Derivative Instruments and Hedging Activities (Fair Values) (Details) (USD $)
In Millions, unless otherwise specified |
Sep. 30, 2012
|
Dec. 31, 2011
|
Sep. 30, 2011
|
Dec. 31, 2010
|
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Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Net pre-tax gains (losses) included in AOCI related to derivatives not designated as hedging instruments | $ 479 | $ 237 | ||||||||
Accumulated after-tax net gains (losses), excluding net investment hedges, included in AOCI | 231 | 527 | 491 | 695 | ||||||
Derivatives Designated As Hedging Instruments [Member]
|
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Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 120 | [1] | 948 | [1] | ||||||
Liability value | 26 | [1] | 10 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 67 | [1] | 882 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 3 | [1] | ||||||||
Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 1 | [1] | ||||||||
Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 7 | [1] | ||||||||
Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 66 | [1] | 872 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 53 | [1] | 66 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 23 | [1] | 24 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 30 | [1] | 42 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 20 | [1] | 8 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 16 | [1] | 3 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 2 | [1] | 2 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | ||||||||
Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | 3 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 6 | [1] | 2 | [1] | ||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 5 | [1] | ||||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | 2 | [1] | ||||||
Derivatives Not Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 2,508 | [1],[2] | 2,520 | [1],[2] | ||||||
Liability value | 2,042 | [1],[2] | 2,400 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 1,701 | [1],[2] | 1,666 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 11 | [1],[2] | ||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 1,701 | [1],[2] | 1,655 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 807 | [1],[2] | 854 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 807 | [1],[2] | 854 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1,164 | [1],[2] | 1,562 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 5 | [1],[2] | 5 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 19 | [1],[2] | ||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1,140 | [1],[2] | 1,557 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 878 | [1],[2] | 838 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 57 | [1],[2] | 55 | [1],[2] | ||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Cross Currency Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Foreign Currency Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 16 | [1],[2] | ||||||||
Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 805 | [1],[2] | 783 | [1],[2] | ||||||
PPL Energy Supply LLC [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Net pre-tax gains (losses) included in AOCI related to derivatives not designated as hedging instruments | 479 | 237 | ||||||||
Accumulated after-tax net gains (losses), excluding net investment hedges, included in AOCI | 312 | 605 | 539 | 733 | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 96 | [1] | 914 | [1] | ||||||
Liability value | 2 | [1] | 5 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 66 | [1] | 872 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 66 | [1] | 872 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 30 | [1] | 42 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 30 | [1] | 42 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | 3 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | 3 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | 2 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1 | [1] | 2 | [1] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 2,508 | [1],[2] | 2,509 | [1],[2] | ||||||
Liability value | 1,945 | [1],[2] | 2,340 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 1,701 | [1],[2] | 1,655 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 1,701 | [1],[2] | 1,655 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 807 | [1],[2] | 854 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | 807 | [1],[2] | 854 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1,140 | [1],[2] | 1,557 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 1,140 | [1],[2] | 1,557 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 805 | [1],[2] | 783 | [1],[2] | ||||||
PPL Energy Supply LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Commodity Contracts [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 805 | [1],[2] | 783 | [1],[2] | ||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Liability value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Liability value | 62 | [1] | 60 | [1] | ||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 5 | [1] | 5 | [1] | ||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 5 | [1] | 5 | [1] | ||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 57 | [1] | 55 | [1] | ||||||
LG And E And KU Energy LLC [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 57 | [1] | 55 | [1] | ||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Liability value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Liability value | 62 | [1] | 60 | [1] | ||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Assets [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Asset value | ||||||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 5 | [1] | 5 | [1] | ||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Current Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 5 | [1] | 5 | [1] | ||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | 57 | [1] | 55 | [1] | ||||||
Louisville Gas And Electric Co [Member] | Derivatives Not Designated As Hedging Instruments [Member] | Noncurrent Liabilities [Member] | Interest Rate Swaps [Member]
|
||||||||||
Fair Values by Balance Sheet Location [Abstract] | ||||||||||
Liability value | $ 57 | [1] | $ 55 | [1] | ||||||
|