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Commitments and Contingencies (Gas Supply Contracts) (Details) - Natural Gas Supply and Capacity Contracts $ in Millions | Dec. 31, 2023 USD ($)
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Duke Energy Ohio |
Long-term Purchase Commitment [Line Items] |
2024 | $ 103
2025 | 87
2026 | 57
2027 | 53
2028 | 51
Thereafter | 574
Total | 925
Piedmont |
Long-term Purchase Commitment [Line Items] |
2024 | 295
2025 | 287
2026 | 268
2027 | 209
2028 | 186
Thereafter | 373
Total | $ 1,618

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- Definition Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid in fifth 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 -Topic 440 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482648/440-10-50-4 + Details
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