Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income (Numerator) [Abstract]
Net Income	$ 441	$ 515	$ 907	$ 967
Less amounts allocated to participating securities	1	0	1	1
Net income available to PPL common shareowners - Basic	440	515	906	966
Net income available to PPL common shareowners - Diluted	$ 440	$ 515	$ 906	$ 966
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	721,785	699,006	721,406	696,772
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	897	173	960	491
Forward sale agreements	8,233	1,797	8,070	898
Weighted-average shares - Diluted EPS (in shares)	730,915	700,976	730,436	698,161
Basic EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.61	$ 0.74	$ 1.26	$ 1.39
Diluted EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.60	$ 0.73	$ 1.24	$ 1.38
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	52	12	642	488
Common stock issued under DRIP (in shares)	417	526	875	1,011
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	0	441	0	336
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	0	23	0	21