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Quarterly Financial Data (Unaudited)
12 Months Ended
Dec. 31, 2011
PPL Corp [Member]
 
Quarterly Financial Information (Unaudited) [Line Items]  
Quarterly Financial Information (Unaudited)
QUARTERLY FINANCIAL, COMMON STOCK PRICE AND DIVIDEND DATA (Unaudited)
PPL Corporation and Subsidiaries
(Millions of Dollars, except per share data)
    For the Quarters Ended (a)
    March 31 June 30 Sept. 30 Dec. 31
2011            
Operating revenues  $ 2,910 $ 2,489 $ 3,120 $ 4,218
Operating income    805   595   767   934
Income from continuing operations after income taxes    402   201   449   458
Income (loss) from discontinued operations    3   (1)      
Net income   405   200   449   458
Net income attributable to PPL Corporation   401   196   444   454
Income from continuing operations after income taxes available to            
 PPL Corporation common shareowners: (b)            
  Basic EPS   0.82   0.35   0.76   0.78
  Diluted EPS   0.82   0.35   0.76   0.78
Net income available to PPL Corporation common shareowners: (b)            
  Basic EPS   0.82   0.35   0.76   0.78
  Diluted EPS    0.82   0.35   0.76   0.78
Dividends declared per share of common stock (c)    0.350   0.350   0.350   0.350
Price per common share:            
  High $ 26.98 $ 28.38 $ 29.61 $ 30.27
  Low   24.10   25.23   25.00   27.00
               
2010            
Operating revenues  $ 3,006 $ 1,473 $ 2,179 $ 1,863
Operating income    476   226   522   642
Income from continuing operations after income taxes    247   85   306   338
Income (loss) from discontinued operations    8   7   (53)   21
Net income   255   92   253   359
Net income attributable to PPL Corporation   250   85   248   355
Income from continuing operations after income taxes available to            
 PPL Corporation common shareowners: (b)            
  Basic EPS   0.64   0.20   0.62   0.69
  Diluted EPS   0.64   0.20   0.62   0.69
Net income available to PPL Corporation common shareowners: (b)            
  Basic EPS   0.66   0.22   0.51   0.73
  Diluted EPS   0.66   0.22   0.51   0.73
Dividends declared per share of common stock (c)    0.350   0.350   0.350   0.350
Price per common share:            
  High $ 32.77 $ 28.80 $ 28.00 $ 28.14
  Low   27.47   23.75   24.83   25.13

(a)       Quarterly results can vary depending on, among other things, weather and the forward pricing of power. In addition, earnings in 2011 and 2010 were affected by special items. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.

(b)       The sum of the quarterly amounts may not equal annual earnings per share due to changes in the number of common shares outstanding during the year or rounding.

(c)       PPL has paid quarterly cash dividends on its common stock in every year since 1946. Future dividends, declared at the discretion of the Board of Directors, will be dependent upon future earnings, cash flows, financial requirements and other factors.

PPL Electric [Member]
 
Quarterly Financial Information (Unaudited) [Line Items]  
Quarterly Financial Information (Unaudited)
QUARTERLY FINANCIAL DATA (Unaudited)
PPL Electric Utilities Corporation and Subsidiaries
(Millions of Dollars)
  For the Quarters Ended (a)
   March 31  June 30  Sept. 30  Dec. 31
2011            
Operating revenues $ 558 $ 440 $ 455 $ 439
Operating income   103   82   69   94
Net income   56   40   32   61
Net income available to PPL Corporation   52   36   28   57
             
2010            
Operating revenues $ 813 $ 522 $ 571 $ 549
Operating income   87   56   79   62
Net income   42   23   40   30
Net income available to PPL Corporation   37   16   36   26

(a)       PPL Electric's business is seasonal in nature, with peak sales periods generally occurring in the winter and summer months. Accordingly, comparisons among quarters of a year may not be indicative of overall trends and changes in operations.