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Debt and Credit Facilities (Tables) | 9 Months Ended
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Sep. 30, 2018
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | The following table shows the significant components of Current Maturities of Long-Term Debt on the Condensed 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 |  |  | September 30, 2018 |
Unsecured Debt |  |  |  |  |
Progress Energy | March 2019 |  | 7.050 | % |  | $ | 450 |
Duke Energy (Parent) | September 2019 |  | 5.050 | % |  | 500 |
Piedmont | September 2019 |  | 2.848 | % | (b) | 350 |
First Mortgage Bonds |  |  |  |  |
Duke Energy Carolinas | November 2018 |  | 7.000 | % |  | 500 |
Duke Energy Progress | January 2019 |  | 5.300 | % |  | 600 |
Duke Energy Ohio | April 2019 |  | 5.450 | % |  | 450 |
Other(a) |  |  |  |  | 605 |
Current maturities of long-term debt |  |  |  |  | $ | 3,455 |
(a) Includes capital lease obligations, amortizing debt and small bullet maturities. (b) Debt issuance has a floating interest rate. The following table summarizes significant debt issuances (in millions).
|  |  |  | Nine Months Ended September 30, 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 | 2.819 | % |  | 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 |  |  | — |
Total issuances |  |  |  | $ | 4,050 |  |  | $ | 1,250 |  |  | $ | 1,000 |  |  | $ | 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 interest rate.
(c) | Callable after September 2023 at par. 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 money-pool borrowing arrangement and for general corporate purposes.
(f) | Debt issued to repay short-term debt and for general corporate purposes.
Schedule Of Line Of Credit Facilities | The table below includes the current borrowing sublimits and available capacity under the Master Credit Facility.
| September 30, 2018
|  |  |  | 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 |  |  | $ | 1,750 |  |  | $ | 1,400 |  |  | $ | 650 |  |  | $ | 450 |  |  | $ | 600 |  |  | $ | 500 |
Reduction to backstop issuances |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper(b) | (2,519 | ) |  | (988 | ) |  | (872 | ) |  | (150 | ) |  | — |  |  | (216 | ) |  | (293 | ) |  | — |
Outstanding letters of credit | (55 | ) |  | (47 | ) |  | (4 | ) |  | (2 | ) |  | — |  |  | — |  |  | — |  |  | (2 | )
Tax-exempt bonds | (81 | ) |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (81 | ) |  | — |
Coal ash set-aside | (500 | ) |  | — |  |  | (250 | ) |  | (250 | ) |  | — |  |  | — |  |  | — |  |  | — |
Available capacity under the Master Credit Facility | $ | 4,845 |  |  | $ | 1,615 |  |  | $ | 624 |  |  | $ | 998 |  |  | $ | 650 |  |  | $ | 234 |  |  | $ | 226 |  |  | $ | 498 |
(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 on the Condensed Consolidated Balance Sheets.

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
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- Definition Tabular disclosure of short-term or long-term contractual arrangements with lenders, including letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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