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CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Millions | Total | Common Stock | Additional Paid-in Capital | Earnings Reinvested | Accumulated Other Comprehensive Loss | PPL Electric Utilities Corp [Member] | PPL Electric Utilities Corp [Member] Common Stock | PPL Electric Utilities Corp [Member] Additional Paid-in Capital | PPL Electric Utilities Corp [Member] Earnings Reinvested | LG And E And KU Energy LLC [Member] | Louisville Gas And Electric Co [Member] | Louisville Gas And Electric Co [Member] Common Stock | Louisville Gas And Electric Co [Member] Additional Paid-in Capital | Louisville Gas And Electric Co [Member] Earnings Reinvested | Kentucky Utilities Co [Member] | Kentucky Utilities Co [Member] Common Stock | Kentucky Utilities Co [Member] Additional Paid-in Capital | Kentucky Utilities Co [Member] Earnings Reinvested | Kentucky Utilities Co [Member] Accumulated Other Comprehensive Loss
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Balance at beginning of period - shares at Dec. 31, 2014 |  |  | 665,849 | [1] |  |  |  |  |  | 66,368 | [2] |  |  |  |  |  |  | 21,294 | [3] |  |  |  |  | 37,818 | [4] |  |  |
Balance at beginning of period at Dec. 31, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,248 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at beginning of period at Dec. 31, 2014 |  | $ 13,628 | $ 7 |  | $ 9,433 | $ 6,462 | $ (2,274) | $ 2,717 |  | $ 364 |  | $ 1,603 |  | $ 750 |  | $ 2,174 |  | $ 424 |  | $ 1,521 | $ 229 | $ 3,206 |  | $ 308 |  | $ 2,596 | $ 302 | $ 0
Common stock shares issued | [1] |  | 8,008 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  | 249 |  |  | 249 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  | 5 |  |  | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 682 |  |  |  | 682 |  | 252 | [5] |  |  |  |  | 252 | 364 | 185 | [6] |  |  |  | 185 | 234 | [7] |  |  |  | 234 |
Capital contributions from parent |  |  |  |  |  |  |  | 331 | [8] |  |  | 331 | [8] |  |  | 90 |  |  |  | 90 |  |  |  |  |  |  |  |
Dividends, dividend equivalents, redemptions and distributions |  | (1,010) |  |  |  | (1,010) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  |  |  |  |  |  |  | (181) |  |  |  |  |  | (181) |  | (119) |  |  |  |  | (119) | (153) |  |  |  |  | (153) |
Contributions from member |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 125 |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to member |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (219) |  |  |  |  |  |  |  |  |  |  |  |  |
Distribution of PPL Energy Supply |  | (3,205) |  |  |  | (3,181) | (24) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (430) |  |  |  |  | (430) |  |  |  |  |  |  |  | (1) |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period - shares at Dec. 31, 2015 |  |  | 673,857 | [1] |  |  |  |  |  | 66,368 | [2] |  |  |  |  |  |  | 21,294 | [3] |  |  |  |  | 37,818 | [4] |  |  |
Balance at end of period at Dec. 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,517 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period at Dec. 31, 2015 |  | 9,919 | $ 7 |  | 9,687 | 2,953 | (2,728) | 3,119 |  | $ 364 |  | 1,934 |  | 821 |  | 2,330 |  | $ 424 |  | 1,611 | 295 | 3,287 |  | $ 308 |  | 2,596 | 383 | 0
Common stock shares issued | [1] |  | 5,874 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  | 185 |  |  | 185 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  | (31) |  |  | (31) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 1,902 |  |  |  | 1,902 |  | 340 | [5] |  |  |  |  | 340 | 429 | 203 | [6] |  |  |  | 203 | 265 | [7] |  |  |  | 265 |
Capital contributions from parent |  |  |  |  |  |  |  | 220 |  |  |  | 220 |  |  |  | 71 |  |  |  | 71 |  | 20 |  |  |  | 20 |  |
Dividends, dividend equivalents, redemptions and distributions |  | (1,033) |  |  |  | (1,033) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  |  |  |  |  |  |  | $ (288) |  |  |  |  |  | (288) |  | $ (128) |  |  |  |  | (128) | (248) |  |  |  |  | (248) |
Contributions from member |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 61 |  |  |  |  |  |  |  |  |  |  |  |  |
Distributions to member |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (316) |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | (1,050) |  |  |  |  | (1,050) |  |  |  |  |  |  |  | (24) |  |  |  |  |  |  | $ (1) |  |  |  |  |  | (1)
Adoption of stock-based compensation guidance cumulative effect adjustment |  | $ 7 |  |  |  | 7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period - shares at Dec. 31, 2016 |  | 679,731 | 679,731 | [1] |  |  |  | 66,368 |  | 66,368 | [2] |  |  |  |  | 21,294 |  | 21,294 | [3] |  |  | 37,818 |  | 37,818 | [4] |  |  |
Balance at end of period at Dec. 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,667 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period at Dec. 31, 2016 |  | $ 9,899 | $ 7 |  | 9,841 | 3,829 | (3,778) | $ 3,391 |  | $ 364 |  | 2,154 |  | 873 |  | $ 2,476 |  | $ 424 |  | 1,682 | 370 | $ 3,323 |  | $ 308 |  | 2,616 | 400 | (1)
Common stock shares issued | [1] |  | 13,667 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock issued |  | 482 |  |  | 482 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation |  | (18) |  |  | (18) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income |  | 1,128 |  |  |  | 1,128 |  | 362 | [5] |  |  |  |  | 362 | 316 | 213 | [6] |  |  |  | 213 | 259 | [7] |  |  |  | 259 |
Capital contributions from parent |  |  |  |  |  |  |  | 575 |  |  |  | 575 |  |  |  | 30 |  |  |  | 30 |  |  |  |  |  |  |  |
Dividends, dividend equivalents, redemptions and distributions |  | (1,086) |  |  |  | (1,086) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends declared on common stock |  |  |  |  |  |  |  | $ (336) |  |  |  |  |  | (336) |  | $ (192) |  |  |  |  | (192) | (226) |  |  |  |  | (226) |
Distributions to member |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (402) |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income (loss) |  | $ 356 |  |  |  |  | 356 |  |  |  |  |  |  |  | (18) |  |  |  |  |  |  | $ 1 |  |  |  |  |  | 1
Balance at end of period - shares at Dec. 31, 2017 |  | 693,398 | 693,398 | [1] |  |  |  | 66,368 |  | 66,368 | [2] |  |  |  |  | 21,294 |  | 21,294 | [3] |  |  | 37,818 |  | 37,818 | [4] |  |  |
Balance at end of period at Dec. 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 4,563 |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at end of period at Dec. 31, 2017 |  | $ 10,761 | $ 7 |  | $ 10,305 | $ 3,871 | $ (3,422) | $ 3,992 |  | $ 364 |  | $ 2,729 |  | $ 899 |  | $ 2,527 |  | $ 424 |  | $ 1,712 | $ 391 | $ 3,357 |  | $ 308 |  | $ 2,616 | $ 433 | $ 0
[1] | Shares in thousands. Each share entitles the holder to one vote on any question presented at any shareowners' meeting.
[2] | Shares in thousands. All common shares of PPL Electric stock are owned by PPL.
[3] | Shares in thousands. All common shares of LG&E stock are owned by LKE.
[4] | Shares in thousands. All common shares of KU stock are owned by LKE.
[5] | Net income equals comprehensive income.
[6] | Net income equals comprehensive income.
[7] | Net income approximates comprehensive income.
[8] | Includes non-cash contributions of $56 million. See Note 11 for additional information.

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