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Investments in Debt and Equity Securities (Tables)
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9 Months Ended |
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Sep. 30, 2014
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| Schedule of Available-for-sale Securities [Line Items] |
|
| Available-for-sale Securities |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2014 | | December 31, 2013 | (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 | $ | — |
| | $ | — |
| | $ | 74 |
| | $ | — |
| | $ | — |
| | $ | 110 |
| Equity securities | 1,943 |
| | 28 |
| | 3,825 |
| | 1,813 |
| | 10 |
| | 3,579 |
| Corporate debt securities | 13 |
| | 3 |
| | 493 |
| | 8 |
| | 6 |
| | 400 |
| Municipal bonds | 5 |
| | 1 |
| | 132 |
| | 2 |
| | 6 |
| | 160 |
| U.S. government bonds | 12 |
| | 4 |
| | 713 |
| | 7 |
| | 12 |
| | 730 |
| Other debt securities | — |
| | 1 |
| | 137 |
| | 22 |
| | 2 |
| | 154 |
| Total NDTF | $ | 1,973 |
| | $ | 37 |
| | $ | 5,374 |
| | $ | 1,852 |
| | $ | 36 |
| | $ | 5,133 |
| Other Investments | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 16 |
| | $ | — |
| | $ | — |
| | $ | 21 |
| Equity securities | 32 |
| | — |
| | 95 |
| | 29 |
| | — |
| | 91 |
| Corporate debt securities | 2 |
| | — |
| | 68 |
| | 1 |
| | 1 |
| | 99 |
| Municipal bonds | 3 |
| | — |
| | 82 |
| | 2 |
| | 2 |
| | 79 |
| U.S. government bonds | — |
| | — |
| | 16 |
| | — |
| | — |
| | 17 |
| Other debt securities | 1 |
| | 5 |
| | 96 |
| | — |
| | 8 |
| | 111 |
| Total Other Investments(a) | $ | 38 |
| | $ | 5 |
| | $ | 373 |
| | $ | 32 |
| | $ | 11 |
| | $ | 418 |
| Total Investments | $ | 2,011 |
| | $ | 42 |
| | $ | 5,747 |
| | $ | 1,884 |
| | $ | 47 |
| | $ | 5,551 |
|
(a) These amounts are recorded in Other with Investments and Other Assets on the Condensed Consolidated Balance Sheets |
| Investments Classified by Contractual Maturity Date |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | September 30, 2014 |
| Due in one year or less | $ | 33 |
| Due after one through five years | 452 |
| Due after five through 10 years | 457 |
| Due after 10 years | 795 |
| Total | $ | 1,737 |
|
|
| Schedule of Realized Gain (Loss) |
Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows. | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | (in millions) | 2014 |
| | 2013 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 28 |
| | $ | 72 |
| | $ | 90 |
| | $ | 135 |
| Realized losses | 51 |
| | 16 |
| | 57 |
| | 38 |
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Duke Energy Carolinas [Member]
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|
| Schedule of Available-for-sale Securities [Line Items] |
|
| Available-for-sale Securities |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2014 | | December 31, 2013 | (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 |
| | $ | — |
| | $ | — |
| | $ | 42 |
| Equity securities | 1,046 |
| | 17 |
| | 2,124 |
| | 974 |
| | 6 |
| | 1,964 |
| Corporate debt securities | 7 |
| | 3 |
| | 345 |
| | 5 |
| | 5 |
| | 274 |
| Municipal bonds | 1 |
| | — |
| | 22 |
| | — |
| | 2 |
| | 54 |
| U.S. government bonds | 4 |
| | 2 |
| | 317 |
| | 3 |
| | 7 |
| | 354 |
| Other debt securities | — |
| | 1 |
| | 122 |
| | 22 |
| | 2 |
| | 146 |
| Total NDTF | $ | 1,058 |
| | $ | 23 |
| | $ | 2,969 |
| | $ | 1,004 |
| | $ | 22 |
| | $ | 2,834 |
| Other Investments | | | | | | | | | | | | Other debt securities | $ | — |
| | $ | 1 |
| | $ | 3 |
| | $ | — |
| | $ | 1 |
| | $ | 3 |
| Total Other Investments(a) | $ | — |
| | $ | 1 |
| | $ | 3 |
| | $ | — |
| | $ | 1 |
| | $ | 3 |
| Total Investments | $ | 1,058 |
| | $ | 24 |
| | $ | 2,972 |
| | $ | 1,004 |
| | $ | 23 |
| | $ | 2,837 |
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(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. |
| Investments Classified by Contractual Maturity Date |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | September 30, 2014 |
| Due in one year or less | $ | 2 |
| Due after one through five years | 171 |
| Due after five through 10 years | 256 |
| Due after 10 years | 380 |
| Total | $ | 809 |
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|
| Schedule of Realized Gain (Loss) |
Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows. | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | (in millions) | 2014 |
| | 2013 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 20 |
| | $ | 49 |
| | $ | 72 |
| | $ | 95 |
| Realized losses | 48 |
| | 1 |
| | 50 |
| | 11 |
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Progress Energy [Member]
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|
| Schedule of Available-for-sale Securities [Line Items] |
|
| Available-for-sale Securities |
The following table presents the estimated fair value investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2014 | | December 31, 2013 | (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 | $ | — |
| | $ | — |
| | $ | 35 |
| | $ | — |
| | $ | — |
| | $ | 68 |
| Equity securities | 897 |
| | 11 |
| | 1,701 |
| | 839 |
| | 4 |
| | 1,615 |
| Corporate debt securities | 6 |
| | — |
| | 148 |
| | 3 |
| | 1 |
| | 126 |
| Municipal bonds | 4 |
| | 1 |
| | 110 |
| | 2 |
| | 4 |
| | 106 |
| U.S. government bonds | 8 |
| | 2 |
| | 396 |
| | 4 |
| | 5 |
| | 376 |
| Other debt securities | — |
| | — |
| | 15 |
| | — |
| | — |
| | 8 |
| Total NDTF | $ | 915 |
| | $ | 14 |
| | $ | 2,405 |
| | $ | 848 |
| | $ | 14 |
| | $ | 2,299 |
| Other Investments | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 15 |
| | $ | — |
| | $ | — |
| | $ | 20 |
| Municipal bonds | 3 |
| | — |
| | 43 |
| | 1 |
| | — |
| | 39 |
| Total Other Investments(a) | $ | 3 |
| | $ | — |
| | $ | 58 |
| | $ | 1 |
| | $ | — |
| | $ | 59 |
| Total Investments | $ | 918 |
| | $ | 14 |
| | $ | 2,463 |
| | $ | 849 |
| | $ | 14 |
| | $ | 2,358 |
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(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. |
| Investments Classified by Contractual Maturity Date |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | September 30, 2014 |
| Due in one year or less | $ | 21 |
| Due after one through five years | 218 |
| Due after five through 10 years | 145 |
| Due after 10 years | 328 |
| Total | $ | 712 |
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|
| Schedule of Realized Gain (Loss) |
Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows. | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | (in millions) | 2014 |
| | 2013 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 8 |
| | $ | 22 |
| | $ | 17 |
| | $ | 37 |
| Realized losses | 3 |
| | 11 |
| | 6 |
| | 20 |
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Duke Energy Progress [Member]
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|
| Schedule of Available-for-sale Securities [Line Items] |
|
| Available-for-sale Securities |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2014 | | December 31, 2013 | (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 | $ | — |
| | $ | — |
| | $ | 28 |
| | $ | — |
| | $ | — |
| | $ | 48 |
| Equity securities | 574 |
| | 7 |
| | 1,127 |
| | 535 |
| | 3 |
| | 1,069 |
| Corporate debt securities | 4 |
| | — |
| | 95 |
| | 3 |
| | 1 |
| | 80 |
| Municipal bonds | 4 |
| | 1 |
| | 108 |
| | 2 |
| | 4 |
| | 104 |
| U.S. government bonds | 6 |
| | 2 |
| | 257 |
| | 4 |
| | 3 |
| | 232 |
| Other debt securities | — |
| | — |
| | 8 |
| | — |
| | — |
| | 5 |
| Total NDTF | $ | 588 |
| | $ | 10 |
| | $ | 1,623 |
| | $ | 544 |
| | $ | 11 |
| | $ | 1,538 |
| Other Investments | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 2 |
| | $ | — |
| | $ | — |
| | $ | 2 |
| Total Other Investments(a) | $ | — |
| | $ | — |
| | $ | 2 |
| | $ | — |
| | $ | — |
| | $ | 2 |
| Total Investments | $ | 588 |
| | $ | 10 |
| | $ | 1,625 |
| | $ | 544 |
| | $ | 11 |
| | $ | 1,540 |
|
(a) These amounts are recorded in Other with Investments and Other Assets on the Condensed Consolidated Balance Sheets. |
| Investments Classified by Contractual Maturity Date |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | September 30, 2014 |
| Due in one year or less | $ | 10 |
| Due after one through five years | 147 |
| Due after five through 10 years | 94 |
| Due after 10 years | 217 |
| Total | $ | 468 |
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|
| Schedule of Realized Gain (Loss) |
Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows. | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | (in millions) | 2014 |
| | 2013 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 4 |
| | $ | 7 |
| | $ | 11 |
| | $ | 15 |
| Realized losses | 2 |
| | 2 |
| | 4 |
| | 6 |
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Duke Energy Florida [Member]
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
| Available-for-sale Securities |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2014 | | December 31, 2013 | (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 | $ | — |
| | $ | — |
| | $ | 7 |
| | $ | — |
| | $ | — |
| | $ | 20 |
| Equity securities | 323 |
| | 4 |
| | 574 |
| | 304 |
| | 1 |
| | 546 |
| Corporate debt securities | 2 |
| | — |
| | 53 |
| | — |
| | — |
| | 46 |
| Municipal bonds | — |
| | — |
| | 2 |
| | — |
| | — |
| | 2 |
| U.S. government bonds | 2 |
| | — |
| | 139 |
| | — |
| | 2 |
| | 144 |
| Other debt securities | — |
| | — |
| | 7 |
| | — |
| | — |
| | 3 |
| Total NDTF | $ | 327 |
| | $ | 4 |
| | $ | 782 |
| | $ | 304 |
| | $ | 3 |
| | $ | 761 |
| Other Investments | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| | $ | — |
| | $ | 3 |
| Municipal bonds | 3 |
| | — |
| | 43 |
| | 1 |
| | — |
| | 39 |
| Total Other Investments(a) | $ | 3 |
| | $ | — |
| | $ | 43 |
| | $ | 1 |
| | $ | — |
| | $ | 42 |
| Total Investments | $ | 330 |
| | $ | 4 |
| | $ | 825 |
| | $ | 305 |
| | $ | 3 |
| | $ | 803 |
|
(a) These amounts are recorded in Other with Investments and Other Assets on the Condensed Consolidated Balance Sheets. |
| Investments Classified by Contractual Maturity Date |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | September 30, 2014 |
| Due in one year or less | $ | 11 |
| Due after one through five years | 71 |
| Due after five through 10 years | 51 |
| Due after 10 years | 111 |
| Total | $ | 244 |
|
|
| Schedule of Realized Gain (Loss) |
Realized gains and losses, which were determined on a specific identification basis, from sales of available-for-sale securities were as follows. | | | | | | | | | | | | | | | | | | Three Months Ended September 30, | | Nine Months Ended September 30, | (in millions) | 2014 |
| | 2013 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 3 |
| | $ | 14 |
| | $ | 5 |
| | $ | 22 |
| Realized losses | 1 |
| | 9 |
| | 2 |
| | 13 |
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Duke Energy Indiana [Member]
|
|
| Schedule of Available-for-sale Securities [Line Items] |
|
| Available-for-sale Securities |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | September 30, 2014 | | December 31, 2013 | (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 | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 1 |
| | $ | — |
| | $ | — |
| | $ | 1 |
| Equity securities | 26 |
| | — |
| | 68 |
| | 24 |
| | — |
| | 65 |
| Municipal bonds | — |
| | — |
| | 30 |
| | — |
| | 1 |
| | 28 |
| Total Other Investments(a) | $ | 26 |
| | $ | — |
| | $ | 99 |
| | $ | 24 |
| | $ | 1 |
| | $ | 94 |
| Total Investments | $ | 26 |
| | $ | — |
| | $ | 99 |
| | $ | 24 |
| | $ | 1 |
| | $ | 94 |
|
(a) These amounts are recorded in Other within Investments and Other Assets on the Condensed Consolidated Balance Sheets. |
| Investments Classified by Contractual Maturity Date |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | September 30, 2014 |
| Due in one year or less | $ | 1 |
| Due after one through five years | 18 |
| Due after five through 10 years | 8 |
| Due after 10 years | 3 |
| Total | $ | 30 |
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