Business Segments (Business Segment Data) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting Information [Line Items]
Operating Revenues	$ 7,968	$ 6,951	$ 21,785	$ 18,859
Segment income (loss)	1,360	1,366	3,071	3,070
Less: Noncontrolling interests	9	129	73	247
Add: Preferred stock dividend	39	39	92	92
Net Income	1,413	1,276	3,113	2,915
Segment assets	176,340		176,340		$ 169,587
Impairment of assets and other charges	(4)	211	202	342
Other income and expenses, net	89	238	293	493
Operation, maintenance and other	1,394	1,507	4,471	4,319
Regulated natural gas	7,374	6,495	19,381	16,972
Interest Expense	621	581	1,815	1,688
Equity in earnings of unconsolidated affiliates	26	22	87	14
Unregulated operating revenue	(197)	(193)	(580)	(573)
Depreciation and amortization	1,364	1,265	3,986	3,698
Duke Energy Carolinas
Segment Reporting Information [Line Items]
Operating Revenues	2,175	2,104	5,844	5,430
Segment assets	49,133		49,133		47,162
Impairment of assets and other charges	6	163	(3)	238
Operation, maintenance and other	436	471	1,410	1,347
Interest Expense	131	137	415	400
Depreciation and amortization	375	366	1,138	1,088
Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	628	506	1,811	1,494
Segment income (loss)	103	58	236	188
Segment assets	11,315		11,315		10,774
Impairment of assets and other charges	(11)		(11)	5
Operation, maintenance and other	121	116	408	335
Regulated natural gas	507	413	1,320	1,119
Interest Expense	32	29	92	82
Depreciation and amortization	84	79	247	228
Duke Energy Progress
Segment Reporting Information [Line Items]
Operating Revenues	1,969	1,667	5,182	4,417
Segment assets	36,193		36,193		$ 35,383
Impairment of assets and other charges		42	4	60
Operation, maintenance and other	350	368	1,101	1,092
Interest Expense	85	79	260	226
Depreciation and amortization	313	290	890	811
Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,431	6,560	19,552	17,161
Impairment of assets and other charges			211
Other income and expenses, net			(46)
Electric Utilities and Infrastructure | Duke Energy Carolinas
Segment Reporting Information [Line Items]
Impairment of assets and other charges		160		160
Other income and expenses, net		(77)		(77)
Operation, maintenance and other		5		5
Regulated natural gas		(13)		13
Interest Expense		(3)		(3)
Electric Utilities and Infrastructure | Duke Energy Progress
Segment Reporting Information [Line Items]
Impairment of assets and other charges		42		42
Other income and expenses, net		(34)		(34)
Operation, maintenance and other		7		7
Regulated natural gas		15		15
Interest Expense		(5)		(5)
Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	404	266	1,843	1,323
Equity in earnings of unconsolidated affiliates				19
Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	127	117	369	355
Commercial Renewables | Texas Storm Uri
Segment Reporting Information [Line Items]
Less: Noncontrolling interests				12
Net Income				(35)
Operation, maintenance and other				2
Equity in earnings of unconsolidated affiliates				(29)
Unregulated operating revenue				8
Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,962	6,943	21,764	18,839
Other
Segment Reporting Information [Line Items]
Impairment of assets and other charges		8		139
Operation, maintenance and other		1		28
Depreciation and amortization				17
Operating Segments | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	7,439	6,569	19,576	17,185
Segment income (loss)	1,540	1,425	3,237	3,180
Segment assets	149,518		149,518
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	507	413	1,320	1,119
Segment income (loss)	74	48	152	122
Segment assets	7,400		7,400
Operating Segments | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	427	289	1,912	1,391
Segment income (loss)	4	(3)	277	259
Segment assets	15,800		15,800
Operating Segments | Gas Utilities and Infrastructure | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	121	93	491	375
Segment income (loss)	30	11	87	77
Segment assets	4,023		4,023
Operating Segments | Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	130	117	372	355
Segment income (loss)	2	78	43	152
Segment assets	7,507		7,507
Operating Segments | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	7,996	6,975	21,860	18,931
Segment income (loss)	1,546	1,500	3,557	3,591
Segment assets	172,825		172,825
Operating Segments | Total Reportable Segments | Duke Energy Ohio
Segment Reporting Information [Line Items]
Operating Revenues	628	506	1,811	1,494
Segment income (loss)	104	59	239	199
Segment assets	11,423		11,423
Operating Segments | Nonregulated Segment
Segment Reporting Information [Line Items]
Segment income (loss)			15
Gain on derivative instruments	6
Other
Segment Reporting Information [Line Items]
Segment assets	3,519		3,519
Other | Other | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment income (loss)	(1)	(1)	(3)	(11)
Segment assets	14		14
Corporate And Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	29	28	89	81
Segment income (loss)	(186)	(134)	(486)	(521)
Eliminations
Segment Reporting Information [Line Items]
Operating Revenues	(57)	(52)	(164)	(153)
Segment assets	(4)		(4)
Eliminations | Duke Energy Ohio
Segment Reporting Information [Line Items]
Segment assets	(122)		(122)
Eliminations | Electric Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	8	9	24	24
Eliminations | Gas Utilities and Infrastructure
Segment Reporting Information [Line Items]
Operating Revenues	23	23	69	68
Eliminations | Commercial Renewables
Segment Reporting Information [Line Items]
Operating Revenues	3		3
Eliminations | Total Reportable Segments
Segment Reporting Information [Line Items]
Operating Revenues	34	32	96	92
Eliminations | Other
Segment Reporting Information [Line Items]
Operating Revenues	23	20	68	61
Other
Segment Reporting Information [Line Items]
Operating Revenues	$ 6	$ 8	$ 21	$ 20