SCHEDULE I - CONDENSED UNCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating Revenues [Abstract]
Operating Revenues	$ 4,023	[1]	$ 3,449	[1]	$ 2,833	[1]	$ 1,194	[1]	$ 2,819	[1]	$ 3,074	[1]	$ 3,403	[1]	$ 2,425	[1]	$ 11,499	$ 11,721	$ 12,132
Operating Expenses [Abstract]
Other operation and maintenance																	2,803	2,779	2,791
Total Operating Expenses																	8,227	9,443	9,106
Operating Income (Loss)	983	[1]	869	[1]	697	[1]	723	[1]	21	[1],[2]	846	[1]	732	[1]	679	[1]	3,272	2,278	3,026
Other Income (Expense) - net [Abstract]
Other Income (Expense) - net																	118	(23)	(39)
Interest Expense																	1,024	994	951
Income (Loss) Before Income Taxes																	2,364	1,260	2,009
Income Tax Expense (Benefit)																	781	163	518
Net Income (Loss)	695	[1]	497	[1]	229	[1]	316	[1]	(98)	[1],[2]	410	[1]	405	[1]	413	[1]	1,737	1,130	1,526
Comprehensive Income (Loss)																	1,028	1,505	374
Net Income Available to PPL Corporation Common Shareowners: (in dollars per share)
Basic	$ 1.04	[1],[3]	$ 0.74	[1],[3]	$ 0.35	[1],[3]	$ 0.5	[1],[3]	$ (0.16)	[1],[2],[3]	$ 0.65	[1],[3]	$ 0.68	[1],[3]	$ 0.7	[1],[3]	$ 2.64	$ 1.85	$ 2.61
Diluted	$ 1.04	[1],[3]	$ 0.74	[1],[3]	$ 0.34	[1],[3]	$ 0.49	[1],[3]	$ (0.16)	[1],[2],[3],[4]	$ 0.62	[1],[3]	$ 0.63	[1],[3]	$ 0.65	[1],[3]	$ 2.61	$ 1.76	$ 2.6
Weighted-Average Shares of Common Stock Outstanding (in thousands)
Basic																	653,504	608,983	580,276
Diluted																	665,973	663,073	581,626
PPL Corp [Member]
Operating Expenses [Abstract]
Other operation and maintenance																	16	1	11
Total Operating Expenses																	16	1	11
Operating Income (Loss)																	(16)	(1)	(11)
Other Income (Expense) - net [Abstract]
Equity in earnings of subsidiaries																	1,776	1,171	1,580
Other income (expense)																	(18)	(13)	1
Other Income (Expense) - net																	1,758	1,158	1,581
Interest Expense																	15	21	22
Interest Expense with Affiliates																	10	29	43
Income (Loss) Before Income Taxes																	1,717	1,107	1,505
Income Tax Expense (Benefit)																	(20)	(23)	(21)
Net Income (Loss)																	1,737	1,130	1,526
Comprehensive Income (Loss)																	1,028	1,505	374
Net Income Available to PPL Corporation Common Shareowners: (in dollars per share)
Basic																	$ 2.64	$ 1.85	$ 2.61
Diluted																	$ 2.61	$ 1.76	$ 2.6
Weighted-Average Shares of Common Stock Outstanding (in thousands)
Basic																	653,504	608,983	580,276
Diluted																	665,973	663,073	581,626
L G And E And K U Energy L L C Unconsolidated [Member]
Operating Expenses [Abstract]
Other operation and maintenance																	0	0	3
Total Operating Expenses																	0	0	3
Operating Income (Loss)																	0	0	(3)
Other Income (Expense) - net [Abstract]
Equity in earnings of subsidiaries																	368	376	234
Interest Income from Affiliates																	5	5	10
Interest Expense																	41	39	39
Interest Expense with Affiliates																	3	3	2
Income (Loss) Before Income Taxes																	329	339	200
Income Tax Expense (Benefit)																	(15)	(8)	(19)
Net Income (Loss)																	344	347	219
Comprehensive Income (Loss)																	$ 286	$ 375	$ 200

[1] Quarterly results can vary depending on, among other things, weather and the forward pricing of power. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

[2] Fourth quarter of 2013 includes a charge for the termination of the lease of the Colstrip coal-fired electric generating facility in Montana. See Note 8 to the Financial Statements for additional information.

[3] The sum of the quarterly amounts may not equal annual earnings per share due to changes in the number of common shares outstanding during the year or rounding.

[4] As a result of a reported loss, diluted earnings per share for the three months ended December 31, 2013 exclude incremental shares as they were anti-dilutive.