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]
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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.

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