Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended																12 Months Ended
		Nov. 30, 2016	Dec. 31, 2016		Sep. 30, 2016		Jun. 30, 2016		Mar. 31, 2016		Dec. 31, 2015		Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Quarterly Financial Information Disclosure [Line Items]
Operating Revenues			$ 1,832	[1]	$ 1,889	[1]	$ 1,785	[1]	$ 2,011	[1]	$ 1,780	[1]	$ 1,878	[1]	$ 1,781	[1]	$ 2,230	[1]	$ 7,517		$ 7,669		$ 7,852
Operating income			714	[1]	786	[1]	725	[1]	823	[1]	617	[1]	686	[1]	638	[1]	890	[1]	3,048		2,831		2,867
Income from continuing operations after income taxes											405	[1]	396	[1]	250	[1]	552	[1]	1,902		1,603		1,437
Income (Loss) from Discontinued Operations (net of income taxes)											(6)	[1],[2],[3]	(3)	[1],[2],[3]	(1,007)	[1],[2],[3]	95	[1],[2],[3]	0		(921)		300
Net income (loss)			$ 465	[1]	$ 473	[1]	$ 483	[1]	$ 481	[1]	$ 399	[1]	$ 393	[1]	$ (757)	[1],[4]	$ 647	[1]	$ 1,902		$ 682		$ 1,737
Income from continuing operations after income taxes available to PPL common shareowners: [Abstract]
Basic (in dollars per share)											$ 0.60	[1],[5]	$ 0.59	[1],[5]	$ 0.37	[1],[5]	$ 0.83	[1],[5]	$ 2.80		$ 2.38		$ 2.19
Diluted (in dollars per share)											0.60	[1],[5]	0.59	[1],[5]	0.37	[1],[5]	0.82	[1],[5]	2.79		2.37		2.16
Net income (loss) available to PPL common shareowners: [Abstract]
Basic (in dollars per share)			$ 0.68	[1],[5]	$ 0.70	[1],[5]	$ 0.71	[1],[5]	$ 0.71	[1],[5]	0.59	[1],[5]	0.58	[1],[5]	(1.13)	[1],[5]	0.97	[1],[5]	2.80		1.01		2.64
Diluted (in dollars per share)			0.68	[1],[5]	0.69	[1],[5]	0.71	[1],[5]	0.71	[1],[5]	0.59	[1],[5]	0.58	[1],[5]	(1.13)	[1],[5]	0.96	[1],[5]	2.79		1.01		2.61
Dividends declared per share of common stock (in dollars per share)		$ 0.38	0.38	[1],[3]	0.38	[1],[3]	0.38	[1],[3]	0.38	[1],[3]	0.3775	[1],[5]	0.3775	[1],[5]	0.3725	[1],[5]	0.3725	[1],[5]	$ 1.52		$ 1.50		$ 1.49
Price per common share: [Abstract]
High (in dollars per share)	[1]		34.74		37.71		39.68		38.07		34.75		33.58		34.85		36.38
Low (in dollars per share)	[1]		$ 32.19		$ 33.63		$ 36.27		$ 32.80		$ 32.60		$ 29.41		$ 29.45		$ 31.40
PPL Energy Supply Spinoff [Member]
Quarterly Financial Information Disclosure [Line Items]
Income (Loss) from Discontinued Operations (net of income taxes)																					$ (921)		$ 300
Price per common share: [Abstract]
Gain (loss) on disposal group															$ (879)						(879)		0
Montana Hydroelectric Generating Facilities [Member]
Price per common share: [Abstract]
Gain (loss) on disposal group																							137
PPL Electric Utilities Corp [Member]
Quarterly Financial Information Disclosure [Line Items]
Operating Revenues			$ 537	[6]	$ 539	[6]	$ 495	[6]	$ 585	[6]	$ 499	[6]	$ 519	[6]	476	[6]	$ 630	[6]	$ 2,156		2,124		2,044
Operating income			154	[6]	176	[6]	154	[6]	180	[6]	126	[6]	121	[6]	116	[6]	175	[6]	664		538		538
Net income (loss)			$ 77	[6]	$ 90	[6]	$ 79	[6]	$ 94	[6]	$ 61	[6]	$ 55	[6]	$ 49	[6]	$ 87	[6]	$ 340	[7]	$ 252	[7]	$ 263	[7]

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

[2] In the second quarter of 2015, PPL completed the spinoff of PPL Energy Supply substantially representing PPL's Supply segment. Accordingly, the previously reported operating results for PPL's Supply segment have been reclassified as discontinued operations. See Note 8 to the Financial Statements for additional information.

[3] PPL has paid quarterly cash dividends on its common stock in every year since 1946. Future dividends, declared at the discretion of the Board of Directors, will be dependent upon future earnings, cash flows, financial requirements and other factors.

[4] The second quarter of 2015 includes a loss of $879 million from the spinoff of PPL Energy Supply. See Note 8 to the Financial Statements for additional information.

[5] 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.

[6] PPL Electric's business is seasonal in nature, with peak sales periods generally occurring in the winter and summer months. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

[7] Net income equals comprehensive income.