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Quarterly Financial Data (Tables)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
                
(in millions, except per share data)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 5,898 $ 5,879 $ 6,709 $ 6,112 $ 24,598
Operating income  1,215   821   1,743   1,203   4,982
Income from continuing operations  634   345   994   686   2,659
Net income  634   342   1,008   692   2,676
Net income attributable to Duke Energy Corporation  634   339   1,004   688   2,665
Earnings per share:              
Income from continuing operations attributable to Duke Energy Corporation common shareholders              
 Basic$ 0.89 $ 0.48 $ 1.40 $ 0.96 $ 3.74
 Diluted$ 0.89 $ 0.48 $ 1.40 $ 0.96 $ 3.74
Net income attributable to Duke Energy Corporation common shareholders              
 Basic$ 0.89 $ 0.48 $ 1.42 $ 0.97 $ 3.77
 Diluted$ 0.89 $ 0.48 $ 1.42 $ 0.97 $ 3.76
               
2012              
Operating revenues$ 3,630 $ 3,577 $ 6,722 $ 5,695 $ 19,624
Operating income  495   786   1,078   767   3,126
Income from continuing operations  297   449   594   406   1,746
Net income  299   448   598   437   1,782
Net income attributable to Duke Energy Corporation  295   444   594   435   1,768
Earnings per share:              
Income from continuing operations attributable to Duke Energy Corporation common shareholders              
 Basic$ 0.66 $ 0.99 $ 0.84 $ 0.57 $ 3.01
 Diluted$ 0.66 $ 0.99 $ 0.84 $ 0.57 $ 3.01
Net income attributable to Duke Energy Corporation common shareholders              
 Basic$ 0.66 $ 0.99 $ 0.85 $ 0.62 $ 3.07
 Diluted$ 0.66 $ 0.99 $ 0.85 $ 0.62 $ 3.07
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013(a)              
Costs to achieve Progress Energy merger (see Note 2)$ (55) $ (82) $ (88) $ (72) $ (297)
Crystal River Unit 3 charges (see Note 4)    (295)     (57)   (352)
Harris and Levy nuclear development charges (see Note 4)    (87)       (87)
Gain on sale of DukeNet (see Note 12)        105   105
Total$ (55) $ (464) $ (88) $ (24) $ (631)
                
2012              
Costs to achieve Progress Energy merger (see Note 2)$ (8) $ (7) $ (457) $ (164) $ (636)
Edwardsport IGCC charges (see Note 4)  (420)     (180)   (28)   (628)
Voluntary Opportunity Plan deferral (see Note 19)  101         101
Total$ (327) $ (7) $ (637) $ (192) $ (1,163)
                
(a)Revised retail rates became effective in January for Duke Energy Florida, May for Duke Energy Ohio, June for Duke Energy Progress and September for Duke Energy Carolinas (see Note 4 for further information).
                
Duke Energy Carolinas [Member]
   
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
DUKE ENERGY CAROLINAS              
                
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 1,729 $ 1,591 $ 1,919 $ 1,715 $ 6,954
Operating income  434   351   604   420   1,809
Net income  244   181   342   209   976
                
2012              
Operating revenues$ 1,501 $ 1,616 $ 1,939 $ 1,609 $ 6,665
Operating income  475   386   440   216   1,517
Net income  266   211   258   130   865
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013(a)              
Costs to achieve Progress Energy merger (see Note 2)$ (22) $ (35) $ (34) $ (29) $ (120)
                
2012              
Costs to achieve Progress Energy merger (see Note 2)$ (4) $ (5) $ (184) $ (46) $ (239)
Voluntary Opportunity Plan deferral (see Note 19)  101         101
Total$ 97 $ (5) $ (184) $ (46) $ (138)
                
(a)Revised retail rates became effective in September in both North Carolina and South Carolina (see Note 4 for further information).
                
Progress Energy [Member]
   
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
                
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 2,186 $ 2,281 $ 2,766 $ 2,300 $ 9,533
Operating income  430   114   671   403   1,618
Income (loss) from continuing operations  154   (13)   328   190   659
Net income (loss)  154   (17)   342   196   675
Net income (loss) attributable to Parent  153   (17)   341   195   672
                
2012              
Operating revenues$ 2,102 $ 2,288 $ 2,788 $ 2,227 $ 9,405
Operating income  363   277   379   118   1,137
Income (loss) from continuing operations  141   68   154   (8)   355
Net income  152   64   157   34   407
Net income attributable to Parent  150   63   155   32   400
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013(a)              
Costs to achieve the merger with Duke Energy (see Note 2)$ (19) $ (33) $ (42) $ (28) $ (122)
Crystal River Unit 3 charges (see Note 4)    (295)     (57)   (352)
Harris and Levy nuclear development charges (see Note 4)    (87)       (87)
Total$ (19) $ (415) $ (42) $ (85) $ (561)
                
2012              
Costs to achieve the merger with Duke Energy (see Note 2)$ (7) $ (20) $ (217) $ (82) $ (326)
Florida replacement power refund (see Note 4)      (100)     (100)
Crystal River Unit 3 charges (see Note 4)        (192)   (192)
Total$ (7) $ (20) $ (317) $ (274) $ (618)
                
Duke Energy Progress [Member]
   
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
DUKE ENERGY PROGRESS              
                
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 1,216 $ 1,135 $ 1,430 $ 1,211 $ 4,992
Operating income  212   166   303   251   932
Net income  110   77   175   138   500
                
2012              
Operating revenues$ 1,090 $ 1,090 $ 1,398 $ 1,128 $ 4,706
Operating income  107   83   172   148   510
Net income  52   31   96   93   272
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013(a)              
Costs to achieve the merger with Duke Energy (see Note 2)$ (11) $ (22) $ (32) $ (19) $ (84)
Harris nuclear development charges (see Note 4)    (22)       (22)
Total$ (11) $ (44) $ (32) $ (19) $ (106)
                
2012              
Costs to achieve the merger with Duke Energy (see Note 2)$ (4) $ (12) $ (180) $ (36) $ (232)
                
Duke Energy Florida [Member]
   
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
DUKE ENERGY FLORIDA              
                
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 968 $ 1,142 $ 1,332 $ 1,085 $ 4,527
Operating income (loss)  221   (53)   369   151   688
Net income (loss)  110   (57)   197   75   325
                
2012              
Operating revenues$ 1,010 $ 1,196 $ 1,388 $ 1,095 $ 4,689
Operating income (loss)  255   196   207   (29)   629
Net income (loss)  128   83   100   (45)   266
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013(a)              
Costs to achieve the merger with Duke Energy (see Note 2)$ (8) $ (11) $ (10) $ (9) $ (38)
Crystal River Unit 3 charges (see Note 4)    (295)     (57)   (352)
Levy nuclear development charges (see Note 4)    (65)       (65)
Total$ (8) $ (371) $ (10) $ (66) $ (455)
                
2012              
Costs to achieve the merger with Duke Energy (see Note 2)$ (3) $ (8) $ (37) $ (46) $ (94)
Replacement power refund (see Note 4)      (100)     (100)
Crystal River Unit 3 charges (see Note 4)        (192)   (192)
Total$ (3) $ (8) $ (137) $ (238) $ (386)
                
Duke Energy Ohio [Member]
   
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
DUKE ENERGY OHIO              
                
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 747 $ 811 $ 819 $ 868 $ 3,245
Operating (loss) income  (17)   108   116   44   251
Net (loss) income  (21)   58   59   6   102
                
2012              
Operating revenues$ 912 $ 717 $ 757 $ 766 $ 3,152
Operating income  138   95   42   74   349
Net income  74   45   14   42   175
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013(a)              
Costs to achieve Progress Energy merger (see Note 2)$ (4) $ (4) $ (4) $ (4) $ (16)
                
2012              
Costs to achieve Progress Energy merger (see Note 2)$ (1) $ (1) $ (22) $ (12) $ (36)
                
Duke Energy Indiana [Member]
   
Quarterly Financial Information Disclosure [Line Items]    
Schedule Of Quarterly Financial Information
DUKE ENERGY INDIANA              
                
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Operating revenues$ 724 $ 700 $ 755 $ 747 $ 2,926
Operating income  181   168   203   181   733
Net income  90   82   104   82   358
                
2012              
Operating revenues$ 688 $ 685 $ 718 $ 626 $ 2,717
Operating (loss) income  (272)   134   (30)   93   (75)
Net (loss) income  (167)   77   (19)   59   (50)
                
Schedule Of Unusual Or Infrequently Occurring Items
(in millions)First Quarter Second Quarter Third Quarter Fourth Quarter Total
2013              
Costs to achieve Progress Energy merger (see Note 2)$ (4) $ (5) $ (5) $ (5) $ (19)
                
2012              
Costs to achieve Progress Energy merger (see Note 2)$ (1) $ (1) $ (21) $ (11) $ (34)
Edwardsport IGCC charges (see Note 4)  (420)     (180)   (28)   (628)
Total$ (421) $ (1) $ (201) $ (39) $ (662)