Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income (Numerator) [Abstract]
Net Income	$ 281	$ 475	$ 1,179	$ 1,382
Less amounts allocated to participating securities	0	0	1	2
Net income available to PPL common shareowners - Basic	281	475	1,178	1,380
Net income available to PPL common shareowners - Diluted	$ 281	$ 475	$ 1,178	$ 1,380
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	768,786	722,259	768,502	721,693
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	874	1,106	768	1,009
Forward sale agreements	0	7,786	0	7,975
Weighted-average shares - Diluted EPS (in shares)	769,660	731,151	769,270	730,677
Basic EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.37	$ 0.66	$ 1.53	$ 1.91
Diluted EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.37	$ 0.65	$ 1.53	$ 1.89
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	14	38	621	680
Common stock issued under DRIP (in shares)	0	430	943	1,305
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	364	0	595	0