Financing Activities (Long-term Debt and Equity Securities) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended		1 Months Ended			9 Months Ended		1 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended			9 Months Ended		1 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	May 31, 2014 Purchase Contacts 2011 [Member]	Aug. 31, 2014 PPL Energy Supply [Member] Senior Unsecured Notes [Member]	Jun. 30, 2014 PPL Electric [Member] First Mortgage Bond [Member]	Sep. 30, 2014 PPL Electric [Member] First Mortgage Bond [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Remarketed [Member] Junior Subordinated Notes [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Junior Subordinated Notes [Member]	Sep. 30, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Remarketed [Member] Junior Subordinated Notes [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Remarketed [Member] Junior Subordinated Notes [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Junior Subordinated Notes [Member]	Sep. 30, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Junior Subordinated Notes [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Junior Subordinated Notes [Member]	Sep. 30, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Junior Subordinated Notes [Member]	Sep. 30, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Senior Unsecured Notes [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Senior Unsecured Notes [Member]	Sep. 30, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Senior Unsecured Notes [Member]	Mar. 31, 2014 PPL Capital Funding [Member] Equity Units 2011 [Member] Exchanged [Member] Senior Unsecured Notes [Member]	Aug. 31, 2014 PPL Energy Supply LLC [Member] Senior Unsecured Notes [Member]	Jun. 30, 2014 PPL Electric Utilities Corp [Member] First Mortgage Bond [Member]	Sep. 30, 2014 PPL Electric Utilities Corp [Member] First Mortgage Bond [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount					$ 300					$ 978	$ 350		$ 400			$ 350		$ 400		$ 300
Stated interest rate				5.40%	4.125%					4.32%	2.189%		3.184%			3.95%		5.00%	5.40%	4.125%
Maturity date						Jun. 15, 2044			May 01, 2019			Mar. 15, 2017		Mar. 15, 2019	Mar. 15, 2024		Mar. 15, 2044				Jun. 15, 2044
Portion of total principal settled in cash							228
Principal amount extinguished											350		400
Proceeds from issuance of secured debt					294															294
Repayments of senior notes				300															300
Gain (loss) on extinguishment of debt								(9)
Equity Securities (Numeric) [Abstract]
Repurchase of common stock due to the repurchase program	0	74
Shares of PPL common stock issued			31.7
Price per share of PPL common stock issued			$ 30.86
Net cash received on stock transaction			$ 978