Regulatory Matters (Schedule of Regulatory Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	$ 17,010	$ 17,266
Less: Current portion	2,756	3,648
Total noncurrent regulatory assets	14,254	13,618
Total regulatory liabilities	16,119	15,408
Less: Current portion	1,425	1,369
Total noncurrent regulatory liabilities	14,694	14,039
Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	5,397	5,901
COR regulatory liability
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	5,436	5,497
AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	2,289	1,673
Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	583	443
Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	232	266
Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	223	137
DSM/EE
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	58	89
DOE Settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		32
Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	984	1,133
Renewable energy credits
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	241	237
Deferred Nuclear PTC
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	676
AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	3,384	3,214
AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	952	1,179
Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	588	2,486
Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	2,524	2,389
Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,023	890
Nuclear asset securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	771	830
Debt fair value adjustment
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	719	774
Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	352	749
Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,951	407
COR regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	646	371
PISCC and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	331	357
Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	281	275
Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	215	252
Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	257	260
Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	204	243
Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	231	237
Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	228	228
Grid Deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	255	210
Demand side management (DSM) / Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	199	201
CEP deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	195	193
NCEMPA deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	179	172
Derivatives – natural gas supply contracts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	94	147
Deferred pipeline integrity costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	129	133
Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	134	131
COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	110	115
Decoupling
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	162	115
Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	77	86
Coal plant securitization
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	102	8
Qualifying facility contract buyouts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	62	68
Network Integration Transmission Services deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	31	31
Transmission expansion obligation
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	31	30
East Bend deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	24	28
Propane caverns
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	24	26
Tennessee ARM Deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	33	20
Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	512	411
Progress Energy
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	8,265	8,091
Less: Current portion	1,647	1,661
Total noncurrent regulatory assets	6,618	6,430
Total regulatory liabilities	5,780	5,501
Less: Current portion	522	418
Total noncurrent regulatory liabilities	5,258	5,083
Progress Energy | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	1,884	2,008
Progress Energy | COR regulatory liability
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	2,984	2,805
Progress Energy | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	281	208
Progress Energy | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	12
Progress Energy | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	94	14
Progress Energy | DOE Settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		32
Progress Energy | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	291	296
Progress Energy | Renewable energy credits
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	139	138
Progress Energy | Deferred Nuclear PTC
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	95
Progress Energy | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,335	1,230
Progress Energy | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	905	1,127
Progress Energy | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	282	1,173
Progress Energy | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	828	757
Progress Energy | Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	822	682
Progress Energy | Nuclear asset securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	771	830
Progress Energy | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	126	323
Progress Energy | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,238	298
Progress Energy | COR regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	571	337
Progress Energy | PISCC and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	37	42
Progress Energy | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	202	220
Progress Energy | Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	10	15
Progress Energy | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	116	125
Progress Energy | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	70	92
Progress Energy | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	89	80
Progress Energy | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	43	43
Progress Energy | Grid Deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	54	51
Progress Energy | Demand side management (DSM) / Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	199	191
Progress Energy | NCEMPA deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	179	172
Progress Energy | Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	53	42
Progress Energy | COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	29	30
Progress Energy | Decoupling
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	32	15
Progress Energy | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	17	21
Progress Energy | Coal plant securitization
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	39	8
Progress Energy | Qualifying facility contract buyouts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	62	68
Progress Energy | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	156	119
Duke Energy Carolinas
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	4,884	5,480
Less: Current portion	685	1,564
Total noncurrent regulatory assets	4,199	3,916
Total regulatory liabilities	7,210	6,577
Less: Current portion	618	587
Total noncurrent regulatory liabilities	6,592	5,990
Duke Energy Carolinas | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	1,951	2,200
Duke Energy Carolinas | COR regulatory liability
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	1,479	1,641
Duke Energy Carolinas | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	2,289	1,673
Duke Energy Carolinas | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	199	158
Duke Energy Carolinas | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	35	106
Duke Energy Carolinas | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	108	85
Duke Energy Carolinas | DSM/EE
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	53	87
Duke Energy Carolinas | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	413	528
Duke Energy Carolinas | Renewable energy credits
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	102	99
Duke Energy Carolinas | Deferred Nuclear PTC
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	581
Duke Energy Carolinas | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,481	1,559
Duke Energy Carolinas | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	298	1,293
Duke Energy Carolinas | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	668	671
Duke Energy Carolinas | Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	201	208
Duke Energy Carolinas | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	202	405
Duke Energy Carolinas | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	691	97
Duke Energy Carolinas | PISCC and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	42	48
Duke Energy Carolinas | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	54	26
Duke Energy Carolinas | Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	205	237
Duke Energy Carolinas | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	54	58
Duke Energy Carolinas | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	114	125
Duke Energy Carolinas | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	137	152
Duke Energy Carolinas | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	86	87
Duke Energy Carolinas | Grid Deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	201	159
Duke Energy Carolinas | Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	81	89
Duke Energy Carolinas | COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	81	85
Duke Energy Carolinas | Decoupling
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	24
Duke Energy Carolinas | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	60	65
Duke Energy Carolinas | Coal plant securitization
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	63
Duke Energy Carolinas | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	141	116
Duke Energy Progress
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	5,181	5,488
Less: Current portion	626	942
Total noncurrent regulatory assets	4,555	4,546
Total regulatory liabilities	4,918	4,675
Less: Current portion	348	300
Total noncurrent regulatory liabilities	4,570	4,375
Duke Energy Progress | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	1,320	1,420
Duke Energy Progress | COR regulatory liability
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	2,984	2,805
Duke Energy Progress | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	151	87
Duke Energy Progress | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	12
Duke Energy Progress | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	10	14
Duke Energy Progress | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	207	211
Duke Energy Progress | Renewable energy credits
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	139	138
Duke Energy Progress | Deferred Nuclear PTC
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	95
Duke Energy Progress | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,322	1,218
Duke Energy Progress | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	900	1,110
Duke Energy Progress | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	277	579
Duke Energy Progress | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	439	408
Duke Energy Progress | Storm cost securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	822	682
Duke Energy Progress | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	85	260
Duke Energy Progress | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	276	228
Duke Energy Progress | PISCC and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	37	42
Duke Energy Progress | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	108	126
Duke Energy Progress | Deferred asset – Lee and Harris COLA
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	10	15
Duke Energy Progress | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	45	49
Duke Energy Progress | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	54	68
Duke Energy Progress | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	89	80
Duke Energy Progress | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	43	43
Duke Energy Progress | Grid Deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	54	51
Duke Energy Progress | Demand side management (DSM) / Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	188	182
Duke Energy Progress | NCEMPA deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	179	172
Duke Energy Progress | Nuclear deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	53	42
Duke Energy Progress | COR settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	29	30
Duke Energy Progress | Decoupling
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	32	15
Duke Energy Progress | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	17	21
Duke Energy Progress | Coal plant securitization
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	39	8
Duke Energy Progress | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	83	59
Duke Energy Florida
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	3,086	2,603
Less: Current portion	1,022	720
Total noncurrent regulatory assets	2,064	1,883
Total regulatory liabilities	862	826
Less: Current portion	174	118
Total noncurrent regulatory liabilities	688	708
Duke Energy Florida | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	564	588
Duke Energy Florida | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	130	121
Duke Energy Florida | DOE Settlement
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	84	32
Duke Energy Florida | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	84	85
Duke Energy Florida | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	13	12
Duke Energy Florida | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	5	17
Duke Energy Florida | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	5	594
Duke Energy Florida | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	389	349
Duke Energy Florida | Nuclear asset securitized balance, net
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	771	830
Duke Energy Florida | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	41	63
Duke Energy Florida | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	962	70
Duke Energy Florida | COR regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	571	337
Duke Energy Florida | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	94	94
Duke Energy Florida | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	71	76
Duke Energy Florida | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	16	24
Duke Energy Florida | Qualifying facility contract buyouts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	62	68
Duke Energy Florida | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	86	69
Duke Energy Ohio
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	793	749
Less: Current portion	88	73
Total noncurrent regulatory assets	705	676
Total regulatory liabilities	499	553
Less: Current portion	34	56
Total noncurrent regulatory liabilities	465	497
Duke Energy Ohio | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	432	466
Duke Energy Ohio | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	14	17
Duke Energy Ohio | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities		15
Duke Energy Ohio | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	53	55
Duke Energy Ohio | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	14	17
Duke Energy Ohio | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	8	20
Duke Energy Ohio | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	131	123
Duke Energy Ohio | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	5	12
Duke Energy Ohio | COR regulatory asset
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	75	34
Duke Energy Ohio | PISCC and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	15	15
Duke Energy Ohio | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	44	49
Duke Energy Ohio | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	8	13
Duke Energy Ohio | Incremental COVID-19 expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets		25
Duke Energy Ohio | CEP deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	195	193
Duke Energy Ohio | Deferred pipeline integrity costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	28	30
Duke Energy Ohio | Deferred coal ash handling system costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	29
Duke Energy Ohio | Network Integration Transmission Services deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	31	31
Duke Energy Ohio | Transmission expansion obligation
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	31	30
Duke Energy Ohio | East Bend deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	24	28
Duke Energy Ohio | Propane caverns
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	24	26
Duke Energy Ohio | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	131	103
Duke Energy Indiana
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	1,153	996
Less: Current portion	113	102
Total noncurrent regulatory assets	1,040	894
Total regulatory liabilities	1,587	1,668
Less: Current portion	183	209
Total noncurrent regulatory liabilities	1,404	1,459
Duke Energy Indiana | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	725	794
Duke Energy Indiana | COR regulatory liability
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	434	496
Duke Energy Indiana | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	103	77
Duke Energy Indiana | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	139	109
Duke Energy Indiana | Deferred fuel and purchased power
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	21	23
Duke Energy Indiana | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	165	169
Duke Energy Indiana | AROs – coal ash
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	554	408
Duke Energy Indiana | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	212	208
Duke Energy Indiana | Hedge costs deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	23	19
Duke Energy Indiana | Storm cost deferrals
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	17	11
Duke Energy Indiana | PISCC and deferred operating expenses
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	237	241
Duke Energy Indiana | Retired generation facilities
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	25	29
Duke Energy Indiana | Customer connect project
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	19	19
Duke Energy Indiana | Advanced metering infrastructure (AMI)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	12	13
Duke Energy Indiana | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	54	48
Piedmont
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	579	571
Less: Current portion	158	161
Total noncurrent regulatory assets	421	410
Total regulatory liabilities	1,024	1,086
Less: Current portion	68	98
Total noncurrent regulatory liabilities	956	988
Piedmont | Net regulatory liability related to income taxes
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	405	433
Piedmont | COR regulatory liability
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	539	555
Piedmont | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory liabilities	80	98
Piedmont | AROs – nuclear and other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	29	26
Piedmont | Accrued pension and OPEB
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	144	129
Piedmont | Vacation accrual
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	14	13
Piedmont | Demand side management (DSM) / Energy efficiency (EE)
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	24	9
Piedmont | Derivatives – natural gas supply contracts
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	94	147
Piedmont | Deferred pipeline integrity costs
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	101	103
Piedmont | Decoupling
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	77	75
Piedmont | Tennessee ARM Deferral
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	33	20
Piedmont | Other
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	49	$ 49
Piedmont | Pipeline Integrity Management – Transmission/Distribution
Regulatory Assets Liabilities [Line Items]
Total regulatory assets	$ 14