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Commitments and Contingencies (Gas Supply Contracts) (Details) - Natural Gas Supply and Capacity Contracts $ in Millions | Dec. 31, 2025 USD ($)
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Duke Energy Ohio |
Long-term Purchase Commitment [Line Items] |
2026 | $ 133
2027 | 136
2028 | 135
2029 | 131
2030 | 118
Thereafter | 828
Total | 1,481
Piedmont |
Long-term Purchase Commitment [Line Items] |
2026 | 414
2027 | 400
2028 | 335
2029 | 265
2030 | 262
Thereafter | 605
Total | $ 2,281

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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). Includes, but is not limited to, lease not yet commenced. + 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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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