CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 Integer	Jun. 30, 2011 Integer	Jun. 30, 2012 Integer	Jun. 30, 2011 Integer
Vote per share of PPL's common stock	1	1	1	1
Shares of PPL common stock issued under a public equity offering (in shares)	92.0	103.5	92.0	103.5
Present value of the purchase Contract component of the Equity Units	$ 123	$ 157	$ 123	$ 157
Issuance costs related to the Equity Units allocated to capital in excess of par, net of tax	18	29	18	19
Amount paid to redeem PPL Electric's preferred stock which was reflected as Non-controlling Interest by PPL			250	0
Stock-based compensation expense related to new and existing unvested equity awards	6	5	35	22
Reclassifications from Stock-based compensation to Common stock issued			(12)	(21)
PPL Electric Utilities Corp [Member]
Amount paid to redeem PPL Electric's preferred stock which was reflected as Non-controlling Interest by PPL			$ 250	$ 0