Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income (Numerator) [Abstract]
Net income (loss)	$ 19	$ 344	$ (1,821)	$ 898
Net income (loss) available to PPL common shareowners - Basic	19	344	(1,821)	898
Net income (loss) available to PPL common shareowners - Diluted	$ 19	$ 344	$ (1,821)	$ 898
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	769,466	768,768	769,313	768,358
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	0	640	0	715
Weighted-average shares - Diluted EPS (in shares)	769,466	769,408	769,313	769,073
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	137	9	657	607
Common stock issued under DRIP (in shares)	0	509	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	$ (536)	$ 153	$ (333)	$ 357
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic and Diluted	$ 555	$ 191	$ (1,488)	$ 541
Income (loss) from Discontinued Operations (net of income taxes)	$ 0.72	$ 0.25	$ (1.93)	$ 0.70
Income from Continuing Operations after income taxes	$ (0.69)	$ 0.20	$ (0.44)	$ 0.47
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	3,443	1,170	1,838	710