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Property, Plant & Equipment (Tables)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19
  
Duke Energy Carolinas [Member]
    
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19
  
Progress Energy [Member]
    
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19
  
Progress Energy Carolinas [Member]
    
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19
  
Progress Energy Florida [Member]
    
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19
  
Duke Energy Ohio [Member]
    
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19
  
Duke Energy Indiana [Member]
    
Public Utility, Property, Plant and Equipment [Line Items]    
Schedule Of Property, Plant And Equipment
                   
     December 31, 2012
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 1,368$ 378$ 618$ 380$ 239$ 136$ 90
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  73,181  29,269  30,250  18,009  12,041  3,774  8,622
 Natural gas transmission and distribution12-60  2,026  ―  ―  ―  ―  2,026  ―
 Other buildings and improvements2-100  1,319  444  609  283  318  125  149
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  6,055  ―  ―  ―  ―  3,870  ―
 Other buildings and improvements9-90  2,940  ―  ―  ―  ―  191  ―
Nuclear fuel -   2,127  1,277  850  850  ―  ―  ―
Equipment1-34  1,448  279  604  336  90  255  141
Construction in process -   6,655  1,996  1,424  946  474  204  2,836
Other5-60  3,272  547  791  380  270  243  174
Total property, plant and equipment(a)     100,391  34,190  35,146  21,184  13,432  10,824  12,012
Total accumulated depreciation - regulated(b)(c)(d)     (29,471)  (11,437)  (12,512)  (8,185)  (4,072)  (1,995)  (3,692)
Total accumulated depreciation - unregulated(c)(d)     (2,498)  ―  ―  ―  ―  (703)  ―
Generation facilities to be retired, net     136  73  63  63  ―  ―  ―
Total net property, plant and equipment   $ 68,558$ 22,826$ 22,697$ 13,062$ 9,360$ 8,126$ 8,320
                   
(a)Includes capitalized leases of $1,844 million, $53 million, $339 million, $150 million, $189 million, $86 million, and $28 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively, primarily in regulated plant. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $49 million, an insignificant amount and $48 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $857 million, $557 million, $300 million and $300 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy and Progress Energy Carolinas, respectively.
(c)Includes accumulated amortization of capitalized leases of $34 million, $3 million, $12 million and $5 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $103 million and an insignificant amount at December 31, 2012 at Duke Energy and Progress Energy, respectively.
                   
     December 31, 2011
(in millions)Estimated Useful Life (Years) Duke Energy Duke Energy Carolinas Progress Energy Progress Energy Carolinas Progress Energy Florida Duke Energy Ohio Duke Energy Indiana
Land   $ 745$ 372$ 595$ 367$ 228$ 135$ 88
Plant - Regulated                 
 Electric generation, distribution and transmission2-138  38,171  26,307  28,824  16,078  12,546  3,595  8,269
 Natural gas transmission and distribution12-60  1,927  ―  ―  ―  ―  1,927  ―
 Other buildings and improvements9-100  672  428  473  138  327  106  138
Plant - Unregulated                 
 Electric generation, distribution and transmission2-100  5,464  ―  ―  ―  ―  3,997  ―
 Other buildings and improvements9-44  2,095  ―  ―  ―  ―  192  ―
Nuclear fuel -   1,213  1,213  1,161  862  299  ―  ―
Equipment3-33  863  248  553  318  82  168  134
Construction in process -   7,664  3,774  2,454  1,294  1,155  255  2,992
Other5-60  2,476  498  753  326  289  257  170
Total property, plant and equipment(a)     61,290  32,840  34,813  19,383  14,926  10,632  11,791
Total accumulated depreciation - regulated(b)(c)(d)     (16,550)  (11,269)  (12,684)  (7,991)  (4,474)  (1,916)  (3,393)
Total accumulated depreciation - unregulated(c)(d)     (2,159)  ―  ―  ―  ―  (678)  ―
Generation facilities to be retired, net     80  80  163  163  ―  ―  ―
Total net property, plant and equipment   $ 42,661$ 21,651$ 22,292$ 11,555$ 10,452$ 8,038$ 8,398
                   
(a)Includes capitalized leases of $444 million, $53 million, $211 million, $12 million, $199 million, $82 million, and $33 million at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas, Progress Energy Florida, Duke Energy Ohio, and Duke Energy Indiana, respectively. The Progress Energy, Progress Energy Carolinas and Progress Energy Florida amounts are net of $56 million, $18 million and $38 million, respectively, of accumulated amortization of capitalized leases.
(b)Includes $578 million, $578 million, $394 million, $322 million and $72 million of accumulated amortization of nuclear fuel at Duke Energy, Duke Energy Carolinas, Progress Energy, Progress Energy Carolinas and Progress Energy Florida, respectively.
(c)Includes accumulated amortization of capitalized leases of $28 million, an insignificant amount, $11 million and $6 million at Duke Energy, Duke Energy Carolinas, Duke Energy Ohio, and Duke Energy Indiana, respectively.
(d)Includes accumulated depreciation of VIEs of $62 million and an insignificant amount at December 31, 2011 at Duke Energy and Progress Energy, respectively.
Schedule Of Capitalized Interest
 The following table presents capitalized interest, which includes the debt component of AFUDC.
  Year Ended December 31,
(in millions) 2012 2011 2010
Duke Energy$ 177$ 166$ 167
Duke Energy Carolinas  72  78  83
Progress Energy  41  35  32
Progress Energy Carolinas  23  20  19
Progress Energy Florida  18  15  13
Duke Energy Ohio  15  9  8
Duke Energy Indiana  39  33  19