Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income (Numerator) [Abstract]
Net Income	$ 475	$ 445	$ 1,382	$ 1,412
Less amounts allocated to participating securities	0	1	2	2
Net income available to PPL common shareowners - Basic	475	444	1,380	1,410
Net income available to PPL common shareowners - Diluted	$ 475	$ 444	$ 1,380	$ 1,410
Shares of Common Stock (Denominator) [Abstract]
Weighted-average shares - Basic EPS (in shares)	722,259	703,730	721,693	699,117
Add incremental non-participating securities: [Abstract]
Share-based payment awards (in shares)	1,106	298	1,009	427
Forward sale agreements	7,786	6,489	7,975	2,761
Weighted-average shares - Diluted EPS (in shares)	731,151	710,517	730,677	702,305
Basic EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.66	$ 0.63	$ 1.91	$ 2.02
Diluted EPS - Available to PPL common shareowners: [Abstract]
Net Income Available to PPL common shareowners (in dollars per share)	$ 0.65	$ 0.62	$ 1.89	$ 2.01
Shares Issued (Numeric) [Abstract]
Common stock issued under stock-based compensation plans (in shares)	38	80	680	568
Common stock issued under DRIP (in shares)	430	493	1,305	1,504
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the computations of diluted EPS	0	15	0	229
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	2	0	15