Commitments and Contingencies (Purchased Power) (Details) - Purchased Power Contracts $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Duke Energy Progress
Unconditional Purchase Obligations [Abstract]
2023	$ 22
2024	21
2025	22
2026	18
2027	19
Thereafter	27
Total	$ 129
Duke Energy Progress \| Minimum
Unconditional Purchase Obligations [Abstract]
Net plant output percent	18.00%
Duke Energy Progress \| Maximum
Unconditional Purchase Obligations [Abstract]
Net plant output percent	100.00%
Duke Energy Florida
Unconditional Purchase Obligations [Abstract]
2023	$ 300
2024	267
2025	91
Total	$ 658
Net plant output percent	100.00%
Duke Energy Ohio
Unconditional Purchase Obligations [Abstract]
2023	$ 55
2024	36
Total	$ 91

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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-SubTopic 10
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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
-Section 50
-Paragraph 4
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Amount of fixed and determinable portion of unrecorded unconditional purchase obligation to be paid after 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 440
-SubTopic 10
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