Business Acquisitions (Details) (USD $)	12 Months Ended																							1 Months Ended				1 Months Ended	12 Months Ended																						1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2012 Severance Compensation [Member]	Dec. 31, 2011 Severance Compensation [Member]	Dec. 31, 2012 Early Retirement Deficiency Costs Under Applicable Pension Plans [Member]	Dec. 31, 2011 Early Retirement Deficiency Costs Under Applicable Pension Plans [Member]	Dec. 31, 2012 Separation Benefits [Member]	Dec. 31, 2011 Separation Benefits [Member]	Dec. 31, 2013 United Kingdom Regulated [Member]		Dec. 31, 2012 United Kingdom Regulated [Member]		Dec. 31, 2011 United Kingdom Regulated [Member]		Dec. 31, 2011 United Kingdom Regulated [Member] One Time Termination Benefits Member Specific Employee Class [Member]	Dec. 31, 2012 United Kingdom Regulated [Member] Severance Compensation [Member]	Dec. 31, 2011 United Kingdom Regulated [Member] Severance Compensation [Member]	Dec. 31, 2012 United Kingdom Regulated [Member] Early Retirement Deficiency Costs Under Applicable Pension Plans [Member]	Dec. 31, 2012 United Kingdom Regulated [Member] Outplacement Services [Member]	Dec. 31, 2012 United Kingdom Regulated [Member] Separation Benefits [Member]	Dec. 31, 2011 United Kingdom Regulated [Member] Separation Benefits [Member] Integer	Apr. 30, 2012 Ironwood [Member] Integer		Dec. 31, 2012 Ironwood [Member]		Apr. 30, 2011 WPD Midlands [Member] Integer	Dec. 31, 2011 WPD Midlands [Member]		Dec. 31, 2011 WPD Midlands [Member] 2011 Bridge Facility Costs [Member]		Dec. 31, 2011 WPD Midlands [Member] Foreign Currency Loss On 2011 Bridge Facility [Member]		Dec. 31, 2011 WPD Midlands [Member] Net Hedge Gains Associated With 2011 Bridge Facility [Member]		Dec. 31, 2011 WPD Midlands [Member] Hedge Ineffectiveness [Member]		Dec. 31, 2011 WPD Midlands [Member] UK Stamp Duty Tax [Member]		Dec. 31, 2011 WPD Midlands [Member] Seperation Benefits [Member]		Dec. 31, 2011 WPD Midlands [Member] Other Acquisition Related Adjustments [Member]		Dec. 31, 2011 WPD Midlands [Member] PPL Capital Funding [Member] Foreign Currency Loss On 2011 Bridge Facility [Member]	Dec. 31, 2011 WPD Midlands [Member] PPL WEM [Member] Foreign Currency Loss On 2011 Bridge Facility [Member]	Dec. 31, 2011 WPD Midlands [Member] United Kingdom Regulated [Member]	Dec. 31, 2013 PPL Energy Supply LLC [Member]	Dec. 31, 2012 PPL Energy Supply LLC [Member]	Dec. 31, 2011 PPL Energy Supply LLC [Member]	Apr. 30, 2012 PPL Energy Supply LLC [Member] Ironwood [Member] Integer		Dec. 31, 2012 PPL Energy Supply LLC [Member] Ironwood [Member]
Business Acquisition [Line Items]
Acquisition date																								Apr. 13, 2012				Apr. 01, 2011																							Apr. 13, 2012
Number of units purchased																								2																											2
Number of regulated distribution networks operated by WPD Midlands																												2
Number of end users serviced by purchased company																												5,000,000
Fair Value of Consideration Paid for Acquisition [Abstract]
Aggregate enterprise consideration																								$ 326,000,000				$ 6,600,000,000																							$ 326,000,000
Less: Fair value of long-term debt outstanding assumed through consolidation																								258,000,000	[1]			800,000,000																							258,000,000	[1]
Total cash consideration paid																												5,800,000,000
Less: Funds used to repay pre-acquisition affiliate indebtedness																												1,700,000,000
Plus: Restricted cash debt service reserves																								17,000,000																											17,000,000
Cash consideration paid for equity interests (including working capital adjustments)																								85,000,000				4,100,000,000																							85,000,000
Original amount outstanding of debt assumed																								226,000,000																											226,000,000
Interest rate of debt assumed																								8.857%																											8.857%
Maturity date of debt assumed																								Dec. 31, 2025																											Dec. 31, 2025
Debt service reserve loans																								8,000,000																											8,000,000
Fair value adjustment related to debt																								24,000,000																											24,000,000
Business Acquisition, Purchase Price Allocation [Abstract]
Current assets																													200,000,000	[2]
PP&E																										505,000,000			4,900,000,000																								505,000,000
Intangible assets																													100,000,000
Other noncurrent assets																													100,000,000
Current liabilities																													(400,000,000)	[3]
PPL WEM affiliate indebtedness																													(1,700,000,000)
Long term debt (current and noncurrent)																										(258,000,000)	[4]		(800,000,000)	[3]																							(258,000,000)	[4]
Tolling agreement																										(170,000,000)	[5]																										(170,000,000)	[5]
Other net assets																										8,000,000	[4]																										8,000,000	[4]
Other noncurrent liabilities																													(700,000,000)	[3]
Net identifiable assets acquired																										85,000,000			1,700,000,000																								85,000,000
Goodwill	4,225,000,000	4,158,000,000	4,114,000,000	[6]							3,143,000,000	[6]	3,076,000,000	[6]	3,032,000,000	[6]													2,400,000,000																		2,400,000,000	86,000,000	86,000,000
Net assets acquired																													4,100,000,000
Gross contractual obligation of accounts receivable acquired																													122,000,000
Business Acquisition, Pro Forma Information [Abstract]
Operating Revenues																																															790,000,000
Net Income (Loss) Attributable to PPL Shareowners																																															137,000,000
Operating Revenues - PPL consolidated pro forma (unaudited)																													13,140,000,000
Net Income (Loss) Attributable to PPL Shareowners - PPL consolidated pro forma (unaudited)																													1,800,000,000
Business Acquisition, Pro Forma Information, Pre-tax Nonrecurring Credits (Expenses) [Line Items]
Interest Expense	(1,006,000,000)	(961,000,000)	(898,000,000)								(425,000,000)		(421,000,000)		(391,000,000)																(44,000,000)	[7]					(12,000,000)	[8]										(171,000,000)	(168,000,000)	(174,000,000)
Other Income (Expense) - net	(23,000,000)	(39,000,000)	4,000,000																														(57,000,000)	[9]	55,000,000	[10]			(21,000,000)	[11]								30,000,000	18,000,000	23,000,000
Other operation and maintenance	(2,825,000,000)	(2,835,000,000)	(2,667,000,000)																																						(102,000,000)	[12]						(1,072,000,000)	(1,041,000,000)	(929,000,000)
Other Income (Expense) - net and Other operation and maintenance																																											(77,000,000)	[13]
Foreign currency loss																																													(42,000,000)	(15,000,000)
Separation Benefits - U.K. Regulated Segment
Number of employees terminated																							729
Expected costs to be incurred																		61,000,000		46,000,000		108,000,000
Costs incurred					13,000,000	48,000,000	2,000,000	45,000,000	15,000,000	93,000,000							9,000,000				1,000,000
Accrued severance at beginning of period																		21,000,000
Severance compensation																		13,000,000	48,000,000
Severance paid																		34,000,000	27,000,000
Accrued severance at end of period																			$ 21,000,000

[1] The long-term debt assumed through consolidation consisted of $226 million aggregate principal amount of 8.857% senior secured bonds to be fully repaid by December 31, 2025, plus $8 million of debt service reserve loans, and a $24 million fair value adjustment. See Note 7 for information on the February 2013 exchange of a portion of long-term debt assumed through consolidation.

[2] Includes gross contractual amount of the accounts receivable acquired of $122 million, which approximates fair value.

[3] Represents non-cash activity excluded from the 2011 Statement of Cash Flows.

[4] Represents non-cash activity excluded from the 2012 Statement of Cash Flows.

[5] Prior to the acquisition, PPL EnergyPlus had recorded primarily an intangible asset, which represented its rights to and the related accounting for the tolling agreement with PPL Ironwood, LLC. On the acquisition date, PPL Ironwood, LLC recorded a liability, recognized at fair value, for its obligation to PPL EnergyPlus. The tolling agreement assets of PPL EnergyPlus and the tolling agreement liability of PPL Ironwood, LLC eliminate in consolidation for PPL and PPL Energy Supply as a result of the acquisition, and therefore the agreement is considered effectively settled. The difference between the tolling agreement assets and liability resulted in an insignificant loss on the effective settlement of the agreement.

[6] There were no accumulated impairment losses related to goodwill.

[7] The 2011 Bridge Facility costs, primarily commitment and structuring fees, were incurred to establish a bridge facility for purposes of funding the WPD Midlands acquisition purchase price.

[8] The hedge ineffectiveness includes a combination of ineffectiveness associated with closed out interest rate swaps and a charge recorded as a result of certain interest rate swaps failing hedge effectiveness testing, both associated with the acquisition financing.

[9] The 2011 Bridge Facility was denominated in GBP. The amount includes a $42 million foreign currency loss on PPL Capital Funding's repayment of its 2011 Bridge Facility borrowing and a $15 million foreign currency loss associated with proceeds received on the U.S. dollar-denominated senior notes issued by PPL WEM in April 2011 that were used to repay a portion of PPL WEM's borrowing under the 2011 Bridge Facility.

[10] The repayment of borrowings on the 2011 Bridge Facility was economically hedged to mitigate the effects of changes in foreign currency exchange rates with forward contracts to purchase GBP, which resulted in net hedge gains.

[11] The U.K. stamp duty tax represents a tax on the transfer of ownership of property in the U.K. incurred in connection with the acquisition.

[12] See "Separation Benefits - U.K. Regulated Segment" above.

[13] Primarily includes acquisition-related advisory, accounting and legal fees recorded in "Other Income (Expense) - net" and contract termination costs, rebranding costs and relocation costs recorded in "Other operation and maintenance."