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Debt and Credit Facilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Debt Disclosure [Abstract] |
Schedule of Debt | The following tables summarize outstanding debt.
| December 31, 2019
| Weighted |  |  |  |  |  |  |  |  |  |
| Average |  |  |  | Duke |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Interest |  |  | Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Rate |  |  | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont |
Unsecured debt, maturing 2020-2078 | 4.02 | % |  | $ | 22,477 |  | $ | 1,150 |  | $ | 3,650 |  | $ | 700 |  | $ | 350 |  | $ | 1,110 |  | $ | 405 |  | $ | 2,399 |
Secured debt, maturing 2020-2052 | 3.30 | % |  | 4,537 |  | 544 |  | 1,722 |  | 335 |  | 1,387 |  | — |  | — |  | — |
First mortgage bonds, maturing 2020-2049(a) | 4.13 | % |  | 27,977 |  | 9,557 |  | 13,800 |  | 7,575 |  | 6,225 |  | 1,449 |  | 3,169 |  | — |
Finance leases, maturing 2022-2051(b) | 6.60 | % |  | 969 |  | 179 |  | 405 |  | 307 |  | 98 |  | — |  | 10 |  | — |
Tax-exempt bonds, maturing 2022-2041(c) | 2.90 | % |  | 730 |  | 243 |  | 48 |  | 48 |  | — |  | 77 |  | 362 |  | — |
Notes payable and commercial paper(d) | 1.98 | % |  | 3,588 |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Money pool/intercompany borrowings |  |  | — |  | 329 |  | 1,970 |  | 216 |  | — |  | 337 |  | 180 |  | 476 |
Fair value hedge carrying value adjustment |  |  | 5 |  | 5 |  | — |  | — |  | — |  | — |  | — |  | — |
Unamortized debt discount and premium, net(e) |  |  | 1,294 |  | (23 | ) | (29 | ) | (17 | ) | (11 | ) | (30 | ) | (19 | ) | (2 | )
Unamortized debt issuance costs(f) |  |  | (316 | ) | (55 | ) | (111 | ) | (40 | ) | (62 | ) | (12 | ) | (20 | ) | (13 | )
Total debt | 3.92 | % |  | $ | 61,261 |  | $ | 11,929 |  | $ | 21,455 |  | $ | 9,124 |  | $ | 7,987 |  | $ | 2,931 |  | $ | 4,087 |  | $ | 2,860 |
Short-term notes payable and commercial paper |  |  | (3,135 | ) | — |  | — |  | — |  | — |  | — |  | — |  | — |
Short-term money pool/intercompany borrowings |  |  | — |  | (29 | ) | (1,821 | ) | (66 | ) | — |  | (312 | ) | (30 | ) | (476 | )
Current maturities of long-term debt(g) |  |  | (3,141 | ) | (458 | ) | (1,577 | ) | (1,006 | ) | (571 | ) | — |  | (503 | ) | — |
Total long-term debt(g) |  |  | $ | 54,985 |  | $ | 11,442 |  | $ | 18,057 |  | $ | 8,052 |  | $ | 7,416 |  | $ | 2,619 |  | $ | 3,554 |  | $ | 2,384 |
(a) | Substantially all electric utility property is mortgaged under mortgage bond indentures.
(b) | Duke Energy includes $44 million and $419 million of finance lease purchase accounting adjustments related to Duke Energy Progress and Duke Energy Florida, respectively, related to PPAs that are not accounted for as finance leases in their respective financial statements because of grandfathering provisions in GAAP.
(c) | Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility.
(d) | Includes $625 million classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper program was 14 days.
(e) | Duke Energy includes $1,275 million and $137 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively.
(f) | Duke Energy includes $37 million in purchase accounting adjustments primarily related to the merger with Progress Energy.
(g) | Refer to Note 18 for additional information on amounts from consolidated VIEs.
| December 31, 2018
| Weighted |  |  |  |  |  |  |  |  |  |
| Average |  |  |  | Duke |  |  | Duke |  | Duke |  | Duke |  | Duke |  |
| Interest |  |  | Duke |  | Energy |  | Progress |  | Energy |  | Energy |  | Energy |  | Energy |  |
(in millions) | Rate |  |  | Energy |  | Carolinas |  | Energy |  | Progress |  | Florida |  | Ohio |  | Indiana |  | Piedmont |
Unsecured debt, maturing 2019-2078 | 4.26 | % |  | $ | 20,955 |  | $ | 1,150 |  | $ | 3,800 |  | $ | 50 |  | $ | 350 |  | $ | 1,000 |  | $ | 408 |  | $ | 2,150 |
Secured debt, maturing 2020-2037 | 3.69 | % |  | 4,297 |  | 450 |  | 1,703 |  | 300 |  | 1,403 |  | — |  | — |  | — |
First mortgage bonds, maturing 2019-2048(a) | 4.32 | % |  | 25,628 |  | 8,759 |  | 13,100 |  | 7,574 |  | 5,526 |  | 1,099 |  | 2,670 |  | — |
Finance leases, maturing 2019-2051(b) | 5.06 | % |  | 941 |  | 109 |  | 251 |  | 137 |  | 114 |  | 2 |  | 10 |  | — |
Tax-exempt bonds, maturing 2019-2041(c) | 3.40 | % |  | 941 |  | 243 |  | 48 |  | 48 |  | — |  | 77 |  | 572 |  | — |
Notes payable and commercial paper(d) | 2.73 | % |  | 4,035 |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Money pool/intercompany borrowings |  |  | — |  | 739 |  | 1,385 |  | 444 |  | 108 |  | 299 |  | 317 |  | 198 |
Fair value hedge carrying value adjustment |  |  | 5 |  | 5 |  | — |  | — |  | — |  | — |  | — |  | — |
Unamortized debt discount and premium, net(e) |  |  | 1,434 |  | (23 | ) | (29 | ) | (15 | ) | (11 | ) | (31 | ) | (8 | ) | (1 | )
Unamortized debt issuance costs(f) |  |  | (297 | ) | (54 | ) | (112 | ) | (40 | ) | (61 | ) | (7 | ) | (20 | ) | (11 | )
Total debt | 4.13 | % |  | $ | 57,939 |  | $ | 11,378 |  | $ | 20,146 |  | $ | 8,498 |  | $ | 7,429 |  | $ | 2,439 |  | $ | 3,949 |  | $ | 2,336 |
Short-term notes payable and commercial paper |  |  | (3,410 | ) | — |  | — |  | — |  | — |  | — |  | — |  | — |
Short-term money pool/intercompany borrowings |  |  | — |  | (439 | ) | (1,235 | ) | (294 | ) | (108 | ) | (274 | ) | (167 | ) | (198 | )
Current maturities of long-term debt(g) |  |  | (3,406 | ) | (6 | ) | (1,672 | ) | (603 | ) | (270 | ) | (551 | ) | (63 | ) | (350 | )
Total long-term debt(g) |  |  | $ | 51,123 |  | $ | 10,933 |  | $ | 17,239 |  | $ | 7,601 |  | $ | 7,051 |  | $ | 1,614 |  | $ | 3,719 |  | $ | 1,788 |
(a) | Substantially all electric utility property is mortgaged under mortgage bond indentures.
(b) | Duke Energy includes $63 million and $531 million of finance lease purchase accounting adjustments related to Duke Energy Progress and Duke Energy Florida, respectively, related to PPAs that are not accounted for as finance leases in their respective financial statements because of grandfathering provisions in GAAP.
(c) | Substantially all tax-exempt bonds are secured by first mortgage bonds, letters of credit or the Master Credit Facility.
(d) | Includes $625 million that was classified as Long-Term Debt on the Consolidated Balance Sheets due to the existence of long-term credit facilities that backstop these commercial paper balances, along with Duke Energy’s ability and intent to refinance these balances on a long-term basis. The weighted average days to maturity for Duke Energy's commercial paper programs was 16 days.
(e) | Duke Energy includes $1,380 million and $156 million in purchase accounting adjustments related to Progress Energy and Piedmont, respectively.
(f) | Duke Energy includes $41 million in purchase accounting adjustments primarily related to the merger with Progress Energy.
(g) Refer to Note 18 for additional information on amounts from consolidated VIEs. The following tables show short-term obligations classified as long-term debt.
| December 31, 2019
|  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |
| Duke |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |
(in millions) | Energy |  |  | Carolinas |  |  | Progress |  |  | Ohio |  |  | Indiana |
Tax-exempt bonds | $ | 312 |  |  | $ | — |  |  | $ | — |  |  | $ | 27 |  |  | $ | 285 |
Commercial paper(a) | 625 |  |  | 300 |  |  | 150 |  |  | 25 |  |  | 150 |
Total | $ | 937 |  |  | $ | 300 |  |  | $ | 150 |  |  | $ | 52 |  |  | $ | 435 |
| December 31, 2018
|  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |
| Duke |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |
(in millions) | Energy |  |  | Carolinas |  |  | Progress |  |  | Ohio |  |  | Indiana |
Tax-exempt bonds | $ | 312 |  |  | $ | — |  |  | $ | — |  |  | $ | 27 |  |  | $ | 285 |
Commercial paper(a) | 625 |  |  | 300 |  |  | 150 |  |  | 25 |  |  | 150 |
Total | $ | 937 |  |  | $ | 300 |  |  | $ | 150 |  |  | $ | 52 |  |  | $ | 435 |
(a) Progress Energy amounts are equal to Duke Energy Progress amounts. The following table shows the significant components of Current maturities of Long-Term Debt on the Consolidated Balance Sheets. The Duke Energy Registrants currently anticipate satisfying these obligations with cash on hand and proceeds from additional borrowings.
(in millions) | Maturity Date |  | Interest Rate |  |  | December 31, 2019 |
Unsecured Debt |  |  |  |  |
Duke Energy (Parent) | June 2020 |  | 2.100 | % |  | $ | 330 |
Duke Energy Progress | December 2020 |  | 2.510 | % | (a) | 700 |
First Mortgage Bonds |  |  |  |  |
Duke Energy Florida | January 2020 |  | 1.850 | % |  | 250 |
Duke Energy Florida | April 2020 |  | 4.550 | % |  | 250 |
Duke Energy Carolinas | June 2020 |  | 4.300 | % |  | 450 |
Duke Energy Indiana | July 2020 |  | 3.750 | % |  | 500 |
Duke Energy Progress | September 2020 |  | 2.065 | % | (a) | 300 |
Other(b) |  |  |  |  | 361 |
Current maturities of long-term debt |  |  |  |  | $ | 3,141 |
(a) | Debt has a floating interest rate.
(b) Includes finance lease obligations, amortizing debt and small bullet maturities.
Schedule of Maturities of Long-term Debt | The following table shows the annual maturities of long-term debt for the next five years and thereafter. Amounts presented exclude short-term notes payable, commercial paper and money pool borrowings and debt issuance costs for the Subsidiary Registrants.
| December 31, 2019
|  |  | Duke |  |  |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  |
| Duke |  |  | Energy |  |  | Progress |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  |
(in millions) | Energy(a) |  |  | Carolinas |  |  | Energy |  |  | Progress |  |  | Florida |  |  | Ohio |  |  | Indiana |  |  | Piedmont |
2020 | $ | 3,141 |  |  | $ | 458 |  |  | $ | 1,578 |  |  | $ | 1,006 |  |  | $ | 572 |  |  | — |  |  | $ | 503 |  |  | $ | — |
2021 | 5,053 |  |  | 504 |  |  | 2,257 |  |  | 932 |  |  | 825 |  |  | 50 |  |  | 70 |  |  | 160 |
2022 | 4,334 |  |  | 830 |  |  | 1,048 |  |  | 508 |  |  | 90 |  |  | — |  |  | 94 |  |  | — |
2023 | 3,112 |  |  | 1,006 |  |  | 398 |  |  | 319 |  |  | 79 |  |  | 325 |  |  | 3 |  |  | 45 |
2024 | 1,965 |  |  | 306 |  |  | 227 |  |  | 160 |  |  | 67 |  |  | 25 |  |  | 154 |  |  | 40 |
Thereafter | 39,542 |  |  | 8,875 |  |  | 14,267 |  |  | 6,190 |  |  | 6,427 |  |  | 2,261 |  |  | 3,272 |  |  | 2,155 |
Total long-term debt, including current maturities | $ | 57,147 |  |  | $ | 11,979 |  |  | $ | 19,775 |  |  | $ | 9,115 |  |  | $ | 8,060 |  |  | $ | 2,661 |  |  | $ | 4,096 |  |  | $ | 2,400 |
(a) Excludes $1,448 million in purchase accounting adjustments related to the Progress Energy merger and the Piedmont acquisition.
Schedule of Long-term Debt Instruments | The following tables summarize significant debt issuances (in millions).
|  |  |  |  | Year Ended December 31, 2019
|  |  |  |  |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  |
| Maturity |  | Interest |  |  | Duke |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  |
Issuance Date | Date |  | Rate |  |  | Energy |  |  | (Parent) |  |  | Carolinas |  |  | Progress |  |  | Florida |  |  | Ohio |  |  | Indiana |  |  | Piedmont |
Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 2019(a) | Mar 2022 |  | 2.538 | % | (b) | $ | 300 |  |  | $ | 300 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
March 2019(a) | Mar 2022 |  | 3.227 | % |  | 300 |  |  | 300 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
May 2019(e) | Jun 2029 |  | 3.500 | % |  | 600 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 600 |
June 2019(a) | Jun 2029 |  | 3.400 | % |  | 600 |  |  | 600 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
June 2019(a) | Jun 2049 |  | 4.200 | % |  | 600 |  |  | 600 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
July 2019(g) | Jul 2049 |  | 4.320 | % |  | 40 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 40 |  |  | — |  |  | — |
September 2019(g) | Oct 2025 |  | 3.230 | % |  | 95 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 95 |  |  | — |  |  | — |
September 2019(g) | Oct 2029 |  | 3.560 | % |  | 75 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 75 |  |  | — |  |  | — |
November 2019(h) | Nov 2021 |  | 2.167 | % | (b) | 200 |  |  | — |  |  | — |  |  | — |  |  | 200 |  |  | — |  |  | — |  |  | — |
First Mortgage Bonds |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
January 2019(c) | Feb 2029 |  | 3.650 | % |  | 400 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 400 |  |  | — |  |  | — |
January 2019(c) | Feb 2049 |  | 4.300 | % |  | 400 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 400 |  |  | — |  |  | — |
March 2019(d) | Mar 2029 |  | 3.450 | % |  | 600 |  |  | — |  |  | — |  |  | 600 |  |  | — |  |  | — |  |  | — |  |  | — |
August 2019(a) | Aug 2029 |  | 2.450 | % |  | 450 |  |  | — |  |  | 450 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
August 2019(a) | Aug 2049 |  | 3.200 | % |  | 350 |  |  | — |  |  | 350 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
September 2019(f) | Oct 2049 |  | 3.250 | % |  | 500 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 500 |  |  | — |
November 2019(i) | Dec 2029 |  | 2.500 | % |  | 700 |  |  | — |  |  | — |  |  | — |  |  | 700 |  |  | — |  |  | — |  |  | — |
Total issuances |  |  |  |  | $ | 6,210 |  |  | $ | 1,800 |  |  | $ | 800 |  |  | $ | 600 |  |  | $ | 900 |  |  | $ | 1,010 |  |  | $ | 500 |  |  | $ | 600 |
(a) | Debt issued to pay down short-term debt and for general corporate purposes.
(b) | Debt issuance has a floating interest rate.
(c) | Debt issued to repay at maturity $450 million first mortgage bonds due April 2019, pay down short-term debt and for general corporate purposes.
(d) | Debt issued to fund eligible green energy projects in the Carolinas.
(e) | Debt issued to repay in full the outstanding $350 million Piedmont unsecured term loan due September 2019, pay down short-term debt and for general corporate purposes.
(f) | Debt issued to retire $150 million of pollution control bonds, pay down short-term debt and for general corporate purposes.
(g) | Debt issued to repay at maturity $100 million debentures due October 2019, pay down short-term debt and for general corporate purposes.
(h) | Debt issued to fund storm restoration costs and for general corporate purposes.
(i) | Debt issued to reimburse the payment of existing and new Eligible Green Expenditures in Florida.
In January 2020, Duke Energy Carolinas closed and funded $900 million of first mortgage bonds of which $500 million carry a fixed interest rate of 2.45% and mature February 2030 and $400 million carry a fixed interest rate of 3.20% and mature August 2049. The proceeds will be used to repay at maturity $450 million, 4.30% debentures maturing June 2020, and for general corporate purposes.
|  |  |  |  | Year Ended December 31, 2018
|  |  |  |  |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |
| Maturity |  | Interest |  |  | Duke |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |
Issuance Date | Date |  | Rate |  |  | Energy |  |  | (Parent) |  |  | Carolinas |  |  | Progress |  |  | Florida |
Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |  |
March 2018(a) | April 2025 |  | 3.950 | % |  | $ | 250 |  |  | $ | 250 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
May 2018(b) | May 2021 |  | 3.114 | % |  | 500 |  |  | 500 |  |  | — |  |  | — |  |  | — |
September 2018(c) | September 2078 |  | 5.625 | % |  | 500 |  |  | 500 |  |  | — |  |  | — |  |  | — |
First Mortgage Bonds |  |  |  |  |  |  |  |  |  |  |  |  |
March 2018(d) | March 2023 |  | 3.050 | % |  | 500 |  |  | — |  |  | 500 |  |  | — |  |  | — |
March 2018(d) | March 2048 |  | 3.950 | % |  | 500 |  |  | — |  |  | 500 |  |  | — |  |  | — |
June 2018(e) | July 2028 |  | 3.800 | % |  | 600 |  |  | — |  |  | — |  |  | — |  |  | 600 |
June 2018(e) | July 2048 |  | 4.200 | % |  | 400 |  |  | — |  |  | — |  |  | — |  |  | 400 |
August 2018(f) | September 2023 |  | 3.375 | % |  | 300 |  |  | — |  |  | — |  |  | 300 |  |  | — |
August 2018(f) | September 2028 |  | 3.700 | % |  | 500 |  |  | — |  |  | — |  |  | 500 |  |  | — |
November 2018(g) | May 2022 |  | 3.350 | % |  | 350 |  |  | — |  |  | 350 |  |  | — |  |  | — |
November 2018(g) | November 2028 |  | 3.950 | % |  | 650 |  |  | — |  |  | 650 |  |  | — |  |  | — |
Total issuances |  |  |  |  | $ | 5,050 |  |  | $ | 1,250 |  |  | $ | 2,000 |  |  | $ | 800 |  |  | $ | 1,000 |
(a) | Debt issued to pay down short-term debt.
(b) | Debt issued to pay down short-term debt. Debt issuance has a floating debt rate.
(c) | Callable after September 2023 at par. Junior subordinated hybrid debt issued to pay down short-term debt and for general corporate purposes.
(d) | Debt issued to repay at maturity a $300 million first mortgage bond due April 2018, pay down intercompany short-term debt and for general corporate purposes.
(e) | Debt issued to repay a portion of intercompany short-term debt under the money pool borrowing arrangement and for general corporate purposes.
(f) | Debt issued to repay short-term debt and for general corporate purposes.
(g) Debt issued to fund eligible green energy projects, including zero-carbon solar and energy storage, in the Carolinas.
Schedule Of Line Of Credit Facilities | The table below includes the current borrowing sublimits and available capacity under these credit facilities.
| December 31, 2019
|  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  | Duke |  |  |
| Duke |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  | Energy |  |  |
(in millions) | Energy |  |  | (Parent) |  |  | Carolinas |  |  | Progress |  |  | Florida |  |  | Ohio |  |  | Indiana |  |  | Piedmont |
Facility size(a) | $ | 8,000 |  |  | $ | 2,650 |  |  | $ | 1,500 |  |  | $ | 1,250 |  |  | $ | 800 |  |  | $ | 600 |  |  | $ | 600 |  |  | $ | 600 |
Reduction to backstop issuances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper(b) | (2,537 | ) |  | (1,119 | ) |  | (325 | ) |  | (207 | ) |  | — |  |  | (296 | ) |  | (176 | ) |  | (414 | )
Outstanding letters of credit | (50 | ) |  | (42 | ) |  | (4 | ) |  | (2 | ) |  | — |  |  | — |  |  | — |  |  | (2 | )
Tax-exempt bonds | (81 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (81 | ) |  | — |
Coal ash set-aside | (500 | ) |  | — |  |  | (250 | ) |  | (250 | ) |  | — |  |  | — |  |  | — |  |  | — |
Available capacity | $ | 4,832 |  |  | $ | 1,489 |  |  | $ | 921 |  |  | $ | 791 |  |  | $ | 800 |  |  | $ | 304 |  |  | $ | 343 |  |  | $ | 184 |
(a) | Represents the sublimit of each borrower.
(b) | Duke Energy issued $625 million of commercial paper and loaned the proceeds through the money pool to Duke Energy Carolinas, Duke Energy Progress, Duke Energy Ohio and Duke Energy Indiana. The balances are classified as Long-Term Debt Payable to Affiliated Companies in the Consolidated Balance Sheets.

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