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Goodwill (Details) - USD ($)	3 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Goodwill [Line Items]
Goodwill	$ 19,010,000,000	$ 19,010,000,000
Accumulated impairment charges	0	0
Goodwill impairment charges	0
Discontinued Operations, Held-for-sale
Goodwill [Line Items]
Assets held for sale, goodwill	294,000,000	294,000,000
Discontinued Operations, Held-for-sale | Piedmont Tennessee Disposal Group
Goodwill [Line Items]
Assets held for sale, goodwill	294,000,000	294,000,000
Piedmont
Goodwill [Line Items]
Goodwill	39,000,000	39,000,000
Piedmont | Discontinued Operations, Held-for-sale | Piedmont Tennessee Disposal Group
Goodwill [Line Items]
Assets held for sale, goodwill	10,000,000	10,000,000
Duke Energy Ohio
Goodwill [Line Items]
Goodwill	920,000,000	920,000,000
Accumulated impairment charges	216,000,000	216,000,000
Progress Energy
Goodwill [Line Items]
Goodwill	3,655,000,000	3,655,000,000
Electric Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	17,400,000,000	17,400,000,000
Electric Utilities and Infrastructure | Duke Energy Ohio
Goodwill [Line Items]
Goodwill	596,000,000	596,000,000
Electric Utilities and Infrastructure | Progress Energy
Goodwill [Line Items]
Accumulated impairment charges	0	0
Gas Utilities and Infrastructure
Goodwill [Line Items]
Goodwill	1,600,000,000	1,600,000,000
Gas Utilities and Infrastructure | Piedmont
Goodwill [Line Items]
Accumulated impairment charges	0	0
Gas Utilities and Infrastructure | Duke Energy Ohio
Goodwill [Line Items]
Goodwill	$ 324,000,000	$ 324,000,000

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