Employee Benefit Plans (Expected Benefit Payments) (Details) $ in Millions	Dec. 31, 2023 USD ($)
Pension Plan
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	$ 634
2025	624
2026	601
2027	582
2028	565
2029-2033	2,481
Pension Plan \| Duke Energy Carolinas
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	176
2025	171
2026	162
2027	153
2028	146
2029-2033	590
Pension Plan \| Progress Energy
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	180
2025	182
2026	177
2027	175
2028	171
2029-2033	779
Pension Plan \| Duke Energy Progress
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	95
2025	97
2026	89
2027	87
2028	84
2029-2033	355
Pension Plan \| Duke Energy Florida
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	84
2025	84
2026	86
2027	86
2028	86
2029-2033	420
Pension Plan \| Duke Energy Ohio
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	31
2025	30
2026	30
2027	29
2028	29
2029-2033	131
Pension Plan \| Duke Energy Indiana
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	45
2025	44
2026	43
2027	42
2028	42
2029-2033	200
Pension Plan \| Piedmont
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	18
2025	16
2026	16
2027	15
2028	15
2029-2033	73
Other Post-Retirement Benefit Plans
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	57
2025	47
2026	42
2027	37
2028	34
2029-2033	124
Other Post-Retirement Benefit Plans \| Duke Energy Carolinas
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	14
2025	11
2026	10
2027	8
2028	7
2029-2033	23
Other Post-Retirement Benefit Plans \| Progress Energy
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	18
2025	17
2026	15
2027	14
2028	13
2029-2033	55
Other Post-Retirement Benefit Plans \| Duke Energy Progress
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	11
2025	10
2026	9
2027	8
2028	8
2029-2033	32
Other Post-Retirement Benefit Plans \| Duke Energy Florida
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	8
2025	7
2026	6
2027	6
2028	5
2029-2033	23
Other Post-Retirement Benefit Plans \| Duke Energy Ohio
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	3
2025	3
2026	3
2027	2
2028	2
2029-2033	7
Other Post-Retirement Benefit Plans \| Duke Energy Indiana
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	4
2025	3
2026	3
2027	3
2028	2
2029-2033	8
Other Post-Retirement Benefit Plans \| Piedmont
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]
2024	2
2025	2
2026	2
2027	2
2028	2
2029-2033	$ 7

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Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-1

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Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.

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Amount of benefit for defined benefit plan expected to be paid in second fiscal year following current fiscal year.

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