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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

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