Investments in Debt and Equity Securities (Tables)
|
12 Months Ended |
Dec. 31, 2014
|
Schedule of Available-for-sale Securities [Line Items] |
|
Available-For-Sale Investments |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 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 | $ | — |
| | $ | — |
| | $ | 136 |
| | $ | — |
| | $ | — |
| | $ | 110 |
| Equity securities | 1,926 |
| | 29 |
| | 3,650 |
| | 1,813 |
| | 10 |
| | 3,579 |
| Corporate debt securities | 14 |
| | 2 |
| | 454 |
| | 8 |
| | 6 |
| | 400 |
| Municipal bonds | 5 |
| | — |
| | 184 |
| | 2 |
| | 6 |
| | 160 |
| U.S. government bonds | 19 |
| | 2 |
| | 978 |
| | 7 |
| | 12 |
| | 730 |
| Other debt securities | 1 |
| | 2 |
| | 147 |
| | 22 |
| | 2 |
| | 154 |
| Total NDTF | 1,965 |
| | 35 |
| | 5,549 |
| | 1,852 |
| | 36 |
| | 5,133 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | — |
| | — |
| | 15 |
| | — |
| | — |
| | 21 |
| Equity securities | 34 |
| | — |
| | 96 |
| | 29 |
| | — |
| | 91 |
| Corporate debt securities | 1 |
| | 1 |
| | 58 |
| | 1 |
| | 1 |
| | 99 |
| Municipal bonds | 3 |
| | 1 |
| | 76 |
| | 2 |
| | 2 |
| | 79 |
| U.S. government bonds | — |
| | — |
| | 27 |
| | — |
| | — |
| | 17 |
| Other debt securities | 1 |
| | 1 |
| | 80 |
| | — |
| | 8 |
| | 111 |
| Total Other Investments(a) | 39 |
| | 3 |
| | 352 |
| | 32 |
| | 11 |
| | 418 |
| Total Investments | $ | 2,004 |
| | $ | 38 |
| | $ | 5,901 |
| | $ | 1,884 |
| | $ | 47 |
| | $ | 5,551 |
|
| | (a) | These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | (in millions) | December 31, 2014 |
| Due in one year or less | 178 |
| Due after one through five years | 571 |
| Due after five through 10 years | 464 |
| Due after 10 years | 791 |
| Total | 2,004 |
|
|
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. | | | | | | | | | | | | | | Years Ended December 31, | (in millions) | 2014 |
| | 2013 |
| | 2012 |
| Realized gains | $ | 271 |
| | $ | 209 |
| | $ | 117 |
| Realized losses | 105 |
| | 65 |
| | 19 |
|
|
Duke Energy Carolinas [Member] |
|
Schedule of Available-for-sale Securities [Line Items] |
|
Available-For-Sale Investments |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 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 | $ | — |
| | $ | — |
| | $ | 51 |
| | $ | — |
| | $ | — |
| | $ | 42 |
| Equity securities | 1,102 |
| | 17 |
| | 2,162 |
| | 974 |
| | 6 |
| | 1,964 |
| Corporate debt securities | 8 |
| | 2 |
| | 316 |
| | 5 |
| | 5 |
| | 274 |
| Municipal bonds | 1 |
| | — |
| | 62 |
| | — |
| | 2 |
| | 54 |
| U.S. government bonds | 7 |
| | 1 |
| | 308 |
| | 3 |
| | 7 |
| | 354 |
| Other debt securities | 1 |
| | 2 |
| | 133 |
| | 22 |
| | 2 |
| | 146 |
| Total NDTF | 1,119 |
| | 22 |
| | 3,032 |
| | 1,004 |
| | 22 |
| | 2,834 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Other debt securities | — |
| | 1 |
| | 3 |
| | — |
| | 1 |
| | 3 |
| Total Other Investments(a) | — |
| | 1 |
| | 3 |
| | — |
| | 1 |
| | 3 |
| Total Investments | $ | 1,119 |
| | $ | 23 |
| | $ | 3,035 |
| | $ | 1,004 |
| | $ | 23 |
| | $ | 2,837 |
|
| | (a) | These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2014 |
| Due in one year or less | $ | 1 |
| Due after one through five years | 155 |
| Due after five through 10 years | 257 |
| Due after 10 years | 409 |
| Total | $ | 822 |
|
|
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. | | | | | | | | | | | | | | Years Ended December 31, | (in millions) | 2014 |
| | 2013 |
| | 2012 |
| Realized gains | $ | 109 |
| | $ | 115 |
| | $ | 89 |
| Realized losses | 93 |
| | 12 |
| | 6 |
|
|
Progress Energy [Member] |
|
Schedule of Available-for-sale Securities [Line Items] |
|
Available-For-Sale Investments |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 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 | $ | — |
| | $ | — |
| | $ | 85 |
| | $ | — |
| | $ | — |
| | $ | 68 |
| Equity securities | 824 |
| | 12 |
| | 1,488 |
| | 839 |
| | 4 |
| | 1,615 |
| Corporate debt securities | 6 |
| | — |
| | 138 |
| | 3 |
| | 1 |
| | 126 |
| Municipal bonds | 4 |
| | — |
| | 122 |
| | 2 |
| | 4 |
| | 106 |
| U.S. government bonds | 12 |
| | 1 |
| | 670 |
| | 4 |
| | 5 |
| | 376 |
| Other debt securities | — |
| | — |
| | 14 |
| | — |
| | — |
| | 8 |
| Total NDTF | 846 |
| | 13 |
| | 2,517 |
| | 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 | $ | 849 |
| | $ | 13 |
| | $ | 2,575 |
| | $ | 849 |
| | $ | 14 |
| | $ | 2,358 |
|
| | (a) | These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2014 |
| Due in one year or less | $ | 161 |
| Due after one through five years | 350 |
| Due after five through 10 years | 157 |
| Due after 10 years | 319 |
| Total | $ | 987 |
|
|
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. | | | | | | | | | | | | | | Years Ended December 31, | (in millions) | 2014 |
| | 2013 |
| | 2012 |
| Realized gains | $ | 157 |
| | $ | 90 |
| | $ | 34 |
| Realized losses | 11 |
| | 46 |
| | 18 |
|
|
Duke Energy Progress [Member] |
|
Schedule of Available-for-sale Securities [Line Items] |
|
Available-For-Sale Investments |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 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 | $ | — |
| | $ | — |
| | $ | 50 |
| | $ | — |
| | $ | — |
| | $ | 48 |
| Equity securities | 612 |
| | 10 |
| | 1,171 |
| | 535 |
| | 3 |
| | 1,069 |
| Corporate debt securities | 5 |
| | — |
| | 97 |
| | 3 |
| | 1 |
| | 80 |
| Municipal bonds | 4 |
| | — |
| | 120 |
| | 2 |
| | 4 |
| | 104 |
| U.S. government bonds | 9 |
| | 1 |
| | 265 |
| | 4 |
| | 3 |
| | 232 |
| Other debt securities | — |
| | — |
| | 8 |
| | — |
| | — |
| | 5 |
| Total NDTF | 630 |
| | 11 |
| | 1,711 |
| | 544 |
| | 11 |
| | 1,538 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | — |
| | — |
| | — |
| | — |
| | — |
| | 2 |
| Total Other Investments(a) | — |
| | — |
| | — |
| | — |
| | — |
| | 2 |
| Total Investments | $ | 630 |
| | $ | 11 |
| | $ | 1,711 |
| | $ | 544 |
| | $ | 11 |
| | $ | 1,540 |
|
| | (a) | These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2014 |
| Due in one year or less | $ | 14 |
| Due after one through five years | 140 |
| Due after five through 10 years | 109 |
| Due after 10 years | 227 |
| Total | $ | 490 |
|
|
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. | | | | | | | | | | | | | | Years Ended December 31, | (in millions) | 2014 |
| | 2013 |
| | 2012 |
| Realized gains | $ | 19 |
| | $ | 58 |
| | $ | 21 |
| Realized losses | 5 |
| | 26 |
| | 8 |
|
|
Duke Energy Florida [Member] |
|
Schedule of Available-for-sale Securities [Line Items] |
|
Available-For-Sale Investments |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 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 |
| | $ | — |
| | $ | — |
| | $ | 20 |
| Equity securities | 212 |
| | 2 |
| | 317 |
| | 304 |
| | 1 |
| | 546 |
| Corporate debt securities | 1 |
| | — |
| | 41 |
| | — |
| | — |
| | 46 |
| Municipal bonds | — |
| | — |
| | 2 |
| | — |
| | — |
| | 2 |
| U.S. government bonds | 3 |
| | — |
| | 405 |
| | — |
| | 2 |
| | 144 |
| Other debt securities | — |
| | — |
| | 6 |
| | — |
| | — |
| | 3 |
| Total NDTF | 216 |
| | 2 |
| | 806 |
| | 304 |
| | 3 |
| | 761 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | — |
| | — |
| | 1 |
| | — |
| | — |
| | 3 |
| Municipal bonds | 3 |
| | — |
| | 43 |
| | 1 |
| | — |
| | 39 |
| Total Other Investments(a) | 3 |
| | — |
| | 44 |
| | 1 |
| | — |
| | 42 |
| Total Investments | $ | 219 |
| | $ | 2 |
| | $ | 850 |
| | $ | 305 |
| | $ | 3 |
| | $ | 803 |
|
| | (a) | These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2014 |
| Due in one year or less | $ | 147 |
| Due after one through five years | 210 |
| Due after five through 10 years | 48 |
| Due after 10 years | 92 |
| Total | $ | 497 |
|
|
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. | | | | | | | | | | | | | | Years Ended December 31, | (in millions) | 2014 |
| | 2013 |
| | 2012 |
| Realized gains | $ | 138 |
| | $ | 32 |
| | $ | 13 |
| Realized losses | 5 |
| | 20 |
| | 9 |
|
|
Duke Energy Indiana [Member] |
|
Schedule of Available-for-sale Securities [Line Items] |
|
Available-For-Sale Investments |
The following table presents the estimated fair value of investments in available-for-sale securities. | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 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 |
| Equity securities | 28 |
| | — |
| | 71 |
| | 24 |
| | — |
| | 65 |
| Municipal bonds | — |
| | 1 |
| | 30 |
| | — |
| | 1 |
| | 28 |
| Total Other Investments(a) | 28 |
| | 1 |
| | 101 |
| | 24 |
| | 1 |
| | 94 |
| Total Investments | $ | 28 |
| | $ | 1 |
| | $ | 101 |
| | $ | 24 |
| | $ | 1 |
| | $ | 94 |
|
| | (a) | These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2014 |
| Due in one year or less | $ | 1 |
| Due after one through five years | 17 |
| Due after five through 10 years | 8 |
| Due after 10 years | 4 |
| Total | $ | 30 |
|
|