CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Tax effect of foreign currency translation adjustments arising during the period	$ 4	$ 2	$ (2)
Tax effect of available-for-sale securities arising during the period	(72)	(31)	(6)
Tax effect of qualifying derivatives arising during the period	(41)	(32)	(139)
Tax effect of equity investees' other comprehensive income (loss) arising during the period	0	(1)	0
Tax effect of defined benefit plans - prior service costs arising during period	(1)	0	(1)
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period	(73)	343	58
Tax effect of available-for-sale securities reclassified to net income	4	1	5
Tax effect of qualifying derivatives reclassified to net income	80	278	246
Tax effect of equity investees' other comprehensive (income) loss reclassified to net income	0	0	0
Tax effect of prior service costs reclassified to net income	(4)	(5)	(5)
Tax effect of net actuarial loss reclassified to net income	49	29	19
PPL Energy Supply LLC [Member]
Tax effect of available-for-sale securities arising during the period	(72)	(31)	(6)
Tax effect of qualifying derivatives arising during the period	0	(46)	(164)
Tax effect of defined benefit plans - prior service costs arising during period	(1)	0	(2)
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period	(49)	56	13
Tax effect of available-for-sale securities reclassified to net income	4	1	5
Tax effect of qualifying derivatives reclassified to net income	84	291	242
Tax effect of equity investees' other comprehensive (income) loss reclassified to net income	0	0	0
Tax effect of prior service costs reclassified to net income	(3)	(2)	(3)
Tax effect of net actuarial loss reclassified to net income	10	2	2
LG And E And KU Energy LLC [Member]
Tax effect of equity investees' other comprehensive income (loss) arising during the period	0	(1)	0
Tax effect of defined benefit plans - prior service costs arising during period	0	0	1
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period	(18)	13	(1)
Tax effect of net actuarial loss reclassified to net income	$ 0	$ 0	$ 1