Commitments and Contingencies (Purchased Power) (Details) - Purchased Power Contracts $ in Millions	12 Months Ended
Dec. 31, 2025 USD ($)
Duke Energy Progress
Unconditional Purchase Obligations [Abstract]
2026	$ 18
2027	18
2028	18
2029	2
2030	3
Thereafter	29
Total	$ 88
Duke Energy Progress \| Minimum
Unconditional Purchase Obligations [Abstract]
Net plant output (as a percent)	18.00%
Duke Energy Progress \| Maximum
Unconditional Purchase Obligations [Abstract]
Net plant output (as a percent)	100.00%
Duke Energy Ohio
Unconditional Purchase Obligations [Abstract]
2026	$ 191
2027	125
Total	316
Duke Energy Indiana
Unconditional Purchase Obligations [Abstract]
2026	73
2027	7
Total	$ 80

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.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
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-Section 50
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Amount of unrecorded obligation to transfer funds in future for fixed or minimum amount or quantity of product and service at fixed or minimum price. Includes, but is not limited to, lease not yet commenced and take-or-pay and throughput contracts.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 440
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-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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