Financing Activities (LT Debt and Equity Securities) (Details)	1 Months Ended	3 Months Ended		6 Months Ended		1 Months Ended	6 Months Ended	1 Months Ended					6 Months Ended	1 Months Ended	6 Months Ended		1 Months Ended										6 Months Ended
	Apr. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2010 USD ($)	Apr. 30, 2011 US [Member] Junior Subordinated Notes [Member] PPL Capital Funding 2019 Junior Subordinated Notes [Member] USD ($)	Jun. 30, 2011 US [Member] Junior Subordinated Notes [Member] PPL Capital Funding 2019 Junior Subordinated Notes [Member] USD ($)	Jan. 31, 2011 US [Member] Variable Rate Exempt Facilities Notes [Member] Certain LGE Variable Rate Tax Exempt Revenue Bonds [Member] USD ($)	Jul. 31, 2011 US [Member] Subsequent To Period End Activity [Member] PPL Energy Supply 2046 Senior Secured Notes [Member] USD ($)	Jul. 31, 2011 US [Member] Subsequent To Period End Activity [Member] PPL Electric 2041 First Mortgage Bonds [Member] USD ($)	Jul. 31, 2011 US [Member] Subsequent To Period End Activity [Member] PPL Electric 2013 Senior Secured Bonds [Member] USD ($)	Apr. 30, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (East Midlands) Assumed Senior Notes [Member] GBP (£)	Jun. 30, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (East Midlands) Assumed Senior Notes [Member]	Apr. 30, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (West Midlands) Assumed Senior Notes [Member] GBP (£)	Jun. 30, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (West Midlands) Assumed Senior Notes [Member]	Apr. 30, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (East And West Midlands) Combined Assumed Senior Notes [Member] USD ($)	Apr. 30, 2011 UK [Member] Senior Unsecured Notes [Member] PPL WEM 2016 Senior Notes [Member] USD ($)	Apr. 30, 2011 UK [Member] Senior Unsecured Notes [Member] PPL WEM 2021 Senior Notes [Member] USD ($)	Apr. 30, 2011 UK [Member] Senior Unsecured Notes [Member] PPL WEM Combined Senior Notes [Member] USD ($)	May 31, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (West Midlands) 2032 Senior Unsecured Notes [Member] GBP (£)	May 31, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (East Midlands) 2023 Senior Unsecured Notes [Member] GBP (£)	May 31, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (West Midlands) And WPD (East Midlands) Combined Senior Unsecured Notes [Member] USD ($)	May 31, 2011 UK [Member] Senior Unsecured Notes [Member] WPD (West Midlands) And WPD (East Midlands) Combined Senior Unsecured Notes [Member] GBP (£)	Jun. 30, 2011 UK [Member] Index-Linked Senior Unsecured Note [Member] WPD (East Midlands) 2043 Index Linked Notes [Member] USD ($)	Jun. 30, 2011 UK [Member] Index-Linked Senior Unsecured Note [Member] WPD (East Midlands) 2043 Index Linked Notes [Member] GBP (£)	Apr. 30, 2011 Equity Units 2011 [Member] USD ($) EquityUnits	Jun. 30, 2011 Equity Units 2011 [Member] USD ($)
Long-term Debt Details
Principal amount								$ 163,000,000		$ 250,000,000		£ 250,000,000		£ 250,000,000		$ 800,000,000	$ 460,000,000	$ 500,000,000		£ 800,000,000	£ 600,000,000				£ 100,000,000
Stated interest rate (in hundreths)							4.32%		7.00%	5.20%	7.125%						3.90%	5.375%		5.75%	5.25%
Maturity Date (in year)							2019		2046	2041	2013	2040		2025			2016	2021		2032	2023			2043	2043
Net proceeds from issuance of unsecured debt																			953,000,000			2,200,000,000	1,400,000,000	163,000,000	99,000,000
Number of tranches that will result from an expected remarketing							2
Minimum aggregate principal amount of each tranche when remarketing occurs							250,000,000
Minimum percentage of a tranche of the total when a remarketing occurs							50.00%
Number of tranches that will mature on or about third anniversary of the remarketing							1
Number of times and periods over which interest may be deferred							one or more times
Proceeds from Equity Units allocated to long-term debt based on fair value						978,000,000
Principal amount of notes repurchased									250,000,000		400,000,000
Payment for the repurchase of notes											458,000,000
Earliest date the company may redeem the debt							May 01, 2016
Interest rate at the end of the period (in hundredths)													5.75%		6.00%
Interest rate at end of period on remarketed debt (in hundredths)								1.90%
Issuance date										July 2011							April 2011	April 2011		May 2011	May 2011			June 2011	June 2011
Proceeds from issuance of secured debt										246,000,000
Maximum interest rate, in hundreths, under adjustment provisioins													6.50%		6.25%
Portion of Issuance proceeds used to repay short-term debt								163,000,000
Equity Securities (Numeric)
Stock issuance date				April 2011
Shares of PPL common stock issued under a public equity offering (in shares)	92,000,000	92,000,000	103,500,000	92,000,000	103,500,000
Price per share of PPL common stock issued under a public equity offering	$ 25.30
Total gross increase in equity from issuance of PPL common stock issued under an equity offering	2,328,000,000
Net proceeds from issuance of PPL common stock issued under an equity offering	2,258,000,000
Underwriting discount related to equity offering	70,000,000
Equity Units Numeric [Abstract]
Equity unit issuance date																											April 2011
Number of equity units sold (in units)																										19,550,000
Stated price per Equity Unit																										50.00
Aggregate value of all Equity Units																										978,000,000
Net proceeds from issuance of Equity Units																										948,000,000
Underwriting discount related to issuance of equity units																										30,000,000
Undivided beneficial ownership, in hundreths, in debt initially associated with Equity Units																											5.00%
Principal amount of PPL Capital Funding Junior Subordinated Notes that an Equity Unit holder has an interest																											1,000
Dollar value of PPL common stock that the holder of Equity Unit is required to purchase																											50.00
Number of trading days included in the calculation of average VWAP																											20
Maximum average VWAP (in dollars per share)																											$ 30.99
The number of shares of PPL common stock to be issued under each purchase contract at maximum VWAP																											1.6133
Total shares of PPL common stock to be issued under Purchase Contract at maximum VWAP or higher																											31,540,015
Range of average VWAP in middle tier of Purchase Contract settlement calculation																											less than approximately $30.99 but greater than $25.30
Minimum average VWAP (in dollars per share)																											$ 25.30
Number of shares of PPL common stock to be issued to each Purchase Contract holder at minimum VWAP																											1.9763
Total shares of PPL common stock to be issued under Purchase Contract at minimum VWAP or lower				86,552,565																							38,636,665
Number of shares of PPL common stock to be issued to each holder if settled early																											1.6133
Rate on Purchase Contract component of Equity Units																											4.43%
Rate on Purchase Contract component of Equity Units on deferred contract adjustment payments																											8.75%
Present value of the Purchase Contract component of the Equity Units		123,000,000	157,000,000	123,000,000	157,000,000
Equity Units underwriting discount and issuance costs allocated to equity																											25,000,000
Equity Units underwriting discount and issuance costs allocated to debt																											$ 5,000,000
Maximum Equity Unit purchase contract component settlement date																											May 1, 2014