v2.4.0.6
Condensed Consolidated Statements Of Equity (USD $)
In Millions, except Share data, unless otherwise specified
Total
Common Stock [Member]
Additional Paid In Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Foreign Currency Adjustments [Member]
Net Gains (Losses) on Cash Flow Hedges [Member]
Pension And OPEB Related Adjustments To AOCI [Member]
Common Stockholders' Equity [Member]
Noncontrolling Interest [Member]
Duke Energy Carolinas [Member]
Duke Energy Carolinas [Member]
Members Equity [Member]
Duke Energy Carolinas [Member]
Net Gains (Losses) on Cash Flow Hedges [Member]
Duke Energy Carolinas [Member]
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Progress Energy [Member]
Progress Energy [Member]
Common Stock [Member]
Progress Energy [Member]
Additional Paid In Capital [Member]
Progress Energy [Member]
Retained Earnings [Member]
Progress Energy [Member]
Net Gains (Losses) on Cash Flow Hedges [Member]
Progress Energy [Member]
Pension And OPEB Related Adjustments To AOCI [Member]
Progress Energy [Member]
Common Stockholders' Equity [Member]
Progress Energy [Member]
Noncontrolling Interest [Member]
Duke Energy Progress [Member]
Duke Energy Progress [Member]
Common Stock [Member]
Duke Energy Progress [Member]
Retained Earnings [Member]
Duke Energy Progress [Member]
Net Gains (Losses) on Cash Flow Hedges [Member]
Duke Energy Florida [Member]
Duke Energy Florida [Member]
Common Stock [Member]
Duke Energy Florida [Member]
Retained Earnings [Member]
Duke Energy Florida [Member]
Net Gains (Losses) on Cash Flow Hedges [Member]
Duke Energy Ohio [Member]
Duke Energy Ohio [Member]
Common Stock [Member]
Duke Energy Ohio [Member]
Additional Paid In Capital [Member]
Duke Energy Ohio [Member]
Retained Earnings [Member]
Duke Energy Ohio [Member]
Pension And OPEB Related Adjustments To AOCI [Member]
Duke Energy Indiana [Member]
Duke Energy Indiana [Member]
Common Stock [Member]
Duke Energy Indiana [Member]
Additional Paid In Capital [Member]
Duke Energy Indiana [Member]
Retained Earnings [Member]
Duke Energy Indiana [Member]
Net Gains (Losses) on Cash Flow Hedges [Member]
Balance at Dec. 31, 2011 $ 22,865 $ 1 $ 21,132 $ 1,873 $ (234)       $ 22,772 $ 93 $ 9,454 $ 9,473 $ (17) $ (2) $ 10,025 $ 7,418 $ 16 $ 2,752 $ (142) $ (23) $ 10,021 $ 4 $ 5,088 $ 2,148 $ 3,011 $ (71) $ 4,675 $ 1,757 $ 2,945 $ (27) $ 5,167 $ 762 $ 5,085 $ (652) $ (28) $ 3,734 $ 1 $ 1,358 $ 2,368 $ 7
Balance (in shares) at Dec. 31, 2011 445,000,000                                                                              
Net income 299     295         295 4 266 266     152               52   52   128   128   74     74   (167)     (167)  
Net income                             150     150     150 [1] 0                                    
Other comprehensive income (loss), net of tax 60       60 44 12 4 60           5       4 1 5   5     5 1     1 1       1 (1)       (1)
Common stock issuances, including dividend reinvestment and employee benefits (in shares) 1,000,000                                                                              
Common stock issuances, including dividend reinvestment and employee benefits (11)   (11)           (11)           17 12 5       17                                      
Stock-based compensation expense                                             7 7     3 3                        
Common stock dividends (335)     (335)         (335)           (184)     (184)     (184)                                      
Dividends paid to parent                                             (175)   (175)   (105)   (105)                      
Preferred stock dividends at stated rates                                             (1)   (1)   (1)   (1)                      
Transfer of Vermillion Generating Station                                                             (28)   (28)     26   26    
Distributions to noncontrolling interests                             (2)             (2)                                    
Tax dividend                                             (3)   (3)   (1)   (1)                      
Notes To Reconciliation Of Total Equity [Details]                                                                                
Net income attributable to preferred shareholders of subsidiaries excluded from reconciliation of total equity                             2                                                  
Balance at Mar. 31, 2012 22,878 1 21,121 1,833 (174)       22,781 97 9,720 9,739 (17) (2) 10,011 7,430 21 2,718 (138) (22) 10,009 2 4,973 2,155 2,884 (66) 4,700 1,760 2,966 (26) 5,214 762 5,057 (578) (27) 3,592 1 1,384 2,201 6
Balance (in shares) at Mar. 31, 2012 446,000,000                                                                              
Balance at Dec. 31, 2012 40,941 1 39,279 1,889 (306)       40,863 78     (15) (1) 10,185   7,465 2,783 (42) (25) 10,181 4 5,127 2,159 2,968   4,799 1,762 3,037   5,166 762 4,882 (477) (1) 3,708 1 1,384 2,318 5
Balance (in shares) at Dec. 31, 2012 704,000,000                           100               160,000,000       100       89,663,086         59,913,701        
Beginning Member's Equity at Dec. 31, 2012                     9,872 9,888                                                        
Net income 634     634         634   244 244     154               110   110   110   110   (21)     (21)   90     90  
Net income                             154     153     153 1                                    
Other comprehensive income (loss), net of tax 17       17 4 10 3 17           2       1 1 2   0               1       1          
Common stock issuances, including dividend reinvestment and employee benefits (in shares) 2,000,000                                                                              
Common stock issuances, including dividend reinvestment and employee benefits (16)   (16)           (16)                                                              
Common stock dividends (542)     (542)         (542)                                                              
Premium on the redemption of preferred stock of subsidiaries (3)     (3)         (3)           (3)     (3)     (3)   (2)   (2)   (1)   (1)                      
Changes in noncontrolling interest in subsidiaries (1)                 (1)                                                            
Transfer of Vermillion Generating Station                                                                       0        
Distributions to noncontrolling interests                             (3)             (3)                                    
Notes To Reconciliation Of Total Equity [Details]                                                                                
Net income attributable to preferred shareholders of subsidiaries excluded from reconciliation of total equity                             0                                                  
Balance at Mar. 31, 2013 41,030 1 39,263 1,978 (289)       40,953 77     (15) (1) 10,335   7,465 2,933 (41) (24) 10,333 2 5,235 2,159 3,076   4,908 1,762 3,146   5,146 762 4,882 (498)   3,798 1 1,384 2,408 5
Balance (in shares) at Mar. 31, 2013 706,000,000                           100               160,000,000       100       89,663,086         59,913,701        
Ending Member's Equity at Mar. 31, 2013                     $ 10,116 $ 10,132                                                        
[1] For the three months ended March 31, 2012, consolidated net income of $152 million includes $2 million attributable to preferred shareholders of subsidiaries. Income attributable to preferred shareholders of subsidiaries is not a component of total equity and is excluded from the table above.