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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016
Income (Numerator) [Abstract] |  |
Net Income | $ 403 | $ 481
Less amounts allocated to participating securities | 1 | 2
Net income available to PPL common shareowners - Basic | 402 | 479
Net income available to PPL common shareowners - Diluted | $ 402 | $ 479
Shares of Common Stock (Denominator) [Abstract] |  |
Weighted-average shares - Basic EPS (in shares) | 680,882 | 675,441
Add incremental non-participating securities: [Abstract] |  |
Share-based payment awards (in shares) | 2,202 | 3,376
Weighted-average shares - Diluted EPS (in shares) | 683,084 | 678,817
Basic EPS - Available to PPL common shareowners: [Abstract] |  |
Net Income Available to PPL common shareowners (in dollars per share) | $ 0.59 | $ 0.71
Diluted EPS - Available to PPL common shareowners: [Abstract] |  |
Net Income Available to PPL common shareowners (in dollars per share) | $ 0.59 | $ 0.71
Shares Issued (Numeric) [Abstract] |  |
Common stock issued under stock-based compensation plans (in shares) | 887 | 2,125
Common stock issued under dividend reinvestment plan (in shares) | 445 | 402
Stock Options [Member] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |
Shares excluded from the computations of diluted EPS | 696 | 696

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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