CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Share data in Thousands, unless otherwise specified	12 Months Ended									2 Months Ended	12 Months Ended	10 Months Ended	12 Months Ended	2 Months Ended	12 Months Ended	10 Months Ended	12 Months Ended	2 Months Ended	12 Months Ended	10 Months Ended	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 PPL Energy Supply [Member]	Dec. 31, 2010 PPL Energy Supply [Member]	Dec. 31, 2009 PPL Energy Supply [Member]	Dec. 31, 2011 PPL Electric [Member]	Dec. 31, 2010 PPL Electric [Member]	Dec. 31, 2009 PPL Electric [Member]	Dec. 31, 2010 LKE [Member] Successor [Member]	Dec. 31, 2011 LKE [Member] Successor [Member]	Oct. 31, 2010 LKE [Member] Predecessor [Member]	Dec. 31, 2009 LKE [Member] Predecessor [Member]	Dec. 31, 2010 LGE [Member] Successor [Member]	Dec. 31, 2011 LGE [Member] Successor [Member]	Oct. 31, 2010 LGE [Member] Predecessor [Member]	Dec. 31, 2009 LGE [Member] Predecessor [Member]	Dec. 31, 2010 KU [Member] Successor [Member]	Dec. 31, 2011 KU [Member] Successor [Member]	Oct. 31, 2010 KU [Member] Predecessor [Member]	Dec. 31, 2009 KU [Member] Predecessor [Member]
Operating Revenues
Utility	$ 6,292	$ 3,668	$ 3,902
Retail electric							1,881	2,448	3,218					233	1,281	978	1,171	261	1,512	1,235	1,334
Unregulated retail electric and gas	726	415	152	727	415	152
Wholesale energy marketing
Realized	3,807	4,832	3,184	3,807	4,832	3,184
Unrealized economic activity	1,407	(805)	(229)	1,407	(805)	(229)
Wholesale energy marketing to affiliates				26	320	1,806
Electric revenue from affiliates							11	7	74					21	83	79	101	2	36	13	21
Net energy trading margins	(2)	2	17	(2)	2	17
Energy-related businesses	507	409	423	464	364	379
Total Operating Revenues	12,737	8,521	7,449	6,429	5,128	5,309	1,892	2,455	3,292	494	2,793	2,214	2,501	254	1,364	1,057	1,272	263	1,548	1,248	1,355
Operation
Fuel	1,946	1,235	920	1,080	1,096	920				138	866	723	762	60	350	306	328	78	516	417	434
Energy purchases - realized	2,130	2,773	2,625	1,160	1,636	2,512	738	1,075	114	68	238	211	379	61	209	142	281	7	29	68	98
Energy purchases - unrealized economic activity	1,123	(286)	155	1,123	(286)	155
Energy purchases from affiliates				3	3	70	26	320	1,806					2	36	13	21	21	83	79	101
Other operation and maintenance	2,667	1,756	1,418	929	979	921	530	502	417	141	751	586	647	67	363	281	323	65	362	271	306
Amortization of recoverable transition costs	0	0	304				0	0	304
Depreciation	960	556	455	244	236	196	146	136	128	49	334	235	271	23	147	115	136	26	186	119	133
Taxes, other than income	326	238	280	71	46	29	104	138	194	2	37	21	31	1	18	12	16	1	19	9	14
Energy-related businesses	484	383	396	458	357	371
Total Operating Expenses	9,636	6,655	6,553	5,068	4,067	5,174	1,544	2,171	2,963	398	2,226	1,776	2,090	214	1,123	869	1,105	198	1,195	963	1,086
Loss on impairment of goodwill										0	0	0	1,493
Operating Income (Loss)	3,101	1,866	896	1,361	1,061	135	348	284	329	96	567	438	(1,082)	40	241	188	167	65	353	285	269
Other Income (Expense) - net	4	(31)	47	23	22	44	5	5	6	(2)	(1)	14	23	(3)	(2)	17	19	0	(1)	1	6
Other-Than-Temporary Impairments	6	3	18	6	3	18
Interest Income from Affiliates				8	9	2	2	2	4
Interest Expense	898	593	387	174	208	176	98	99	116	20	146	21	21	7	44	16	17	8	70	6	6
Interest Expense with Affiliates							0	0	2	4	1	131	155	1	0	22	27	2	0	62	69
Income from Continuing Operations Before Income Taxes	2,201	1,239	538	1,212	881	(13)	257	192	221	70	419	300	(1,235)	29	195	167	142	55	282	218	200
Income Taxes	691	263	105	445	261	3	68	57	79	25	153	109	82	10	71	58	47	20	104	78	67
Income from Continuing Operations After Income Taxes	1,510	976	433	767	620	(16)				45	266	191	(1,317)
Income (Loss) from Discontinued Operations (net of income taxes)	2	(17)	(7)	2	242	263				2	(1)	(1)	(220)
Net Income	1,512	959	426	769	862	247	189	135	142	47	265	190	(1,537)	19	124	109	95	35	178	140	133
Net Income Attributable to Noncontrolling Interests	17	21	19	1	1	1				0	0	0	5
Net Income Attributable to Company	1,495	938	407	768	861	246				47	265	190	(1,542)
Distribution on Preferred Securities							16	20	18
Net Income Available to PPL Corporation							173	115	124
Amounts Attributable to Company:
Income from Continuing Operations After Income Taxes	1,493	955	414	766	619	(17)
Income (Loss) from Discontinued Operations (net of income taxes)	2	(17)	(7)	2	242	263
Net Income	$ 1,495	$ 938	$ 407	$ 768	$ 861	$ 246				$ 47	$ 265	$ 190	$ (1,542)
Income from Continuing Operations After Income Taxes Available to PPL Corporation Common Shareowners:
Basic (in dollars per share)	$ 2.70	$ 2.21	$ 1.10
Diluted (in dollars per share)	$ 2.70	$ 2.20	$ 1.10
Net Income Available to PPL Corporation Common Shareowners:
Basic (in dollars per share)	$ 2.71	$ 2.17	$ 1.08
Diluted (in dollars per share)	$ 2.70	$ 2.17	$ 1.08
Dividends Declared Per Share of Common Stock	$ 1.40	$ 1.40	$ 1.38
Weighted-Average Shares of Common Stock Outstanding (in thousands)
Basic	550,395	431,345	376,082
Diluted	550,952	431,569	376,406