CONSOLIDATED STATEMENTS OF EQUITY (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Vote per share of PPL's common stock	1	1	1
Shares of PPL common stock issued under a public equity offering (in shares)		92.0	103.5
Present value of the purchase Contract component of the Equity Units		$ 123	$ 157
Issuance costs related to the Equity Units allocated to capital in excess of par, net of tax		20	19
Stock-based compensation expense related to new and existing unvested equity awards	47	33	26
Reclassification From Share Based Compensation To Common Stock Issued	$ (29)	$ (23)	$ (18)