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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income (Numerator) |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations after income taxes |  |  |  |  |  |  |  |  | $ 1,128 | $ 1,902 | $ 1,603
Less amounts allocated to participating securities |  |  |  |  |  |  |  |  | 2 | 6 | 6
Income from continuing operations after income taxes available to PPL common shareowners - Basic |  |  |  |  |  |  |  |  | 1,126 | 1,896 | 1,597
Income from continuing operations after income taxes available to PPL common shareowners - Diluted |  |  |  |  |  |  |  |  | 1,126 | 1,896 | 1,597
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Basic |  |  |  |  |  |  |  |  | 0 | 0 | (921)
Income (loss) from discontinued operations (net of income taxes) available to PPL common shareowners - Diluted |  |  |  |  |  |  |  |  | 0 | 0 | (921)
Net income | $ 78 | $ 355 | $ 292 | $ 403 | $ 465 | $ 473 | $ 483 | $ 481 | 1,128 | 1,902 | 682
Less amounts allocated to participating securities |  |  |  |  |  |  |  |  | 2 | 6 | 2
Net income available to PPL common shareowners - Basic |  |  |  |  |  |  |  |  | 1,126 | 1,896 | 680
Net income available to PPL common shareowners - Diluted |  |  |  |  |  |  |  |  | $ 1,126 | $ 1,896 | $ 680
Shares of Common Stock (Denominator) |  |  |  |  |  |  |  |  |  |  |
Weighted-average shares - Basic EPS (in shares) |  |  |  |  |  |  |  |  | 685,240 | 677,592 | 669,814
Add incremental non-participating securities: |  |  |  |  |  |  |  |  |  |  |
Share-based payment awards (in shares) |  |  |  |  |  |  |  |  | 2,094 | 2,854 | 2,772
Weighted-average shares - Diluted EPS (in shares) |  |  |  |  |  |  |  |  | 687,334 | 680,446 | 672,586
Basic EPS - Available to PPL common shareowners: |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations after income taxes (in dollars per share) |  |  |  |  |  |  |  |  | $ 1.64 | $ 2.80 | $ 2.38
Income (loss) from discontinued operations (net of income taxes) (in dollars per share) |  |  |  |  |  |  |  |  | 0.00 | 0.00 | (1.37)
Net Income (in dollars per share) | $ 0.11 | $ 0.52 | $ 0.43 | $ 0.59 | $ 0.68 | $ 0.70 | $ 0.71 | $ 0.71 | 1.64 | 2.80 | 1.01
Diluted EPS - Available to PPL common shareowners: |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations after income taxes (in dollars per share) |  |  |  |  |  |  |  |  | 1.64 | 2.79 | 2.37
Income (loss) from discontinued operations (net of income taxes) (in dollars per share) |  |  |  |  |  |  |  |  | 0.00 | 0.00 | (1.36)
Net Income (in dollars per share) | $ 0.11 | $ 0.51 | $ 0.43 | $ 0.59 | $ 0.68 | $ 0.69 | $ 0.71 | $ 0.71 | $ 1.64 | $ 2.79 | $ 1.01
Shares Issued (Numeric) [Abstract] |  |  |  |  |  |  |  |  |  |  |
Common stock issued under stock-based compensation plans (in shares) |  |  |  |  |  |  |  |  | 1,748 |  |
Common stock issued under DRIP (in shares) |  |  |  |  |  |  |  |  | 1,552 |  |
Stock Options [Member] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares excluded from the computations of diluted EPS |  |  |  |  |  |  |  |  | 696 | 696 | 1,087
Performance Units [Member] |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares excluded from the computations of diluted EPS |  |  |  |  |  |  |  |  | 0 | 176 | 36

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