CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 Integer	Sep. 30, 2012 Integer	Sep. 30, 2013 Integer	Sep. 30, 2012 Integer
Vote per share of PPL's common stock	1	1	1	1
Stock-based compensation expense related to new and existing unvested equity awards	$ 8	$ 7	$ 44	$ 42
Reclassifications from Stock-based compensation to Common stock issued	$ (3)	$ (2)	$ (21)	$ (14)