CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Tax effect of foreign currency translation adjustments arising during the period	$ 6	$ 5	$ 1	$ 6
Tax effect of available-for-sale securities arising during the period	(3)	(15)	(9)	(21)
Tax effect of qualifying derivatives arising during the period	(11)	4	(7)	29
Tax effect of defined benefit plans - prior service costs arising during period	4	0	4	0
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period	(36)	2	(36)	2
Tax effect of available-for-sale securities reclassified from accumulated other comprehensive income (loss)	1	1	2	2
Tax effect of qualifying derivatives reclassified from accumulated other comprehensive income (loss)	(24)	5	(20)	1
Tax effect of equity investees' other comprehensive income (loss) reclassified from accumulated other comprehensive income (loss)	0	0	(1)	0
Tax effect of prior service costs reclassified from accumulated other comprehensive income (loss)	0	(1)	0	(2)
Tax effect of net actuarial loss reclassified from accumulated other comprehensive income (loss)	(12)	(8)	(25)	(17)
LG And E And KU Energy LLC [Member]
Tax effect of defined benefit plans - net actuarial gain (loss) arising during period	5	1	5	1
Tax effect of equity investees' other comprehensive income (loss) reclassified from accumulated other comprehensive income (loss)	0	0	1	0
Tax effect of prior service costs reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Tax effect of net actuarial loss reclassified from accumulated other comprehensive income (loss)	$ (1)	$ 0	$ (1)	$ 0