v2.4.0.6

Investments In Debt And Equity Securities (Tables) | 3 Months Ended
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Mar. 31, 2013
Schedule of Investments [Line Items] |
Available-For-Sale Investments |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value
NDTF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 91 |  | $ | ― |  | $ | ― |  | $ | 105
Equity securities |  | 1,380 |  |  | 19 |  |  | 3,104 |  |  | 1,132 |  |  | 19 |  |  | 2,837
Corporate debt securities |  | 17 |  |  | 2 |  |  | 333 |  |  | 21 |  |  | 1 |  |  | 338
Municipal bonds |  | 10 |  |  | 1 |  |  | 189 |  |  | 12 |  |  | 1 |  |  | 194
U.S. government bonds |  | 20 |  |  | 2 |  |  | 666 |  |  | 24 |  |  | 1 |  |  | 625
Other debt securities |  | 12 |  |  | 2 |  |  | 163 |  |  | 10 |  |  | 1 |  |  | 164
Total NDTF | $ | 1,439 |  | $ | 26 |  | $ | 4,546 |  | $ | 1,199 |  | $ | 23 |  | $ | 4,263
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 21 |  | $ | ― |  | $ | ― |  | $ | 17
Equity securities |  | 16 |  |  | ― |  |  | 84 |  |  | 10 |  |  | ― |  |  | 63
Corporate debt securities |  | 1 |  |  | ― |  |  | 347 |  |  | 2 |  |  | ― |  |  | 381
Municipal bonds |  | 4 |  |  | 1 |  |  | 75 |  |  | 4 |  |  | 1 |  |  | 70
U.S. government bonds |  | ― |  |  | ― |  |  | 73 |  |  | ― |  |  | ― |  |  | 23
Other debt securities |  | 1 |  |  | ― |  |  | 103 |  |  | 1 |  |  | ― |  |  | 86
Auction rate securities |  | ― |  |  | 6 |  |  | 28 |  |  | ― |  |  | 6 |  |  | 29
Total Other Investments(a) | $ | 22 |  | $ | 7 |  | $ | 731 |  | $ | 17 |  | $ | 7 |  | $ | 669
Total Investments | $ | 1,461 |  | $ | 33 |  | $ | 5,277 |  | $ | 1,216 |  | $ | 30 |  | $ | 4,932
(a) | These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.
Summarizes The Maturity Date For Debt Securities |
(in millions) | March 31, 2013
Due in one year or less |  | $ | 328
Due after one through five years |  |  | 435
Due after five through 10 years |  |  | 398
Due after 10 years |  |  | 788
Total |  | $ | 1,949
Schedule of realized gain (loss) |
|  |  | Three Months Ended March 31,
(in millions) |  | 2013 |  | 2012
Realized gains |  | $ | 31 |  | $ | 21
Realized losses |  |  | 7 |  |  | 2
Duke Energy Carolinas [Member] |
Schedule of Investments [Line Items] |
Available-For-Sale Investments |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value
NDTF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 41 |  | $ | ― |  | $ | ― |  | $ | 40
Equity securities |  | 736 |  |  | 4 |  |  | 1,735 |  |  | 600 |  |  | 5 |  |  | 1,592
Corporate debt securities |  | 9 |  |  | 2 |  |  | 239 |  |  | 11 |  |  | 1 |  |  | 250
Municipal bonds |  | ― |  |  | ― |  |  | 21 |  |  | 2 |  |  | ― |  |  | 40
U.S. government bonds |  | 8 |  |  | 1 |  |  | 345 |  |  | 10 |  |  | ― |  |  | 304
Other debt securities |  | 11 |  |  | 2 |  |  | 136 |  |  | 9 |  |  | 2 |  |  | 135
Total NDTF | $ | 764 |  | $ | 9 |  | $ | 2,517 |  | $ | 632 |  | $ | 8 |  | $ | 2,361
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Auction rate securities | $ | ― |  | $ | 1 |  | $ | 3 |  | $ | ― |  | $ | 1 |  | $ | 3
Total Other Investments(a) | $ | ― |  | $ | 1 |  | $ | 3 |  | $ | ― |  | $ | 1 |  | $ | 3
Total Investments | $ | 764 |  | $ | 10 |  | $ | 2,520 |  | $ | 632 |  | $ | 9 |  | $ | 2,364
(a) | These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.
Summarizes The Maturity Date For Debt Securities |
(in millions) | March 31, 2013
Due in one year or less |  | $ | 18
Due after one through five years |  |  | 173
Due after five through 10 years |  |  | 185
Due after 10 years |  |  | 365
Total |  | $ | 741
Schedule of realized gain (loss) |
|  |  | Three Months Ended March 31,
(in millions) |  | 2013 |  | 2012
Realized gains |  | $ | 25 |  | $ | 20
Realized losses |  |  | 4 |  |  | 2
Progress Energy [Member] |
Schedule of Investments [Line Items] |
Available-For-Sale Investments |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value
NDTF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 50 |  | $ | ― |  | $ | ― |  | $ | 65
Equity securities |  | 644 |  |  | 15 |  |  | 1,369 |  |  | 532 |  |  | 14 |  |  | 1,245
Corporate debt securities |  | 8 |  |  | ― |  |  | 94 |  |  | 9 |  |  | ― |  |  | 89
Municipal bonds |  | 10 |  |  | 1 |  |  | 168 |  |  | 11 |  |  | 1 |  |  | 154
U.S. government bonds |  | 12 |  |  | 1 |  |  | 321 |  |  | 14 |  |  | ― |  |  | 321
Other debt securities |  | 1 |  |  | ― |  |  | 27 |  |  | 1 |  |  | ― |  |  | 28
Total NDTF | $ | 675 |  | $ | 17 |  | $ | 2,029 |  | $ | 567 |  | $ | 15 |  | $ | 1,902
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 21 |  | $ | ― |  | $ | ― |  | $ | 17
Municipal bonds |  | 3 |  |  | ― |  |  | 40 |  |  | 3 |  |  | ― |  |  | 40
Total Other Investments(a) | $ | 3 |  | $ | ― |  | $ | 61 |  | $ | 3 |  | $ | ― |  | $ | 57
Total Investments | $ | 678 |  | $ | 17 |  | $ | 2,090 |  | $ | 570 |  | $ | 15 |  | $ | 1,959
(a) | These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.
Summarizes The Maturity Date For Debt Securities |
(in millions) | March 31, 2013
Due in one year or less |  | $ | 26
Due after one through five years |  |  | 145
Due after five through 10 years |  |  | 164
Due after 10 years |  |  | 315
Total |  | $ | 650
Schedule of realized gain (loss) |
|  |  | Three Months Ended March 31,
(in millions) |  | 2013 |  | 2012
Realized gains |  | $ | 5 |  | $ | 7
Realized losses |  |  | 2 |  |  | 3
Duke Energy Progress [Member] |
Schedule of Investments [Line Items] |
Available-For-Sale Investments |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value
NDTF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 39 |  | $ | ― |  | $ | ― |  | $ | 55
Equity securities |  | 413 |  |  | 11 |  |  | 894 |  |  | 337 |  |  | 11 |  |  | 811
Corporate debt securities |  | 6 |  |  | ― |  |  | 84 |  |  | 8 |  |  | ― |  |  | 78
Municipal bonds |  | 4 |  |  | ― |  |  | 95 |  |  | 4 |  |  | ― |  |  | 80
U.S. government bonds |  | 11 |  |  | 1 |  |  | 233 |  |  | 13 |  |  | ― |  |  | 241
Other debt securities |  | 1 |  |  | ― |  |  | 11 |  |  | 1 |  |  | ― |  |  | 10
Total NDTF | $ | 435 |  | $ | 12 |  | $ | 1,356 |  | $ | 363 |  | $ | 11 |  | $ | 1,275
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 4 |  | $ | ― |  | $ | ― |  | $ | 3
Total Other Investments(a) | $ | ― |  | $ | ― |  | $ | 4 |  | $ | ― |  | $ | ― |  | $ | 3
Total Investments | $ | 435 |  | $ | 12 |  | $ | 1,360 |  | $ | 363 |  | $ | 11 |  | $ | 1,278
(a) | These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.
Summarizes The Maturity Date For Debt Securities |
(in millions) | March 31, 2013
Due in one year or less |  | $ | 11
Due after one through five years |  |  | 128
Due after five through 10 years |  |  | 76
Due after 10 years |  |  | 208
Total |  | $ | 423
Schedule of realized gain (loss) |
|  |  | Three Months Ended March 31,
(in millions) |  | 2013 |  | 2012
Realized gains |  | $ | 2 |  | $ | 5
Realized losses |  |  | 1 |  |  | 2
Duke Energy Florida [Member] |
Schedule of Investments [Line Items] |
Available-For-Sale Investments |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value
NDTF |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 11 |  | $ | ― |  | $ | ― |  | $ | 10
Equity securities |  | 231 |  |  | 4 |  |  | 475 |  |  | 194 |  |  | 4 |  |  | 434
Corporate debt securities |  | 2 |  |  | ― |  |  | 10 |  |  | 1 |  |  | ― |  |  | 11
Municipal bonds |  | 6 |  |  | 1 |  |  | 73 |  |  | 7 |  |  | ― |  |  | 74
U.S. government bonds |  | 1 |  |  | ― |  |  | 88 |  |  | 1 |  |  | ― |  |  | 80
Other debt securities |  | ― |  |  | ― |  |  | 16 |  |  | 1 |  |  | ― |  |  | 18
Total NDTF | $ | 240 |  | $ | 5 |  | $ | 673 |  | $ | 204 |  | $ | 4 |  | $ | 627
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | ― |  | $ | ― |  | $ | 3 |  | $ | ― |  | $ | ― |  | $ | 1
Municipal bonds |  | 3 |  |  | ― |  |  | 40 |  |  | 3 |  |  | ― |  |  | 40
Total Other Investments(a) | $ | 3 |  | $ | ― |  | $ | 43 |  | $ | 3 |  | $ | ― |  | $ | 41
Total Investments | $ | 243 |  | $ | 5 |  | $ | 716 |  | $ | 207 |  | $ | 4 |  | $ | 668
(a) | These amounts are recorded in Other within Investments and Other Assets on the Condensed Balance sheets.
Summarizes The Maturity Date For Debt Securities |
(in millions) | March 31, 2013
Due in one year or less |  | $ | 15
Due after one through five years |  |  | 17
Due after five through 10 years |  |  | 88
Due after 10 years |  |  | 107
Total |  | $ | 227
Schedule of realized gain (loss) |
|  |  | Three Months Ended March 31,
(in millions) |  | 2013 |  | 2012
Realized gains |  | $ | 3 |  | $ | 2
Realized losses |  |  | 1 |  |  | 1
Duke Energy Indiana [Member] |
Schedule of Investments [Line Items] |
Available-For-Sale Investments |
|  | March 31, 2013 |  | December 31, 2012
(in millions) | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value |  | Gross Unrealized Holding Gains |  | Gross Unrealized Holding Losses |  | Estimated Fair Value
Other Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities | $ | 14 |  | $ | ― |  | $ | 54 |  | $ | 9 |  | $ | ― |  | $ | 50
Municipal bonds |  | 1 |  |  | ― |  |  | 29 |  |  | 1 |  |  | ― |  |  | 28
Total Other Investments(a) | $ | 15 |  | $ | ― |  | $ | 83 |  | $ | 10 |  | $ | ― |  | $ | 78
Total Investments | $ | 15 |  | $ | ― |  | $ | 83 |  | $ | 10 |  | $ | ― |  | $ | 78
(a) | These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets.
Summarizes The Maturity Date For Debt Securities |
(in millions) | March 31, 2013
Due in one year or less |  | $ | 1
Due after one through five years |  |  | 21
Due after five through 10 years |  |  | 4
Due after 10 years |  |  | 3
Total |  | $ | 29

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- Definition Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27198-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-1 -Paragraph 21 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Staff Position (FSP) -Number FAS115-1/124-1 -Paragraph 17 -Subparagraph a, b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27337-111563 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 19, 20, 21 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62586-112803 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 + Details
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- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 + Details
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