Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income (Numerator) [Abstract]
Net Income	$ 554	$ 466
Less amounts allocated to participating securities	1	0
Net income available to PPL common shareowners - Basic	553	466
Net income available to PPL common shareowners - Diluted	$ 553	$ 466
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	767,948	721,023
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	790	1,023
Forward sale agreements	0	7,907
Weighted-average shares - Diluted EPS (in shares)	768,738	729,953
Basic EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.72	$ 0.65
Diluted EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.72	$ 0.64
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	598	590
Common stock issued under DRIP (in shares)	434	458
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	250	0