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Commitments and Contingencies (Gas Supply Contracts) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Natural Gas Supply and Capacity Contracts |
Long-term Purchase Commitment [Line Items] |
2021 | $ 311
2022 | 270
2023 | 197
2024 | 139
2025 | 125
Thereafter | 662
Total | $ 1,704
Maximum | Pipeline and storage capacity contracts |
Long-term Purchase Commitment [Line Items] |
Long-term purchase commitment term | 15 years
Maximum | Natural gas supply contracts fixed payment |
Long-term Purchase Commitment [Line Items] |
Long-term purchase commitment term | 6 years
Maximum | Natural gas supply purchase commitments |
Long-term Purchase Commitment [Line Items] |
Long-term purchase commitment term | 11 years
Duke Energy Ohio | Natural Gas Supply and Capacity Contracts |
Long-term Purchase Commitment [Line Items] |
2021 | $ 41
2022 | 28
2023 | 20
2024 | 17
2025 | 14
Thereafter | 60
Total | 180
Piedmont | Natural Gas Supply and Capacity Contracts |
Long-term Purchase Commitment [Line Items] |
2021 | 270
2022 | 242
2023 | 177
2024 | 122
2025 | 111
Thereafter | 602
Total | $ 1,524

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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308 + Details
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