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(PurchPower) (Details) - Public Utilities Purchased Power [Member] $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Duke Energy Progress [Member] |
Unconditional Purchase Obligations [Abstract] |
2019 | $ 51
2020 | 52
2021 | 53
2022 | 30
2023 | 25
Thereafter | 215
Total | $ 426
Duke Energy Progress [Member] | Minimum [Member] |
Unconditional Purchase Obligations [Abstract] |
Long-term Contract for Purchase of Electric Power, Date of Contract Expiration | 2022
Duke Energy Progress [Member] | Maximum [Member] |
Unconditional Purchase Obligations [Abstract] |
Long-term Contract for Purchase of Electric Power, Date of Contract Expiration | 2031
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased | 100.00%
Duke Energy Florida [Member] |
Unconditional Purchase Obligations [Abstract] |
2019 | $ 363
2020 | 380
2021 | 365
2022 | 363
2023 | 382
Thereafter | 361
Total | $ 2,214
Duke Energy Florida [Member] | Minimum [Member] |
Unconditional Purchase Obligations [Abstract] |
Long-term Contract for Purchase of Electric Power, Date of Contract Expiration | 2021
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased | 81.00%
Duke Energy Florida [Member] | Maximum [Member] |
Unconditional Purchase Obligations [Abstract] |
Long-term Contract for Purchase of Electric Power, Date of Contract Expiration | 2025
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased | 100.00%
Duke Energy Ohio [Member] |
Unconditional Purchase Obligations [Abstract] |
2019 | $ 146
2020 | 117
2021 | 53
2022 | 11
Total | $ 327
Duke Energy Ohio [Member] | Minimum [Member] |
Unconditional Purchase Obligations [Abstract] |
Long-term Contract for Purchase of Electric Power, Date of Contract Expiration | 2020
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased | 1.00%
Duke Energy Ohio [Member] | Maximum [Member] |
Unconditional Purchase Obligations [Abstract] |
Long-term Contract for Purchase of Electric Power, Date of Contract Expiration | 2022
Long-term Contract for Purchase of Electric Power, Share of Plant Output Being Purchased | 8.00%

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- Definition Share of plant output being purchased under a long-term contract to purchase electricity from a production plant constructed and financed by a public utility district, cooperative, or other organization. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 10.D) -URI http://asc.fasb.org/extlink&oid=6499423&loc=d3e659339-123030 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
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- Definition Amount of the fixed and determinable portion of the unrecorded unconditional purchase obligation maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77896938&loc=d3e25336-109308 + Details
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