Financing Activities (Credit Arrangements) (Details) In Millions, unless otherwise specified	3 Months Ended				3 Months Ended								3 Months Ended						3 Months Ended		3 Months Ended				3 Months Ended				3 Months Ended				3 Months Ended		3 Months Ended				3 Months Ended				3 Months Ended														3 Months Ended						3 Months Ended		3 Months Ended				3 Months Ended						3 Months Ended				3 Months Ended		3 Months Ended		3 Months Ended				3 Months Ended		3 Months Ended
	Mar. 31, 2014 PPL WW [Member] Syndicated Credit Facility [Member]	Dec. 31, 2013 PPL WW [Member] Syndicated Credit Facility [Member]	Mar. 31, 2014 PPL WW [Member] Syndicated Credit Facility [Member] USD Denominated Borrowing [Member] USD ($)	Dec. 31, 2013 PPL WW [Member] Syndicated Credit Facility [Member] USD Denominated Borrowing [Member] USD ($)	Mar. 31, 2014 WPD South West [Member] Syndicated Credit Facility [Member]	Mar. 31, 2014 WPD East Midlands [Member] Syndicated Credit Facility [Member]	Mar. 31, 2014 WPD West Midlands [Member] Syndicated Credit Facility [Member]	Mar. 31, 2014 WPD [Member] USD ($)	Mar. 31, 2014 PPL Capital Funding [Member] Syndicated Credit Facility [Member]	Dec. 31, 2013 PPL Capital Funding [Member] Syndicated Credit Facility [Member]	Mar. 31, 2014 PPL Energy Supply [Member] USD ($)	Dec. 31, 2013 PPL Energy Supply [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply [Member] Syndicated Credit Facility [Member] USD ($)		Dec. 31, 2013 PPL Energy Supply [Member] Syndicated Credit Facility [Member] USD ($)		Mar. 31, 2014 PPL Energy Supply [Member] Uncommitted Credit Facilities [Member] USD ($)	Dec. 31, 2013 PPL Energy Supply [Member] Uncommitted Credit Facilities [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply [Member] Letter Of Credit Facility [Member] USD ($)	Dec. 31, 2013 PPL Energy Supply [Member] Letter Of Credit Facility [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply [Member] Facility Agreement [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply [Member] Secured Trading Facility [Member] USD ($) Integer	Mar. 31, 2014 PPL Electric [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 PPL Electric [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 LKE [Member] Syndicated Credit Facility [Member] USD ($)		Dec. 31, 2013 LKE [Member] Syndicated Credit Facility [Member] USD ($)		Mar. 31, 2014 LGE [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 LGE [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 KU [Member] USD ($)	Dec. 31, 2013 KU [Member] USD ($)	Mar. 31, 2014 KU [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 KU [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 KU [Member] Letter Of Credit Facility [Member] USD ($)	Dec. 31, 2013 KU [Member] Letter Of Credit Facility [Member] USD ($)	Mar. 31, 2014 United States [Member] USD ($)	Dec. 31, 2013 United States [Member] USD ($)	Mar. 31, 2014 United States [Member] Syndicated Credit Facility [Member] USD ($)		Dec. 31, 2013 United States [Member] Syndicated Credit Facility [Member] USD ($)		Mar. 31, 2014 United States [Member] Bilateral Credit Facility [Member] USD ($)	Mar. 31, 2014 United Kingdom [Member] GBP (£)		Dec. 31, 2013 United Kingdom [Member] GBP (£)		Mar. 31, 2014 United Kingdom [Member] PPL WW [Member] Syndicated Credit Facility [Member] GBP (£)	Dec. 31, 2013 United Kingdom [Member] PPL WW [Member] Syndicated Credit Facility [Member] GBP (£)	Mar. 31, 2014 United Kingdom [Member] WPD South West [Member] Syndicated Credit Facility [Member] GBP (£)	Mar. 31, 2014 United Kingdom [Member] WPD East Midlands [Member] Syndicated Credit Facility [Member] GBP (£)	Mar. 31, 2014 United Kingdom [Member] WPD West Midlands [Member] Syndicated Credit Facility [Member] GBP (£)	Mar. 31, 2014 United Kingdom [Member] WPD [Member] Uncommitted Credit Facilities [Member] GBP (£)	Dec. 31, 2013 United Kingdom [Member] WPD [Member] Uncommitted Credit Facilities [Member] GBP (£)	Mar. 31, 2014 PPL Energy Supply LLC [Member] USD ($)	Dec. 31, 2013 PPL Energy Supply LLC [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply LLC [Member] Syndicated Credit Facility [Member] USD ($)		Dec. 31, 2013 PPL Energy Supply LLC [Member] Syndicated Credit Facility [Member] USD ($)		Mar. 31, 2014 PPL Energy Supply LLC [Member] Uncommitted Credit Facilities [Member] USD ($)	Dec. 31, 2013 PPL Energy Supply LLC [Member] Uncommitted Credit Facilities [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply LLC [Member] Letter Of Credit Facility [Member] USD ($)	Dec. 31, 2013 PPL Energy Supply LLC [Member] Letter Of Credit Facility [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply LLC [Member] Facility Agreement [Member] USD ($)	Mar. 31, 2014 PPL Energy Supply LLC [Member] Secured Trading Facility [Member] USD ($) Integer	Mar. 31, 2014 PPL Electric Utilities Corp [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 PPL Electric Utilities Corp [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 LG And E And KU Energy LLC [Member] Syndicated Credit Facility [Member] USD ($)		Dec. 31, 2013 LG And E And KU Energy LLC [Member] Syndicated Credit Facility [Member] USD ($)		Mar. 31, 2014 LG And E And KU Energy LLC [Member] LKE [Member] Syndicated Credit Facility [Member]	Dec. 31, 2013 LG And E And KU Energy LLC [Member] LKE [Member] Syndicated Credit Facility [Member]	Mar. 31, 2014 LG And E And KU Energy LLC [Member] LGE [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 LG And E And KU Energy LLC [Member] LGE [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 LG And E And KU Energy LLC [Member] KU [Member] USD ($)	Dec. 31, 2013 LG And E And KU Energy LLC [Member] KU [Member] USD ($)	Mar. 31, 2014 LG And E And KU Energy LLC [Member] KU [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 LG And E And KU Energy LLC [Member] KU [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 LG And E And KU Energy LLC [Member] KU [Member] Letter Of Credit Facility [Member] USD ($)	Dec. 31, 2013 LG And E And KU Energy LLC [Member] KU [Member] Letter Of Credit Facility [Member] USD ($)	Mar. 31, 2014 Louisville Gas And Electric Co [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 Louisville Gas And Electric Co [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 Kentucky Utilities Co [Member] USD ($)	Dec. 31, 2013 Kentucky Utilities Co [Member] USD ($)	Mar. 31, 2014 Kentucky Utilities Co [Member] Syndicated Credit Facility [Member] USD ($)	Dec. 31, 2013 Kentucky Utilities Co [Member] Syndicated Credit Facility [Member] USD ($)	Mar. 31, 2014 Kentucky Utilities Co [Member] Letter Of Credit Facility [Member] USD ($)	Dec. 31, 2013 Kentucky Utilities Co [Member] Letter Of Credit Facility [Member] USD ($)
Financing Activities [Line Items]
Expiration date	Dec. 21, 2016				Jan. 12, 2017	Apr. 16, 2016	Apr. 16, 2016						Nov. 06, 2017						Mar. 19, 2015		Jun. 30, 2017	Nov. 03, 2018	Oct. 18, 2017		Oct. 31, 2018				Nov. 06, 2017				Nov. 06, 2017		May 01, 2016				Nov. 12, 2018				Mar. 26, 2015														Nov. 06, 2017						Mar. 19, 2015		Jun. 30, 2017	Nov. 03, 2018	Oct. 18, 2017		Oct. 31, 2018						Nov. 06, 2017				Nov. 06, 2017		May 01, 2016		Nov. 06, 2017				Nov. 06, 2017		May 01, 2016
Capacity											$ 3,325		$ 3,000	[1]			$ 175		$ 150				$ 300		$ 75	[1]			$ 500		$ 598		$ 400		$ 198		$ 450		$ 300	[1]			$ 150	£ 1,143	[2]			£ 210		£ 245	£ 300	£ 300	£ 88		$ 3,325		$ 3,000	[1]			$ 175		$ 150				$ 300		$ 75	[1]					$ 500		$ 598		$ 400		$ 198		$ 500		$ 598		$ 400		$ 198
Borrowed			164	166							350		350	[1]											75	[1]	75	[1]									185	270	185	[1]	270	[1]		98	[2]	103	[2]	98	103						350		350	[1]											75	[1]	75	[1]
Letters of credit and commercial paper issued											898	244	730	[1]	29	[1]	77	77	91	138			61	21					15	20	308	348	110	150	198	198								5	[2]	5	[2]						5	5	898	244	730	[1]	29	[1]	77	77	91	138			61	21							15	20	308	348	110	150	198	198	15	20	308	348	110	150	198	198
Unused capacity								1,700			2,077		1,920	[1]			98		59				239						485		290		290				265		115	[1]			150	1,040	[2]			112		245	300	300	83		2,077		1,920	[1]			98		59				239								485		290		290				485		290		290
Interest rate on outstanding borrowing	1.86%	1.87%							1.79%	1.79%			1.66%												1.66%		1.67%																														1.66%																1.66%	1.67%
Potential maximum Facility Agreement capacity																					500																																												500
Secured energy marketing and trading facility capacity																						$ 800																																												$ 800
Automatic renewal term (in years)																						1																																												1

[1] At March 31, 2014, interest rates on outstanding borrowings were 1.79% for PPL Capital Funding and 1.66% for PPL Energy Supply and LKE. At December 31, 2013, interest rates on outstanding borrowings were 1.79% for PPL Capital Funding and 1.67% for LKE.

[2] PPL WW's amounts borrowed at March 31, 2014 and December 31, 2013 were USD-denominated borrowings of $164 million and $166 million, which equated to £98 million and £103 million at the time of borrowings and bore interest at 1.86% and 1.87%. At March 31, 2014, the unused capacity under the U.K. credit facilities was $1.7 billion.