Financing Activities (Credit Arrangements) (Details) £ in Millions, $ in Millions		1 Months Ended	12 Months Ended
		Jan. 31, 2016 GBP (£)	Dec. 31, 2015 GBP (£)		Jan. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 GBP (£)		Dec. 31, 2014 USD ($)
PPL Electric [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 28, 2019
Capacity	[1],[2]					$ 300
Letters of credit and commercial paper issued						1			$ 1
Unused capacity						$ 299
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
PPL Electric [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Jan. 29, 2021
Capacity					$ 400
Potential capacity increase					250
LKE [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Oct. 30, 2018
Capacity	[1],[2]					$ 75
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 25
LKE [Member] | Syndicated Credit Facility [Member] | United States of America, Dollars [Member]
Financing Activities [Line Items]
Borrowed	[1],[3]					$ 75			$ 75
Interest rate on outstanding borrowing			1.68%			1.68%	1.67%		1.67%
LGE [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 29, 2019
Capacity	[1],[2]					$ 500
Letters of credit and commercial paper issued						142			$ 264
Unused capacity						$ 358
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
LGE [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Dec. 31, 2020
Potential capacity increase					100
KU [Member]
Financing Activities [Line Items]
Capacity						598
Letters of credit and commercial paper issued						246			434
Unused capacity						352
KU [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 29, 2019
Capacity	[1],[2]					400
Letters of credit and commercial paper issued						48			236
Unused capacity						$ 352
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
KU [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Dec. 31, 2020
Potential capacity increase					100
KU [Member] | Letter Of Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Oct. 01, 2017
Capacity	[1],[2],[4]					198
Letters of credit and commercial paper issued	[4]					$ 198			198
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
UK [Member]
Financing Activities [Line Items]
Capacity | £			£ 1,095
Letters of credit and commercial paper issued | £			4				£ 5
Unused capacity			958	[5]		$ 1,400
UK [Member] | United Kingdom, Pounds [Member]
Financing Activities [Line Items]
Borrowed | £	[5]		133				167
UK [Member] | Uncommitted Credit Facilities [Member]
Financing Activities [Line Items]
Capacity | £			40
Letters of credit and commercial paper issued | £			4				5
Unused capacity | £			£ 36
UK [Member] | WPD PLC [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Dec. 01, 2016
Capacity | £	[1],[6]		£ 210
Unused capacity | £			£ 77
Minimum interest coverage ratio allowed under the credit facility			3.0 times
Maximum percentage of total net debt to RAV allowed under the credit facility			85.00%			85.00%
UK [Member] | WPD PLC [Member] | Syndicated Credit Facility [Member] | New Facility Subsequent To Period End [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Jan. 13, 2021
Capacity | £		£ 210
UK [Member] | WPD PLC [Member] | Syndicated Credit Facility [Member] | Replaced Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Jan. 13, 2021
Capacity | £		£ 210
UK [Member] | WPD PLC [Member] | Syndicated Credit Facility [Member] | United States of America, Dollars [Member]
Financing Activities [Line Items]
Borrowed			£ 133			$ 200	£ 103		$ 161
Interest rate on outstanding borrowing			1.83%			1.83%	1.86%		1.86%
UK [Member] | WPD South West [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 01, 2020
Capacity | £	[1],[6]		£ 245
Unused capacity | £			£ 245
Minimum interest coverage ratio allowed under the credit facility			3.0 times
Maximum percentage of total net debt to RAV allowed under the credit facility			85.00%			85.00%
UK [Member] | WPD East Midlands [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 01, 2020
Capacity | £	[1],[6]		£ 300
Unused capacity | £			£ 300
Minimum interest coverage ratio allowed under the credit facility			3.0 times
Maximum percentage of total net debt to RAV allowed under the credit facility			85.00%			85.00%
UK [Member] | WPD East Midlands [Member] | Syndicated Credit Facility [Member] | United Kingdom, Pounds [Member]
Financing Activities [Line Items]
Borrowed							£ 64	[1],[6]	$ 100
Interest rate on outstanding borrowing							1.00%		1.00%
UK [Member] | WPD West Midlands [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 01, 2020
Capacity | £	[1],[6]		£ 300
Unused capacity | £			£ 300
Minimum interest coverage ratio allowed under the credit facility			3.0 times
Maximum percentage of total net debt to RAV allowed under the credit facility			85.00%			85.00%
US [Member] | PPL Capital Funding [Member]
Financing Activities [Line Items]
Capacity						$ 750
Letters of credit and commercial paper issued						471			$ 21
Unused capacity						279
US [Member] | PPL Capital Funding [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Nov. 12, 2018
Capacity	[1],[2]					300
Letters of credit and commercial paper issued	[1]					151
Unused capacity	[1]					$ 149
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 30
US [Member] | PPL Capital Funding [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Jan. 29, 2021
Capacity					700
Potential capacity increase					250
US [Member] | PPL Capital Funding [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 28, 2019
Capacity	[1],[2]					300
Letters of credit and commercial paper issued	[1]					$ 300
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
US [Member] | PPL Capital Funding [Member] | Bilateral Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Mar. 26, 2016
Capacity	[1],[2]					150
Letters of credit and commercial paper issued	[1]					20			21
Unused capacity	[1]					$ 130
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 30
PPL Electric Utilities Corp [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 28, 2019
Capacity	[1],[2]					300
Letters of credit and commercial paper issued						1			1
Unused capacity						$ 299
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
PPL Electric Utilities Corp [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Jan. 29, 2021
Capacity					400
Potential capacity increase					250
LG And E And KU Energy LLC [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Oct. 30, 2018
Capacity	[1],[2]					$ 75
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 25
LG And E And KU Energy LLC [Member] | Syndicated Credit Facility [Member] | United States of America, Dollars [Member]
Financing Activities [Line Items]
Borrowed	[1],[3]					$ 75			$ 75
Interest rate on outstanding borrowing			1.68%			1.68%	1.67%		1.67%
LG And E And KU Energy LLC [Member] | LGE [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 29, 2019
Capacity	[1],[2]					$ 500
Letters of credit and commercial paper issued						142			$ 264
Unused capacity						$ 358
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
LG And E And KU Energy LLC [Member] | LGE [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Dec. 31, 2020
Potential capacity increase					100
LG And E And KU Energy LLC [Member] | KU [Member]
Financing Activities [Line Items]
Capacity						598
Letters of credit and commercial paper issued						246			434
Unused capacity						352
LG And E And KU Energy LLC [Member] | KU [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 29, 2019
Capacity	[1],[2]					400
Letters of credit and commercial paper issued						48			236
Unused capacity						$ 352
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
LG And E And KU Energy LLC [Member] | KU [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Dec. 31, 2020
Potential capacity increase					100
LG And E And KU Energy LLC [Member] | KU [Member] | Letter Of Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Oct. 01, 2017
Capacity	[1],[2]					198
Letters of credit and commercial paper issued	[4]					$ 198			198
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Louisville Gas And Electric Co [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 29, 2019
Capacity	[1],[2]					$ 500
Letters of credit and commercial paper issued						142			264
Unused capacity						$ 358
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
Louisville Gas And Electric Co [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Dec. 31, 2020
Potential capacity increase					100
Kentucky Utilities Co [Member]
Financing Activities [Line Items]
Capacity						598
Letters of credit and commercial paper issued						246			434
Unused capacity						352
Kentucky Utilities Co [Member] | Syndicated Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Jul. 29, 2019
Capacity	[1],[2]					400
Letters of credit and commercial paper issued						48			236
Unused capacity						$ 352
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%
Potential capacity increase						$ 100
Kentucky Utilities Co [Member] | Syndicated Credit Facility [Member] | Subsequent Event [Member]
Financing Activities [Line Items]
Expiration date		Dec. 31, 2020
Potential capacity increase					$ 100
Kentucky Utilities Co [Member] | Letter Of Credit Facility [Member]
Financing Activities [Line Items]
Expiration date			Oct. 01, 2017
Capacity	[1],[2]					198
Letters of credit and commercial paper issued	[4]					$ 198			$ 198
Maximum percentage of debt to total capitalization allowed under the credit facility			70.00%			70.00%

[1] Each company pays customary fees under its respective facility and borrowings generally bear interest at LIBOR-based rates plus an applicable margin.

[2] The facilities contain a financial covenant requiring debt to total capitalizati on not to exceed 70% for PPL Capital Funding, PPL Electric, LKE, LG&E and KU, as calculated in accordance with the facilities and other customary covenants . Additionally, as it relates to the syndicated and bilateral cre dit facilities and subject to certain conditions, PPL Capital Funding may request that the capacity of its facility expiring in July 2019 be increased by up to $ 100 million and the facilities expiring in November 2018 and March 2016 may be increased by up to $ 30 million, PPL Electric, LG&E and KU each may request up to a $ 100 million increase in its fac ility's capacity and LKE may request up to a $ 25 million increase in its facility's capacity.

[3] At December 31, 2015 , LKE's interest rate on outstanding borrowings was 1.68% . At December 31, 2014 , LKE’s interest rate on outstanding borrowings was 1.67% .

[4] KU's letter of credit facility agreement allows for certain payments under the letter of credit facility to be converted t o loans rather than requiring immediate payment.

[5] WPD plc's amounts borrowed at December 31, 2015 and 2014 were USD-denominated borrowings of $ 200 million and $ 161 million, which bore interest at 1.83% and 1.86% . WPD (East Midlands) amount borrowed at December 31, 2014 was a GBP-denominated borrowing which equated to $ 100 million and bore interest at 1.00% . At December 31, 2015 , the unused capacity under the U.K. credit facilities was approximately $ 1.4 billion .

[6] The facilities contain financial covenants to maintain an interest coverage ratio of not less than 3.0 times consolidated earnings before income taxes, depreciation and amortization and total net debt not in excess of 85% of its RAV, calculated in accordance with the credit facility.