Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income (Numerator) [Abstract]
Net Income	$ 344	$ 441	$ 898	$ 907
Less amounts allocated to participating securities	1	1	1	1
Net income available to PPL common shareowners - Basic	343	440	897	906
Net income available to PPL common shareowners - Diluted	$ 343	$ 440	$ 897	$ 906
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	768,768	721,785	768,358	721,406
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	640	897	715	960
Forward sale agreements	0	8,233	0	8,070
Weighted-average shares - Diluted EPS (in shares)	769,408	730,915	769,073	730,436
Basic EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.45	$ 0.61	$ 1.17	$ 1.26
Diluted EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.45	$ 0.60	$ 1.17	$ 1.24
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	9	52	607	642
Common stock issued under DRIP (in shares)	509	417	943	875
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	1,170	0	710	0