Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,994	$ 7,842	$ 21,848	$ 21,417
Segment income (loss)	1,403	1,360	3,027	3,032
Less: Noncontrolling interests	(69)	9	(42)	73
Add: Preferred stock dividend	39	39	92	92
Discontinued operations	(190)	23	(1,283)	62
Net Income	1,321	1,413	1,878	3,113
Segment assets	181,160		181,160		$ 178,086
Impairment of assets and other charges	88	(4)	96	202
Operation, maintenance and other	1,428	1,308	4,113	4,223
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	577	628	1,875	1,811
Segment income (loss)	80	103	251	236
Segment assets	11,794		11,794		$ 11,506
Impairment of assets and other charges		(11)		(11)
Operation, maintenance and other	114	121	358	408
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,986	7,835	21,824	21,395
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,695	7,431	20,308	19,552
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	291	404	1,516	1,843
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	8,028	7,866	21,946	21,488
Segment income (loss)	1,462	1,544	3,415	3,514
Segment assets	172,312		172,312
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	577	628	1,875	1,811
Segment income (loss)	82	104	255	239
Segment assets	11,963		11,963
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,715	7,439	20,363	19,576
Segment income (loss)	1,447	1,540	3,088	3,237
Segment assets	155,588		155,588
Impairment of assets and other charges	95		95	211
Operation, maintenance and other	16		16	46
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Supreme Court Ruling
Segment Reporting Information [Line Items]
Less: Noncontrolling interests				(20)
Operating Segments | Electric Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	472	507	1,411	1,320
Segment income (loss)	65	74	168	152
Segment assets	7,745		7,745
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	313	427	1,583	1,912
Segment income (loss)	15	4	327	277
Segment assets	16,724		16,724
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	105	121	464	491
Segment income (loss)	17	30	87	87
Segment assets	4,218		4,218
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)	(2)	(1)	(4)	(3)
Segment assets	10		10
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	33	30	98	91
Segment income (loss)	(59)	(183)	(388)	(480)
Segment assets	8,848		8,848
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(67)	(54)	(196)	(162)
Segment income (loss)		(1)		(2)
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	(179)		(179)
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	42	31	122	93
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	20	8	55	24
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	22	23	67	69
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	25	23	74	69
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 8	$ 7	$ 24	$ 22