Quarterly Financial Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	Nov. 30, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Quarterly Financial Information Disclosure [Line Items]
Operating Revenues		$ 1,954	$ 1,933	$ 1,803	$ 2,079	$ 1,939	$ 1,872	$ 1,848	$ 2,126	$ 7,769		$ 7,785		$ 7,447
Operating income		693	726	640	781	657	686	658	851	2,840		2,852		2,901
Net income		$ 364	$ 475	$ 441	$ 466	$ 415	$ 445	$ 515	$ 452	$ 1,746		$ 1,827		$ 1,128
Net income (loss) available to PPL common shareowners: [Abstract]
Basic (in dollars per share)		$ 0.49	$ 0.66	$ 0.61	$ 0.65	$ 0.57	$ 0.63	$ 0.74	$ 0.65	$ 2.39		$ 2.59		$ 1.64
Diluted (in dollars per share)		$ 0.48	$ 0.65	$ 0.60	$ 0.64	$ 0.57	$ 0.62	$ 0.73	$ 0.65	2.37		2.58		1.64
Dividends declared per share of common stock (in dollars per share)	$ 0.4125									$ 1.65		$ 1.64		$ 1.58
PPL Electric Utilities Corp [Member]
Quarterly Financial Information Disclosure [Line Items]
Operating Revenues		$ 602	$ 590	$ 521	$ 645	$ 573	$ 548	$ 517	$ 639	$ 2,358		$ 2,277		$ 2,195
Operating income		193	193	161	198	155	178	133	228	745		694		700
Net income		$ 124	$ 118	$ 94	$ 121	$ 96	$ 111	$ 75	$ 148	$ 457	[1]	$ 430	[1]	$ 362	[1]

[1] Net income equals comprehensive income.