Derivative Instruments and Hedging Activities (Gains and Losses) (Details) (USD $) In Millions, unless otherwise specified			12 Months Ended																																																																		12 Months Ended																																																	12 Months Ended				2 Months Ended	12 Months Ended		2 Months Ended	12 Months Ended		2 Months Ended	12 Months Ended		10 Months Ended					12 Months Ended				2 Months Ended	12 Months Ended		2 Months Ended	12 Months Ended		2 Months Ended	12 Months Ended		10 Months Ended			12 Months Ended
	Dec. 31, 2012		Dec. 31, 2012 Fair Value Hedges [Member] Interest Rate Swaps [Member]	Dec. 31, 2011 Fair Value Hedges [Member] Interest Rate Swaps [Member]	Dec. 31, 2010 Fair Value Hedges [Member] Interest Rate Swaps [Member]	Dec. 31, 2012 Fair Value Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 Fair Value Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 Fair Value Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 Fair Value Hedges [Member] Interest Rate Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2012 Cash Flow Hedges [Member]	Dec. 31, 2011 Cash Flow Hedges [Member]	Dec. 31, 2010 Cash Flow Hedges [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Other Comprehensive Income [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Other Comprehensive Income [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Other Comprehensive Income [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Other Comprehensive Income [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Other Comprehensive Income [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Other Comprehensive Income [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Interest Rate Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Other Comprehensive Income [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Other Comprehensive Income [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Other Comprehensive Income [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Interest Expense [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Cross Currency Swaps [Member] Other Income (Expense) Net [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Commodity Contracts [Member] Other Comprehensive Income [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Commodity Contracts [Member] Other Comprehensive Income [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Commodity Contracts [Member] Other Comprehensive Income [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Commodity Contracts [Member] Depreciation [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Commodity Contracts [Member] Depreciation [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Commodity Contracts [Member] Depreciation [Member]	Dec. 31, 2012 Cash Flow Hedges [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2011 Cash Flow Hedges [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2010 Cash Flow Hedges [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Regulatory Assets Noncurrent [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Regulatory Assets Noncurrent [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Unregulated Retail Electric And Gas [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Unregulated Retail Electric And Gas [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Unregulated Retail Electric And Gas [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Net Energy Trading Margins [Member]		Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Net Energy Trading Margins [Member]		Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Net Energy Trading Margins [Member]		Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Utility [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Utility [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Utility [Member]	Dec. 31, 2012 Derivatives Not Designated As Hedging Instruments [Member] Foreign Currency Contracts [Member] Other Income (Expense) Net [Member]	Dec. 31, 2011 Derivatives Not Designated As Hedging Instruments [Member] Foreign Currency Contracts [Member] Other Income (Expense) Net [Member]	Dec. 31, 2010 Derivatives Not Designated As Hedging Instruments [Member] Foreign Currency Contracts [Member] Other Income (Expense) Net [Member]	Dec. 31, 2012 Net Investment Hedges [Member] Foreign Currency Contracts [Member] Other Comprehensive Income [Member]	Dec. 31, 2011 Net Investment Hedges [Member] Foreign Currency Contracts [Member] Other Comprehensive Income [Member]	Dec. 31, 2010 Net Investment Hedges [Member] Foreign Currency Contracts [Member] Other Comprehensive Income [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member]		Dec. 31, 2011 PPL Energy Supply LLC [Member] Fair Value Hedges [Member] Interest Rate Swaps [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Fair Value Hedges [Member] Interest Rate Swaps [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Fair Value Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Fair Value Hedges [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Interest Rate Swaps [Member] Discontinued Operations [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Cross Currency Swaps [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Cross Currency Swaps [Member] Discontinued Operations [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Depreciation [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Depreciation [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Depreciation [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Cash Flow Hedges [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Wholesale Energy Marketing [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Fuel [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Energy Purchases [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Unregulated Retail Electric And Gas [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Unregulated Retail Electric And Gas [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Unregulated Retail Electric And Gas [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Net Energy Trading Margins [Member]		Dec. 31, 2011 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Net Energy Trading Margins [Member]		Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Net Energy Trading Margins [Member]		Dec. 31, 2010 PPL Energy Supply LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Foreign Currency Contracts [Member] Discontinued Operations [Member]	Dec. 31, 2010 PPL Energy Supply LLC [Member] Net Investment Hedges [Member] Foreign Currency Contracts [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member]		Dec. 31, 2012 LG And E And KU Energy LLC [Member] Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Regulatory Assets Noncurrent [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Regulatory Assets Noncurrent [Member]	Dec. 31, 2010 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2010 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Dec. 31, 2012 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Dec. 31, 2011 LG And E And KU Energy LLC [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Oct. 31, 2010 LG And E And KU Energy LLC [Member] Predecessor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Oct. 31, 2010 LG And E And KU Energy LLC [Member] Predecessor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Oct. 31, 2010 LG And E And KU Energy LLC [Member] Predecessor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member]		Dec. 31, 2012 Louisville Gas And Electric Co [Member] Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member] Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Regulatory Assets Noncurrent [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Regulatory Assets Noncurrent [Member]	Dec. 31, 2010 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Dec. 31, 2010 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Dec. 31, 2010 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Dec. 31, 2012 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Dec. 31, 2011 Louisville Gas And Electric Co [Member] Successor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Oct. 31, 2010 Louisville Gas And Electric Co [Member] Predecessor [Member] Derivatives Not Designated As Hedging Instruments [Member]	Oct. 31, 2010 Louisville Gas And Electric Co [Member] Predecessor [Member] Derivatives Not Designated As Hedging Instruments [Member] Interest Rate Swaps [Member] Interest Expense [Member]	Oct. 31, 2010 Louisville Gas And Electric Co [Member] Predecessor [Member] Derivatives Not Designated As Hedging Instruments [Member] Commodity Contracts [Member] Operating Revenues [Member]	Dec. 31, 2012 Kentucky Utilities Co [Member] Cash Flow Hedges [Member] Interest Rate Swaps [Member] Regulatory Liabilities Noncurrent [Member]
Amounts Included in Income, OCI or Regulatory Assets [Abstract]
Hedged items in fair value hedging relationships			Fixed rate debt	Fixed rate debt	Fixed rate debt																																																																																		Fixed rate debt	Fixed rate debt
Gain (loss) recognized in income on derivative							$ 2	$ 48																																										$ 204	$ 201	$ (450)			$ (8)	$ (8)		$ 1,191	$ 1,606	$ (70)		$ (1)	$ 12	$ (965)	$ (1,493)	$ (405)	$ 30	$ 39	$ 11	$ 8	[1]	$ (6)	[1]	$ 1	[1]		$ (1)	$ (2)	$ (52)	$ 65	$ 3																														$ 264	$ 145	$ (448)	$ 1,191	$ 1,606	$ (70)		$ (1)	$ 12	$ (965)	$ (1,493)	$ (405)	$ 30	$ 39	$ 11	$ 8	[2]	$ (6)	[2]	$ 1	[2]	$ 3								$ (3)	$ (8)	$ (9)	$ (1)	$ (8)	$ (8)	$ (2)		$ (1)	$ (4)	$ (7)	$ 3							$ (3)	$ (8)	$ (9)	$ (1)	$ (8)	$ (8)	$ (2)		$ (1)	$ (4)	$ (7)	$ 3
Gain (loss) recognized as regulatory liabilities/assets																14																																					1	(26)																																																																																		14		1	(26)															7		1	(26)													7
Gain (loss) recognized in income on related item						3	25	(6)	22																																																																																2	2
Gain (loss) recognized in OCI on derivative (effective portion)													71	341	367			(28)	(55)	(145)							(15)	(35)	25							114	431	487																																												(7)	6	5							114	431	512		25		114	431	487																																		5
Gain (loss) reclassified from AOCI into income on derivative (effective portion)										712	616	210									(18)	(13)	(4)	1		(30)				(2)	5	2	(23)	29	16				891	835	680	1	2	2	2	2	(139)	(243)	(458)																																										754	595	244			18				891	835	680	1	2	2	2	2	(139)	(243)	(458)
Gain (loss) recognized in income on derivative (ineffective portion and amount excluded from effectiveness testing)										(3)	(51)	(215)										(13)	(17)																(1)	(39)	(201)						(2)	1	3																																										(3)	(38)	(201)	(3)						(1)	(39)	(201)						(2)	1	3
Credit Risk-Related Contingent Features [Abstract]
Aggregate fair value of derivative instruments in a net liability position with credit risk-related contingent provisions	219																																																																																				142																																																	39																		39
Aggregate fair value of collateral posted on these derivative instruments	39																																																																																				7																																																	32																		32
Aggregate fair value of additional collateral requirements in the event of a credit downgrade below investment grade	$ 202	[3]																																																																																			$ 155	[3]																																																$ 9	[3]																	$ 9	[3]

[1] Differs from the Statement of Income due to intra-month transactions that PPL defines as spot activity, which is not accounted for as a derivative.

[2] Differs from the Statement of Income due to intra-month transactions that PPL Energy Supply defines as spot activity, which is not accounted for as a derivative.

[3] Includes the effect of net receivables and payables already recorded on the Balance Sheet.