Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income (Numerator) [Abstract]
Net income (loss)	$ (1,840)	$ 554
Net income (loss) available to PPL common shareowners - Basic	(1,840)	554
Net income (loss) available to PPL common shareowners - Diluted	$ (1,840)	$ 554
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	769,159	767,948
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	1,551	790
Weighted-average shares - Diluted EPS (in shares)	770,710	768,738
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	520	598
Common stock issued under DRIP (in shares)	0	434
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	$ 203	$ 204
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted	$ (2,043)	$ 350
Income (loss) from Discontinued Operations (net of income taxes)	$ (2.65)	$ 0.45
Income from Continuing Operations after income taxes	$ 0.26	$ 0.27
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	233	250