Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,276	$ 7,011
Segment income (loss)	910	806
Less: Noncontrolling interests	43	37
Add: Preferred stock dividend	39	39
Discontinued operations	(145)	12
Net Income	761	820
Segment assets	178,833		$ 178,086
Impairment of assets and other charges	8	215
Regulated electric	6,324	5,933
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	709	638
Segment income (loss)	100	77
Segment assets	11,693		$ 11,506
Regulated electric	474	412
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,381	5,995
Less: Noncontrolling interests		(22)
Impairment of assets and other charges		211
Regulated electric		(46)
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	888	1,009
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,269	7,004
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	6,398	6,002
Segment income (loss)	791	723
Segment assets	152,989
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	474	412
Segment income (loss)	49	41
Segment assets	7,553
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	911	1,032
Segment income (loss)	287	254
Segment assets	16,217
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	235	226
Segment income (loss)	52	38
Segment assets	4,041
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,309	7,034
Segment income (loss)	1,078	977
Segment assets	169,206
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	709	638
Segment income (loss)	101	79
Segment assets	11,594
Other
Segment Reporting Information [Line Items]
Segment assets	9,627
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)	(1)	(2)
Segment assets	10
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	31	30
Segment income (loss)	(168)	(171)
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(64)	(53)
Segment assets	0
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	89
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	17	7
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	23
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	40	30
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	24	23
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 7	$ 7