 |  |  | $ | 15 |  |  | $ | 1 |  |  | $ | 13 |
Lease income recognized for the three months ended September 30, 2019 | $ | 6 |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 2 |
Lease income recognized for the nine months ended September 30, 2019 | $ | 16 |  |  | $ | 10 |  |  | $ | 4 |  |  | $ | 6 |
(a) | Represents future minimum lease payments for the remainder of 2019.
LG And E And KU Energy LLC [Member] |
Lessee, Lease, Description [Line Items] |
Lease, Cost | The following table provides the components of lease cost for the Registrants' operating leases for the periods ended September 30, 2019.
| Three Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 6 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 3 |
Short-term lease cost | 2 |  |  | 1 |  |  | — |  |  | 1 |
Total lease cost | $ | 8 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 4 |
| Nine Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 21 |  |  | $ | 17 |  |  | $ | 7 |  |  | $ | 9 |
Short-term lease cost | 5 |  |  | 2 |  |  | 1 |  |  | 1 |
Total lease cost | $ | 26 |  |  | $ | 19 |  |  | $ | 8 |  |  | $ | 10 |
The following table provides other key information related to the Registrants' operating leases at September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows from operating leases | $ | 21 |  |  | $ | 17 |  |  | $ | 8 |  |  | $ | 9 |
Right-of-use asset obtained in exchange for new operating lease liabilities | 37 |  |  | 8 |  |  | 3 |  |  | 5 |
Lessee, Operating Lease, Liability, Maturity | The following table provides the total future minimum rental payments for operating leases, as well as a reconciliation of these undiscounted cash flows to the lease liabilities recognized on the Balance Sheets as of September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 8 |  |  | $ | 5 |  |  | $ | 2 |  |  | $ | 3 |
2020 | 27 |  |  | 16 |  |  | 6 |  |  | 10 |
2021 | 21 |  |  | 12 |  |  | 5 |  |  | 7 |
2022 | 16 |  |  | 8 |  |  | 3 |  |  | 5 |
2023 | 14 |  |  | 7 |  |  | 3 |  |  | 3 |
2024 | 12 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 25 |  |  | 7 |  |  | 3 |  |  | 3 |
Total | $ | 123 |  |  | $ | 61 |  |  | $ | 25 |  |  | $ | 34 |
Weighted-average discount rate | 3.47 | % |  | 3.97 | % |  | 3.9 | % |  | 4.01 | %
Weighted-average remaining lease term (in years) | 8 |  |  | 5 |  |  | 5 |  |  | 5 |
Current lease liabilities (b) | $ | 25 |  |  | $ | 16 |  |  | $ | 6 |  |  | $ | 9 |
Non-current lease liabilities (b) | 80 |  |  | 39 |  |  | 16 |  |  | 22 |
Right-of-use assets (c) | 97 |  |  | 47 |  |  | 19 |  |  | 27 |
(a) | Represents future minimum lease payments for the remainder of 2019.
(b) | Current lease liabilities are included in "Other Current Liabilities" on the Balance Sheets. Non-current lease liabilities are included in "Other deferred credits and noncurrent liabilities" on the Balance Sheets. The difference between the total future minimum lease payments and the recorded lease liabilities is due to the impact of discounting.
(c) | Right-of-use assets are included in "Other noncurrent assets" on the Balance Sheets.
At December 31, 2018, the total future minimum rental payments for all operating leases were estimated to be:
| PPL |  | LKE |  | LG&E |  | KU
2019 | $ | 26 |  |  | $ | 20 |  |  | $ | 10 |  |  | $ | 10 |
2020 | 21 |  |  | 15 |  |  | 6 |  |  | 9 |
2021 | 15 |  |  | 11 |  |  | 4 |  |  | 7 |
2022 | 13 |  |  | 7 |  |  | 3 |  |  | 4 |
2023 | 8 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 33 |  |  | 11 |  |  | 4 |  |  | 6 |
Total | $ | 116 |  |  | $ | 70 |  |  | $ | 30 |  |  | $ | 39 |
Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] | At September 30, 2019, PPL, LKE, LG&E and KU expect to receive the following fixed lease payments over the remaining term of their operating lease agreements:
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 3 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 2 |
2020 | 13 |  |  | 7 |  |  | — |  |  | 7 |
2021 | 10 |  |  | 5 |  |  | 1 |  |  | 4 |
2022 | 4 |  |  | — |  |  | — |  |  | — |
2023 | 4 |  |  | 1 |  |  | — |  |  | — |
2024 | 4 |  |  | — |  |  | — |  |  | — |
Thereafter | 12 |  |  | — |  |  | — |  |  | — |
Total | $ | 50 |  |  | $ | 15 |  |  | $ | 1 |  |  | $ | 13 |
Lease income recognized for the three months ended September 30, 2019 | $ | 6 |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 2 |
Lease income recognized for the nine months ended September 30, 2019 | $ | 16 |  |  | $ | 10 |  |  | $ | 4 |  |  | $ | 6 |
(a) | Represents future minimum lease payments for the remainder of 2019.
Louisville Gas And Electric Co [Member] |
Lessee, Lease, Description [Line Items] |
Lease, Cost | The following table provides the components of lease cost for the Registrants' operating leases for the periods ended September 30, 2019.
| Three Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 6 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 3 |
Short-term lease cost | 2 |  |  | 1 |  |  | — |  |  | 1 |
Total lease cost | $ | 8 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 4 |
| Nine Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 21 |  |  | $ | 17 |  |  | $ | 7 |  |  | $ | 9 |
Short-term lease cost | 5 |  |  | 2 |  |  | 1 |  |  | 1 |
Total lease cost | $ | 26 |  |  | $ | 19 |  |  | $ | 8 |  |  | $ | 10 |
The following table provides other key information related to the Registrants' operating leases at September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows from operating leases | $ | 21 |  |  | $ | 17 |  |  | $ | 8 |  |  | $ | 9 |
Right-of-use asset obtained in exchange for new operating lease liabilities | 37 |  |  | 8 |  |  | 3 |  |  | 5 |
Lessee, Operating Lease, Liability, Maturity | The following table provides the total future minimum rental payments for operating leases, as well as a reconciliation of these undiscounted cash flows to the lease liabilities recognized on the Balance Sheets as of September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 8 |  |  | $ | 5 |  |  | $ | 2 |  |  | $ | 3 |
2020 | 27 |  |  | 16 |  |  | 6 |  |  | 10 |
2021 | 21 |  |  | 12 |  |  | 5 |  |  | 7 |
2022 | 16 |  |  | 8 |  |  | 3 |  |  | 5 |
2023 | 14 |  |  | 7 |  |  | 3 |  |  | 3 |
2024 | 12 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 25 |  |  | 7 |  |  | 3 |  |  | 3 |
Total | $ | 123 |  |  | $ | 61 |  |  | $ | 25 |  |  | $ | 34 |
Weighted-average discount rate | 3.47 | % |  | 3.97 | % |  | 3.9 | % |  | 4.01 | %
Weighted-average remaining lease term (in years) | 8 |  |  | 5 |  |  | 5 |  |  | 5 |
Current lease liabilities (b) | $ | 25 |  |  | $ | 16 |  |  | $ | 6 |  |  | $ | 9 |
Non-current lease liabilities (b) | 80 |  |  | 39 |  |  | 16 |  |  | 22 |
Right-of-use assets (c) | 97 |  |  | 47 |  |  | 19 |  |  | 27 |
(a) | Represents future minimum lease payments for the remainder of 2019.
(b) | Current lease liabilities are included in "Other Current Liabilities" on the Balance Sheets. Non-current lease liabilities are included in "Other deferred credits and noncurrent liabilities" on the Balance Sheets. The difference between the total future minimum lease payments and the recorded lease liabilities is due to the impact of discounting.
(c) | Right-of-use assets are included in "Other noncurrent assets" on the Balance Sheets.
At December 31, 2018, the total future minimum rental payments for all operating leases were estimated to be:
| PPL |  | LKE |  | LG&E |  | KU
2019 | $ | 26 |  |  | $ | 20 |  |  | $ | 10 |  |  | $ | 10 |
2020 | 21 |  |  | 15 |  |  | 6 |  |  | 9 |
2021 | 15 |  |  | 11 |  |  | 4 |  |  | 7 |
2022 | 13 |  |  | 7 |  |  | 3 |  |  | 4 |
2023 | 8 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 33 |  |  | 11 |  |  | 4 |  |  | 6 |
Total | $ | 116 |  |  | $ | 70 |  |  | $ | 30 |  |  | $ | 39 |
Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] | At September 30, 2019, PPL, LKE, LG&E and KU expect to receive the following fixed lease payments over the remaining term of their operating lease agreements:
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 3 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 2 |
2020 | 13 |  |  | 7 |  |  | — |  |  | 7 |
2021 | 10 |  |  | 5 |  |  | 1 |  |  | 4 |
2022 | 4 |  |  | — |  |  | — |  |  | — |
2023 | 4 |  |  | 1 |  |  | — |  |  | — |
2024 | 4 |  |  | — |  |  | — |  |  | — |
Thereafter | 12 |  |  | — |  |  | — |  |  | — |
Total | $ | 50 |  |  | $ | 15 |  |  | $ | 1 |  |  | $ | 13 |
Lease income recognized for the three months ended September 30, 2019 | $ | 6 |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 2 |
Lease income recognized for the nine months ended September 30, 2019 | $ | 16 |  |  | $ | 10 |  |  | $ | 4 |  |  | $ | 6 |
(a) Represents future minimum lease payments for the remainder of 2019.
Kentucky Utilities Co [Member] |
Lessee, Lease, Description [Line Items] |
Lease, Cost | The following table provides the components of lease cost for the Registrants' operating leases for the periods ended September 30, 2019.
| Three Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 6 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 3 |
Short-term lease cost | 2 |  |  | 1 |  |  | — |  |  | 1 |
Total lease cost | $ | 8 |  |  | $ | 6 |  |  | $ | 1 |  |  | $ | 4 |
| Nine Months
| PPL |  | LKE |  | LG&E |  | KU
Lease cost: |  |  |  |  |  |  |
Operating lease cost | $ | 21 |  |  | $ | 17 |  |  | $ | 7 |  |  | $ | 9 |
Short-term lease cost | 5 |  |  | 2 |  |  | 1 |  |  | 1 |
Total lease cost | $ | 26 |  |  | $ | 19 |  |  | $ | 8 |  |  | $ | 10 |
The following table provides other key information related to the Registrants' operating leases at September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows from operating leases | $ | 21 |  |  | $ | 17 |  |  | $ | 8 |  |  | $ | 9 |
Right-of-use asset obtained in exchange for new operating lease liabilities | 37 |  |  | 8 |  |  | 3 |  |  | 5 |
Lessee, Operating Lease, Liability, Maturity | The following table provides the total future minimum rental payments for operating leases, as well as a reconciliation of these undiscounted cash flows to the lease liabilities recognized on the Balance Sheets as of September 30, 2019.
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 8 |  |  | $ | 5 |  |  | $ | 2 |  |  | $ | 3 |
2020 | 27 |  |  | 16 |  |  | 6 |  |  | 10 |
2021 | 21 |  |  | 12 |  |  | 5 |  |  | 7 |
2022 | 16 |  |  | 8 |  |  | 3 |  |  | 5 |
2023 | 14 |  |  | 7 |  |  | 3 |  |  | 3 |
2024 | 12 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 25 |  |  | 7 |  |  | 3 |  |  | 3 |
Total | $ | 123 |  |  | $ | 61 |  |  | $ | 25 |  |  | $ | 34 |
Weighted-average discount rate | 3.47 | % |  | 3.97 | % |  | 3.9 | % |  | 4.01 | %
Weighted-average remaining lease term (in years) | 8 |  |  | 5 |  |  | 5 |  |  | 5 |
Current lease liabilities (b) | $ | 25 |  |  | $ | 16 |  |  | $ | 6 |  |  | $ | 9 |
Non-current lease liabilities (b) | 80 |  |  | 39 |  |  | 16 |  |  | 22 |
Right-of-use assets (c) | 97 |  |  | 47 |  |  | 19 |  |  | 27 |
(a) | Represents future minimum lease payments for the remainder of 2019.
(b) | Current lease liabilities are included in "Other Current Liabilities" on the Balance Sheets. Non-current lease liabilities are included in "Other deferred credits and noncurrent liabilities" on the Balance Sheets. The difference between the total future minimum lease payments and the recorded lease liabilities is due to the impact of discounting.
(c) | Right-of-use assets are included in "Other noncurrent assets" on the Balance Sheets.
At December 31, 2018, the total future minimum rental payments for all operating leases were estimated to be:
| PPL |  | LKE |  | LG&E |  | KU
2019 | $ | 26 |  |  | $ | 20 |  |  | $ | 10 |  |  | $ | 10 |
2020 | 21 |  |  | 15 |  |  | 6 |  |  | 9 |
2021 | 15 |  |  | 11 |  |  | 4 |  |  | 7 |
2022 | 13 |  |  | 7 |  |  | 3 |  |  | 4 |
2023 | 8 |  |  | 6 |  |  | 3 |  |  | 3 |
Thereafter | 33 |  |  | 11 |  |  | 4 |  |  | 6 |
Total | $ | 116 |  |  | $ | 70 |  |  | $ | 30 |  |  | $ | 39 |
Lessor, Operating Lease, Payments to be Received, Maturity [Table Text Block] | At September 30, 2019, PPL, LKE, LG&E and KU expect to receive the following fixed lease payments over the remaining term of their operating lease agreements:
| PPL |  | LKE |  | LG&E |  | KU
2019 (a) | $ | 3 |  |  | $ | 2 |  |  | $ | — |  |  | $ | 2 |
2020 | 13 |  |  | 7 |  |  | — |  |  | 7 |
2021 | 10 |  |  | 5 |  |  | 1 |  |  | 4 |
2022 | 4 |  |  | — |  |  | — |  |  | — |
2023 | 4 |  |  | 1 |  |  | — |  |  | — |
2024 | 4 |  |  | — |  |  | — |  |  | — |
Thereafter | 12 |  |  | — |  |  | — |  |  | — |
Total | $ | 50 |  |  | $ | 15 |  |  | $ | 1 |  |  | $ | 13 |
Lease income recognized for the three months ended September 30, 2019 | $ | 6 |  |  | $ | 4 |  |  | $ | 2 |  |  | $ | 2 |
Lease income recognized for the nine months ended September 30, 2019 | $ | 16 |  |  | $ | 10 |  |  | $ | 4 |  |  | $ | 6 |
(a) Represents future minimum lease payments for the remainder of 2019.

X
- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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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. + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of maturity of undiscounted cash flows to be received by lessor on annual basis for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 30 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=119202524&loc=SL77919396-209981 + Details
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