CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Net income	$ 200	$ 92	$ 605	$ 347
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	93	(67)	160	(160)
Available-for-sale securities, net of tax	1	(17)	13	(7)
Qualifying derivatives, net of tax	(30)	(151)	7	226
Equity investees' other comprehensive income (loss)	0	0	(1)	0
Defined benefit plans:
Net actuarial gain, net of tax	0	80	0	80
Reclassifications to net income - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(1)	(2)	(8)	(4)
Qualifying derivatives, net of tax	(89)	(7)	(158)	(67)
Equity investee's other comprehensive income (loss)	1	0	3	0
Defined benefit plans:
Prior service costs, net of tax	2	5	5	7
Net actuarial loss, net of tax	12	7	23	21
Transition obligation, net of tax	0	1	0	2
Total other comprehensive income (loss)	(11)	(151)	44	98
Comprehensive income (loss)	189	(59)	649	445
Comprehensive income attributable to noncontrolling interests	4	7	8	12
Comprehensive income (loss) attributable to PPL Corporation	185	(66)	641	433
PPL Energy Supply [Member]
Net income	89	86	303	286
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	0	(67)	0	(160)
Available-for-sale securities, net of tax	1	(17)	13	(7)
Qualifying derivatives, net of tax	(21)	(97)	29	285
Defined benefit plans:
Net actuarial gain, net of tax	0	80	0	80
Reclassifications to net income - (gains) losses, net of tax expense (benefit):
Available-for-sale securities, net of tax	(1)	(2)	(8)	(4)
Qualifying derivatives, net of tax	(68)	(8)	(147)	(68)
Equity investee's other comprehensive income (loss)	1	0	3	0
Defined benefit plans:
Prior service costs, net of tax	1	4	2	5
Net actuarial loss, net of tax	1	8	2	20
Transition obligation, net of tax	0	1	0	2
Total other comprehensive income (loss)	(86)	(98)	(106)	153
Comprehensive income (loss)	3	(12)	197	439
PPL Electric [Member]
Net income	40	23	96	65
LKE [Member] | Successor [Member]
Net income	41		128
Defined benefit plans:
Total other comprehensive income (loss)			(2)
LKE [Member] | Predecessor [Member]
Net income		32		92
Defined benefit plans:
Total other comprehensive income (loss)		(2)		(1)
LGE [Member] | Successor [Member]
Net income	20		59
LGE [Member] | Predecessor [Member]
Net income		14		47
Defined benefit plans:
Total other comprehensive income (loss)		(2)		(3)
KU [Member] | Successor [Member]
Net income	30		88
Defined benefit plans:
Total other comprehensive income (loss)			(1)
KU [Member] | Predecessor [Member]
Net income		$ 31		$ 75