Property, Plant and Equipment (Schedule Of Property, Plant and Equipment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	13 years	15 years
Land	$ 2,162	$ 2,046
Other buildings and improvements	5,289	5,090
Equipment	2,659	2,608
Construction in process	6,168	6,645
Total property, plant and equipment	161,819	155,580
Facilities to be retired, net	144	29
Total net property, plant and equipment	$ 111,408	$ 106,782
Other, estimated useful life, in years	14 years	14 years
Finance leases, gross	$ 958	$ 832
Accumulated amortization of finance leases	9	12
Capitalized Interest Costs [Abstract]
Capitalized interest	72	112	$ 159
Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	3,181	3,284
Accumulated depreciation and amortization	(1,799)	(1,832)
Consolidated VIEs
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Total property, plant and equipment	7,339	6,394
Accumulated depreciation and amortization	(1,474)	(1,242)
Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	$ (47,611)	$ (46,216)
Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	40 years	39 years
Plant - transmission and distribution	$ 120,855	$ 117,107
Regulated | Natural gas transmission and distribution
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	54 years	54 years
Plant - transmission and distribution	$ 12,079	$ 10,799
Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	37 years	36 years
Other buildings and improvements	$ 1,921	$ 2,038
Nonregulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(2,944)	(2,611)
Accumulated amortization of finance leases	$ (1)	$ 23
Nonregulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	28 years	27 years
Plant - transmission and distribution	$ 7,104	$ 5,444
Nonregulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Equipment, estimated useful life, years	11 years	10 years
Other buildings and improvements	$ 401	$ 519
Duke Energy Carolinas
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	543	536
Other buildings and improvements	1,323	1,203
Equipment	614	620
Construction in process	2,078	1,645
Total property, plant and equipment	51,874	50,640
Facilities to be retired, net	102
Total net property, plant and equipment	34,122	33,187
Finance leases, gross	335	335
Accumulated amortization of finance leases	33	23
Capitalized Interest Costs [Abstract]
Capitalized interest	29	28	30
Duke Energy Carolinas | Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	1,856	1,837
Accumulated depreciation and amortization	(1,064)	(1,010)
Duke Energy Carolinas | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(17,854)	(17,453)
Duke Energy Carolinas | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	44,910	44,059
Duke Energy Carolinas | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	550	740
Progress Energy
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	957	908
Other buildings and improvements	1,563	1,521
Equipment	791	759
Construction in process	2,297	2,013
Total property, plant and equipment	60,894	57,892
Facilities to be retired, net	26	29
Total net property, plant and equipment	41,706	39,553
Finance leases, gross	729	416
Accumulated amortization of finance leases	178	141
Capitalized Interest Costs [Abstract]
Capitalized interest	20	17	31
Progress Energy | Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	1,325	1,447
Accumulated depreciation and amortization	(735)	(822)
Progress Energy | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(19,214)	(18,368)
Progress Energy | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	53,447	50,785
Progress Energy | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	514	459
Duke Energy Progress
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	482	463
Other buildings and improvements	1,115	1,070
Equipment	497	498
Construction in process	954	709
Total property, plant and equipment	37,018	35,759
Facilities to be retired, net	26	29
Total net property, plant and equipment	23,657	22,987
Finance leases, gross	627	297
Accumulated amortization of finance leases	45	24
Capitalized Interest Costs [Abstract]
Capitalized interest	14	12	28
Duke Energy Progress | Nuclear fuel
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Nuclear fuel	1,325	1,447
Accumulated depreciation and amortization	(735)	(822)
Duke Energy Progress | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(13,387)	(12,801)
Duke Energy Progress | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	32,417	31,375
Duke Energy Progress | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	228	197
Duke Energy Florida
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	475	445
Other buildings and improvements	437	441
Equipment	294	261
Construction in process	1,343	1,304
Total property, plant and equipment	23,865	22,123
Total net property, plant and equipment	18,046	16,563
Finance leases, gross	102	119
Accumulated amortization of finance leases	133	117
Capitalized Interest Costs [Abstract]
Capitalized interest	6	5	3
Duke Energy Florida | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(5,819)	(5,560)
Duke Energy Florida | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	21,030	19,410
Duke Energy Florida | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	286	262
Duke Energy Ohio
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	219	171
Other buildings and improvements	287	294
Equipment	403	385
Construction in process	515	407
Total property, plant and equipment	11,725	11,022
Facilities to be retired, net	6
Total net property, plant and equipment	8,625	8,009
Capitalized Interest Costs [Abstract]
Capitalized interest	20	26	22
Duke Energy Ohio | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(3,106)	(3,013)
Duke Energy Ohio | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	6,573	6,255
Duke Energy Ohio | Regulated | Natural gas transmission and distribution
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	3,347	3,136
Duke Energy Ohio | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	381	374
Duke Energy Indiana
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	122	118
Other buildings and improvements	253	309
Equipment	262	238
Construction in process	460	409
Total property, plant and equipment	17,343	17,382
Total net property, plant and equipment	11,760	11,721
Finance leases, gross	10	10
Accumulated amortization of finance leases	3	3
Capitalized Interest Costs [Abstract]
Capitalized interest	(17)	10	26
Duke Energy Indiana | PISCC Amortization
Capitalized Interest Costs [Abstract]
Capitalized interest	(24)
Duke Energy Indiana | Debt Component
Capitalized Interest Costs [Abstract]
Capitalized interest	7
Duke Energy Indiana | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(5,583)	(5,661)
Duke Energy Indiana | Regulated | Electric generation, distribution and transmission
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	15,925	16,008
Duke Energy Indiana | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	321	300
Piedmont
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Land	279	279
Other buildings and improvements	368	324
Equipment	122	122
Construction in process	262	581
Total property, plant and equipment	9,918	9,134
Facilities to be retired, net	11
Total net property, plant and equipment	8,030	7,385
Capitalized Interest Costs [Abstract]
Capitalized interest	9	8	$ 26
Piedmont | Regulated
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Accumulated depreciation and amortization	(1,899)	(1,749)
Piedmont | Regulated | Natural gas transmission and distribution
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Plant - transmission and distribution	8,732	7,663
Piedmont | Regulated | Other buildings and improvements
Public Utilities, Property, Plant and Equipment, Net [Abstract]
Other buildings and improvements	$ 155	$ 165