Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income (Numerator) [Abstract]
Net income (loss)	$ 207	$ 281	$ (1,614)	$ 1,179
Net income (loss) available to PPL common shareowners - Basic	207	281	(1,614)	1,179
Net income (loss) available to PPL common shareowners - Diluted	$ 207	$ 281	$ (1,614)	$ 1,179
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	767,733	768,786	768,781	768,502
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	2,116	874	0	768
Weighted-average shares - Diluted EPS (in shares)	769,849	769,660	768,781	769,270
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	158	14	816	621
Common stock issued under DRIP (in shares)	0	0	0	943
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Income from continuing operations after income taxes available to PPL common shareowners - Basic and Diluted	$ 209	$ 117	$ (124)	$ 474
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted	$ (2)	$ 164	$ (1,490)	$ 705
Income (loss) from Discontinued Operations (net of income taxes)	$ 0	$ 0.22	$ (1.94)	$ 0.91
Income from Continuing Operations after income taxes	$ 0.27	$ 0.15	$ (0.16)	$ 0.62
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	135	364	2,339	595