Investments in Debt and Equity Securities (Tables)
|
12 Months Ended |
Dec. 31, 2015 |
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, 2015 | | December 31, 2014 | | Gross |
| | Gross |
| | | | Gross |
| | Gross |
| | | | Unrealized |
| | Unrealized |
| | | | Unrealized |
| | Unrealized |
| | | | Holding |
| | Holding |
| | Estimated |
| | Holding |
| | Holding |
| | Estimated |
| (in millions) | Gains |
| | Losses(b) |
| | Fair Value |
| | Gains |
| | Losses(b) |
| | Fair Value |
| NDTF | | | | | | | | | |
| | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 179 |
| | $ | — |
| | $ | — |
| | $ | 136 |
| Equity securities | 1,823 |
| | 58 |
| | 3,590 |
| | 1,926 |
| | 29 |
| | 3,650 |
| Corporate debt securities | 7 |
| | 8 |
| | 432 |
| | 14 |
| | 2 |
| | 454 |
| Municipal bonds | 5 |
| | 1 |
| | 185 |
| | 5 |
| | — |
| | 184 |
| U.S. government bonds | 11 |
| | 5 |
| | 1,254 |
| | 19 |
| | 2 |
| | 978 |
| Other debt securities | — |
| | 4 |
| | 177 |
| | 1 |
| | 2 |
| | 147 |
| Total NDTF(c) | $ | 1,846 |
| | $ | 76 |
| | $ | 5,817 |
| | $ | 1,965 |
| | $ | 35 |
| | $ | 5,549 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 29 |
| | $ | — |
| | $ | — |
| | $ | 15 |
| Equity securities | 32 |
| | 1 |
| | 95 |
| | 34 |
| | — |
| | 96 |
| Corporate debt securities | 1 |
| | 3 |
| | 92 |
| | 1 |
| | 1 |
| | 58 |
| Municipal bonds | 3 |
| | 1 |
| | 74 |
| | 3 |
| | 1 |
| | 76 |
| U.S. government bonds | — |
| | — |
| | 45 |
| | — |
| | — |
| | 27 |
| Other debt securities | — |
| | 2 |
| | 62 |
| | 1 |
| | 1 |
| | 80 |
| Total Other Investments(a) | $ | 36 |
| | $ | 7 |
| | $ | 397 |
| | $ | 39 |
| | $ | 3 |
| | $ | 352 |
| Total Investments | $ | 1,882 |
| | $ | 83 |
| | $ | 6,214 |
| | $ | 2,004 |
| | $ | 38 |
| | $ | 5,901 |
|
(a) These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. | | (b) | Substantially all these amounts are considered other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset. |
| | (c) | The increase in estimated fair value of the NDTF as of December 31, 2015, is primarily due to NDTF assets acquired with the purchase of NCEMPA's ownership interest in certain generating assets and the NDTF assets acquired in a settlement with FMJO. This is partially offset due to reimbursements from the NDTF for Duke Energy Florida's costs related to ongoing decommissioning activity of the Crystal River Unit 3 Nuclear Plant. Refer to Note 2 for further information. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | (in millions) | December 31, 2015 |
| Due in one year or less | 120 |
| Due after one through five years | 775 |
| Due after five through 10 years | 598 |
| Due after 10 years | 828 |
| Total | 2,321 |
|
|
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) | 2015 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 193 |
| | $ | 271 |
| | $ | 209 |
| Realized losses | 98 |
| | 105 |
| | 65 |
|
|
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, 2015 | | December 31, 2014 | | Gross |
| | Gross |
| | | | Gross |
| | Gross |
| | | | Unrealized |
| | Unrealized |
| | | | Unrealized |
| | Unrealized |
| | | | Holding |
| | Holding |
| | Estimated |
| | Holding |
| | Holding |
| | Estimated |
| (in millions) | Gains |
| | Losses(b) |
| | Fair Value |
| | Gains |
| | Losses(b) |
| | Fair Value |
| NDTF | | | | | | | | | | | |
| Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 34 |
| | $ | — |
| | $ | — |
| | $ | 51 |
| Equity securities | 1,021 |
| | 27 |
| | 2,094 |
| | 1,102 |
| | 17 |
| | 2,162 |
| Corporate debt securities | 3 |
| | 5 |
| | 292 |
| | 8 |
| | 2 |
| | 316 |
| Municipal bonds | 1 |
| | — |
| | 33 |
| | 1 |
| | — |
| | 62 |
| U.S. government bonds | 3 |
| | 3 |
| | 438 |
| | 7 |
| | 1 |
| | 308 |
| Other debt securities | — |
| | 4 |
| | 147 |
| | 1 |
| | 2 |
| | 133 |
| Total NDTF | $ | 1,028 |
| | $ | 39 |
| | $ | 3,038 |
| | $ | 1,119 |
| | $ | 22 |
| | $ | 3,032 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Other debt securities | $ | — |
| | $ | 1 |
| | $ | 3 |
| | $ | — |
| | $ | 1 |
| | $ | 3 |
| Total Other Investments(a) | $ | — |
| | $ | 1 |
| | $ | 3 |
| | $ | — |
| | $ | 1 |
| | $ | 3 |
| Total Investments | $ | 1,028 |
| | $ | 40 |
| | $ | 3,041 |
| | $ | 1,119 |
| | $ | 23 |
| | $ | 3,035 |
|
(a) These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. | | (b) | Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2015 |
| Due in one year or less | $ | 13 |
| Due after one through five years | 187 |
| Due after five through 10 years | 275 |
| Due after 10 years | 438 |
| Total | $ | 913 |
|
|
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) | 2015 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 158 |
| | $ | 109 |
| | $ | 115 |
| Realized losses | 83 |
| | 93 |
| | 12 |
|
|
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, 2015 | | December 31, 2014 | | Gross |
| | Gross |
| | | | Gross |
| | Gross |
| | | | Unrealized |
| | Unrealized |
| | | | Unrealized |
| | Unrealized |
| | | | Holding |
| | Holding |
| | Estimated |
| | Holding |
| | Holding |
| | Estimated |
| (in millions) | Gains |
| | Losses(b) |
| | Fair Value |
| | Gains |
| | Losses(b) |
| | Fair Value |
| NDTF | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 145 |
| | $ | — |
| | $ | — |
| | $ | 85 |
| Equity securities | 802 |
| | 31 |
| | 1,496 |
| | 824 |
| | 12 |
| | 1,488 |
| Corporate debt securities | 4 |
| | 3 |
| | 140 |
| | 6 |
| | — |
| | 138 |
| Municipal bonds | 4 |
| | 1 |
| | 152 |
| | 4 |
| | — |
| | 122 |
| U.S. government bonds | 8 |
| | 2 |
| | 816 |
| | 12 |
| | 1 |
| | 670 |
| Other debt securities | — |
| | — |
| | 30 |
| | — |
| | — |
| | 14 |
| Total NDTF(c) | $ | 818 |
| | $ | 37 |
| | $ | 2,779 |
| | $ | 846 |
| | $ | 13 |
| | $ | 2,517 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 18 |
| | $ | — |
| | $ | — |
| | $ | 15 |
| Municipal bonds | 3 |
| | — |
| | 45 |
| | 3 |
| | — |
| | 43 |
| Total Other Investments(a) | $ | 3 |
| | $ | — |
| | $ | 63 |
| | $ | 3 |
| | $ | — |
| | $ | 58 |
| Total Investments | $ | 821 |
| | $ | 37 |
| | $ | 2,842 |
| | $ | 849 |
| | $ | 13 |
| | $ | 2,575 |
|
(a) These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. | | (b) | Substantially all these amounts are considered other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset. |
| | (c) | The increase in estimated fair value of the NDTF as of December 31, 2015, is primarily due to NDTF assets acquired with the purchase of NCEMPA's ownership interest in certain generating assets and the NDTF assets acquired in a settlement with FMJO. This is partially offset due to reimbursements from the NDTF for Duke Energy Florida's costs related to ongoing decommissioning activity of the Crystal River Unit 3 Nuclear Plant. Refer to Note 2 for further information. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2015 |
| Due in one year or less | $ | 94 |
| Due after one through five years | 496 |
| Due after five through 10 years | 254 |
| Due after 10 years | 339 |
| Total | $ | 1,183 |
|
|
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) | 2015 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 33 |
| | $ | 157 |
| | $ | 90 |
| Realized losses | 13 |
| | 11 |
| | 46 |
|
|
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, 2015 | | December 31, 2014 | | Gross |
| | Gross |
| | | | Gross |
| | Gross |
| | | | Unrealized |
| | Unrealized |
| | | | Unrealized |
| | Unrealized |
| | | | Holding |
| | Holding |
| | Estimated |
| | Holding |
| | Holding |
| | Estimated |
| (in millions) | Gains |
| | Losses(b) |
| | Fair Value |
| | Gains |
| | Losses(b) |
| | Fair Value |
| NDTF | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 110 |
| | $ | — |
| | $ | — |
| | $ | 50 |
| Equity securities | 596 |
| | 25 |
| | 1,178 |
| | 612 |
| | 10 |
| | 1,171 |
| Corporate debt securities | 3 |
| | 2 |
| | 96 |
| | 5 |
| | — |
| | 97 |
| Municipal bonds | 4 |
| | 1 |
| | 150 |
| | 4 |
| | — |
| | 120 |
| U.S. government bonds | 6 |
| | 2 |
| | 486 |
| | 9 |
| | 1 |
| | 265 |
| Other debt securities | — |
| | — |
| | 18 |
| | — |
| | — |
| | 8 |
| Total NDTF(c) | $ | 609 |
| | $ | 30 |
| | $ | 2,038 |
| | $ | 630 |
| | $ | 11 |
| | $ | 1,711 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 1 |
| | $ | — |
| | $ | — |
| | $ | — |
| Total Other Investments(a) | $ | — |
| | $ | — |
| | $ | 1 |
| | $ | — |
| | $ | — |
| | $ | — |
| Total Investments | $ | 609 |
| | $ | 30 |
| | $ | 2,039 |
| | $ | 630 |
| | $ | 11 |
| | $ | 1,711 |
|
(a) These amounts are recorded in Other with Investments and Other Assets on the Consolidated Balance Sheets. | | (b) | Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset. |
| | (c) | As of December 31, 2015, the estimated fair value of the NDTF includes NDTF assets acquired with the purchase of NCEMPA's ownership interest in certain generating assets. Refer to Note 2 for further information. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2015 |
| Due in one year or less | $ | 15 |
| Due after one through five years | 285 |
| Due after five through 10 years | 206 |
| Due after 10 years | 244 |
| Total | $ | 750 |
|
|
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) | 2015 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 26 |
| | $ | 19 |
| | $ | 58 |
| Realized losses | 11 |
| | 5 |
| | 26 |
|
|
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, 2015 | | December 31, 2014 | | Gross |
| | Gross |
| | | | Gross |
| | Gross |
| | | | Unrealized |
| | Unrealized |
| | | | Unrealized |
| | Unrealized |
| | | | Holding |
| | Holding |
| | Estimated |
| | Holding |
| | Holding |
| | Estimated |
| (in millions) | Gains |
| | Losses(b) |
| | Fair Value |
| | Gains |
| | Losses(b) |
| | Fair Value |
| NDTF | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 35 |
| | $ | — |
| | $ | — |
| | $ | 35 |
| Equity securities | 206 |
| | 6 |
| | 318 |
| | 212 |
| | 2 |
| | 317 |
| Corporate debt securities | 1 |
| | 1 |
| | 44 |
| | 1 |
| | — |
| | 41 |
| Municipal bonds | — |
| | — |
| | 2 |
| | — |
| | — |
| | 2 |
| U.S. government bonds | 2 |
| | — |
| | 330 |
| | 3 |
| | — |
| | 405 |
| Other debt securities | — |
| | — |
| | 12 |
| | — |
| | — |
| | 6 |
| Total NDTF(c) | $ | 209 |
| | $ | 7 |
| | $ | 741 |
| | $ | 216 |
| | $ | 2 |
| | $ | 806 |
| Other Investments | |
| | |
| | |
| | |
| | |
| | |
| Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 6 |
| | $ | — |
| | $ | — |
| | $ | 1 |
| Municipal bonds | 3 |
| | — |
| | 45 |
| | 3 |
| | — |
| | 43 |
| Total Other Investments(a) | $ | 3 |
| | $ | — |
| | $ | 51 |
| | $ | 3 |
| | $ | — |
| | $ | 44 |
| Total Investments | $ | 212 |
| | $ | 7 |
| | $ | 792 |
| | $ | 219 |
| | $ | 2 |
| | $ | 850 |
|
(a) These amounts are recorded in Other with Investments and Other Assets on the Consolidated Balance Sheets. | | (b) | Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset. |
| | (c) | The decrease in estimated fair value of the NDTF as of December 31, 2015, is primarily due to reimbursements from the NDTF for costs related to ongoing decommissioning activity of the Crystal River Unit 3 Nuclear Plant, partially offset by the NDTF asset acquired in a settlement with FMJO. Refer to Note 2 for further information. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2015 |
| Due in one year or less | $ | 79 |
| Due after one through five years | 211 |
| Due after five through 10 years | 48 |
| Due after 10 years | 95 |
| Total | $ | 433 |
|
|
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) | 2015 |
| | 2014 |
| | 2013 |
| Realized gains | $ | 7 |
| | $ | 138 |
| | $ | 32 |
| Realized losses | 2 |
| | 5 |
| | 20 |
|
|
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, 2015 | | December 31, 2014 | | Gross |
| | Gross |
| | | | Gross |
| | Gross |
| | | | Unrealized |
| | Unrealized |
| | | | Unrealized |
| | Unrealized |
| | | | Holding |
| | Holding |
| | Estimated |
| | Holding |
| | Holding |
| | Estimated |
| (in millions) | Gains |
| | Losses(b) |
| | Fair Value |
| | Gains |
| | Losses(b) |
| | Fair Value |
| Other Investments | | | | | | | | | | | | Cash and cash equivalents | $ | — |
| | $ | — |
| | $ | 2 |
| | $ | — |
| | $ | — |
| | $ | — |
| Equity securities | 27 |
| | — |
| | 71 |
| | 28 |
| | — |
| | 71 |
| Corporate debt securities | — |
| | — |
| | 2 |
| | — |
| | — |
| | — |
| Municipal bonds | — |
| | 1 |
| | 26 |
| | — |
| | 1 |
| | 30 |
| Total Other Investments(a) | $ | 27 |
| | $ | 1 |
| | $ | 101 |
| | $ | 28 |
| | $ | 1 |
| | $ | 101 |
| Total Investments | $ | 27 |
| | $ | 1 |
| | $ | 101 |
| | $ | 28 |
| | $ | 1 |
| | $ | 101 |
|
(a) These amounts are recorded in Other within Investments and Other Assets on the Consolidated Balance Sheets. | | (b) | Substantially all these amounts represent other-than-temporary impairments on investments within Investment Trusts that have been recognized immediately as a regulatory asset. |
|
Schedule of Maturity Dates for Debt Securities |
The table below summarizes the maturity date for debt securities. | | | | | (in millions) | December 31, 2015 |
| Due in one year or less | $ | 2 |
| Due after one through five years | 14 |
| Due after five through 10 years | 9 |
| Due after 10 years | 3 |
| Total | $ | 28 |
|
|