SCHEDULE I - CONDENSED UNCONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Revenues [Abstract]
Operating Revenues	$ 1,926	$ 1,845	$ 1,725	$ 1,951	$ 1,832	$ 1,889	$ 1,785	$ 2,011	$ 7,447	$ 7,517	$ 7,669
Operating Expenses [Abstract]
Other operation and maintenance									1,635	1,745	1,938
Total Operating Expenses									4,379	4,469	4,838
Operating Loss	793	777	702	796	714	786	725	823	3,068	3,048	2,831
Other Income (Expense) - net [Abstract]
Other Income (Expense) - net									(255)	390	108
Interest Expense									901	888	871
Income Taxes									784	648	465
Net income	$ 78	$ 355	$ 292	$ 403	$ 465	$ 473	$ 483	$ 481	1,128	1,902	682
Total other comprehensive income (loss)									356	(1,050)	(430)
Comprehensive Income Attributable to PPL Shareowners									$ 1,484	$ 852	$ 252
Net Income Available to PPL Corporation Common Shareowners: (in dollars per share)
Basic	$ 0.11	$ 0.52	$ 0.43	$ 0.59	$ 0.68	$ 0.70	$ 0.71	$ 0.71	$ 1.64	$ 2.80	$ 1.01
Diluted	$ 0.11	$ 0.51	$ 0.43	$ 0.59	$ 0.68	$ 0.69	$ 0.71	$ 0.71	$ 1.64	$ 2.79	$ 1.01
Weighted-Average Shares of Common Stock Outstanding (in thousands)
Basic									685,240	677,592	669,814
Diluted									687,334	680,446	672,586
PPL Corp [Member]
Operating Revenues [Abstract]
Operating Revenues									$ 0	$ 0	$ 0
Operating Expenses [Abstract]
Other operation and maintenance									2	2	9
Total Operating Expenses									2	2	9
Operating Loss									(2)	(2)	(9)
Other Income (Expense) - net [Abstract]
Equity in earnings of subsidiaries									1,175	1,915	711
Other income (expense)									(1)	(1)	(15)
Other Income (Expense) - net									1,174	1,914	696
Interest Expense									8	8	9
Interest Expense with Affiliates									16	10	10
Income Before Income Taxes									1,148	1,894	668
Income Taxes									20	(8)	(14)
Net income									1,128	1,902	682
Total other comprehensive income (loss)									356	(1,050)	(430)
Comprehensive Income Attributable to PPL Shareowners									$ 1,484	$ 852	$ 252
Net Income Available to PPL Corporation Common Shareowners: (in dollars per share)
Basic									$ 1.64	$ 2.80	$ 1.01
Diluted									$ 1.64	$ 2.79	$ 1.01
Weighted-Average Shares of Common Stock Outstanding (in thousands)
Basic									685,240	677,592	669,814
Diluted									687,334	680,446	672,586
L G And E And K U Energy L L C Unconsolidated [Member]
Other Income (Expense) - net [Abstract]
Equity in earnings of subsidiaries									$ 397	$ 452	$ 390
Interest Income from Affiliate									14	9	4
Other Income (Expense) - net									411	461	394
Interest Expense									30	29	39
Interest Expense with Affiliates									20	18	5
Income Before Income Taxes									361	414	350
Income Taxes									45	(15)	(14)
Net income									316	429	364
Total other comprehensive income (loss)									(18)	(24)	(1)
Comprehensive Income Attributable to PPL Shareowners									$ 298	$ 405	$ 363