Employee Benefit Plans (Projected Benefit Obligations Reconciliation of Funded Status to Net Amount Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plan
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	$ 6,299	$ 6,358
Service cost	107	110
Interest cost	325	344
Actuarial (gain)/loss	(106)	94
Benefits paid	(645)	(607)
Obligation at measurement date	5,980	6,299	$ 6,358
Accumulated Benefit Obligation at measurement date	5,948	6,267
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	7,162	6,993
Employer contributions	100	100	58
Actual return on plan assets	270	676
Benefits paid	(645)	(607)
Plan assets at measurement date	6,887	7,162	6,993
Funded status of plan	907	863
Pension Plan | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Benefits paid	(30)
Obligation at measurement date	203
Accumulated Benefit Obligation at measurement date	203
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	30
Pension Plan | Duke Energy Carolinas
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	1,514	1,554
Service cost	36	36
Interest cost	78	84	59
Actuarial (gain)/loss	(13)	11
Benefits paid	(177)	(177)
Transfers	(6)	(6)
Obligation at measurement date	1,444	1,514	1,554
Accumulated Benefit Obligation at measurement date	1,444	1,517
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	1,853	1,815
Employer contributions	26	26	15
Actual return on plan assets	73	183
Benefits paid	(177)	(177)
Transfers	6	6
Plan assets at measurement date	1,781	1,853	1,815
Funded status of plan	337	339
Pension Plan | Duke Energy Carolinas | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Benefits paid	(2)
Obligation at measurement date	8
Accumulated Benefit Obligation at measurement date	8
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	2
Pension Plan | Progress Energy
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	1,990	1,975
Service cost	30	30
Interest cost	103	107	77
Actuarial (gain)/loss	(50)	47
Benefits paid	(198)	(159)
Transfers		10
Obligation at measurement date	1,875	1,990	1,975
Accumulated Benefit Obligation at measurement date	1,861	1,975
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	2,453	2,371
Employer contributions	23	22	13
Actual return on plan assets	98	229
Benefits paid	(198)	(159)
Transfers		(10)
Plan assets at measurement date	2,376	2,453	2,371
Funded status of plan	501	463
Pension Plan | Progress Energy | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Benefits paid	(8)
Obligation at measurement date	72
Accumulated Benefit Obligation at measurement date	72
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	8
Pension Plan | Duke Energy Progress
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	911	909
Service cost	18	18
Interest cost	47	49	35
Actuarial (gain)/loss	(27)	18
Benefits paid	(111)	(80)
Transfers		3
Obligation at measurement date	838	911	909
Accumulated Benefit Obligation at measurement date	838	912
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	1,120	1,083
Employer contributions	14	13	8
Actual return on plan assets	46	107
Benefits paid	(111)	(80)
Transfers		(3)
Plan assets at measurement date	1,069	1,120	1,083
Funded status of plan	231	209
Pension Plan | Duke Energy Progress | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Benefits paid	(3)
Obligation at measurement date	22
Accumulated Benefit Obligation at measurement date	22
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	3
Pension Plan | Duke Energy Florida
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	1,069	1,055
Service cost	12	12
Interest cost	56	57	41
Actuarial (gain)/loss	(22)	29
Benefits paid	(88)	(78)
Transfers		6
Obligation at measurement date	1,027	1,069	1,055
Accumulated Benefit Obligation at measurement date	1,013	1,053
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	1,316	1,271
Employer contributions	9	9	5
Actual return on plan assets	53	120
Benefits paid	(88)	(78)
Transfers		(6)
Plan assets at measurement date	1,290	1,316	1,271
Funded status of plan	263	247
Pension Plan | Duke Energy Florida | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Benefits paid	(3)
Obligation at measurement date	27
Accumulated Benefit Obligation at measurement date	27
Change in Fair Value of Plan Assets [Rollforward]
Employer contributions	3
Pension Plan | Duke Energy Ohio
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	325	333
Service cost	3	3
Interest cost	17	18	13
Actuarial (gain)/loss	(3)	2
Benefits paid	(33)	(31)
Obligation at measurement date	309	325	333
Accumulated Benefit Obligation at measurement date	304	317
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	326	323
Employer contributions	5	5	3
Actual return on plan assets	11	29
Benefits paid	(33)	(31)
Plan assets at measurement date	309	326	323
Funded status of plan		1
Pension Plan | Duke Energy Ohio | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Obligation at measurement date	2
Accumulated Benefit Obligation at measurement date	2
Pension Plan | Duke Energy Indiana
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	496	499
Service cost	6	6
Interest cost	26	27	20
Actuarial (gain)/loss	(16)	4
Benefits paid	(41)	(40)
Obligation at measurement date	471	496	499
Accumulated Benefit Obligation at measurement date	466	494
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	514	501
Employer contributions	8	8	5
Actual return on plan assets	17	45
Benefits paid	(41)	(40)
Plan assets at measurement date	498	514	501
Funded status of plan	27	18
Pension Plan | Duke Energy Indiana | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Obligation at measurement date	1
Accumulated Benefit Obligation at measurement date	1
Pension Plan | Piedmont
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	175	170
Service cost	4	3
Interest cost	9	9	8
Actuarial (gain)/loss	5	9
Benefits paid	(12)	(16)
Obligation at measurement date	181	175	170
Accumulated Benefit Obligation at measurement date	181	176
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	213	203
Employer contributions	3	3	2
Actual return on plan assets	10	23
Benefits paid	(12)	(16)
Plan assets at measurement date	214	213	203
Funded status of plan	33	38
Pension Plan | Piedmont | Nonqualified Plan
Change in Projected Benefit Obligation [Rollforward]
Obligation at measurement date	2
Accumulated Benefit Obligation at measurement date	2
Other Post-Retirement Benefit Plans
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	347	437
Service cost	2	2	3
Interest cost	17	22	17
Plan participants' contributions	3	4
Actuarial (gain)/loss	2	(10)
Benefits paid	(37)	(58)
Transfers		50
Obligation at measurement date	334	347	437
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	156	162
Employer contributions	27
Actual return on plan assets	7	19
Benefits paid	(37)	(58)
Tax refund	5	(13)
Plan participants' contributions	3	4
Employer contributions		42
Plan assets at measurement date	161	156	162
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	(173)	(191)
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	69	112
Service cost		1	1
Interest cost	3	5	4
Plan participants' contributions	1	1
Actuarial (gain)/loss	(2)	(2)
Benefits paid	(8)	(14)
Transfers		34
Obligation at measurement date	63	69	112
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	102	105
Employer contributions	4
Actual return on plan assets	4	8
Benefits paid	(8)	(14)
Tax refund	4	4
Plan participants' contributions	1	1
Employer contributions		6
Plan assets at measurement date	107	102	105
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		(8)
Funded status of plan	44	33
Other Post-Retirement Benefit Plans | Progress Energy
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	146	168
Interest cost	7	9	7
Plan participants' contributions	1	1
Actuarial (gain)/loss	7	(10)
Benefits paid	(15)	(22)
Transfers		0
Obligation at measurement date	146	146	168
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	(1)
Employer contributions	14
Benefits paid	(15)	(22)
Tax refund	0	0
Plan participants' contributions	1	1
Employer contributions		20
Plan assets at measurement date	(1)	(1)
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	(147)	(147)
Other Post-Retirement Benefit Plans | Duke Energy Progress
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	84	95
Interest cost	4	5	4
Plan participants' contributions		1
Actuarial (gain)/loss	5	(6)
Benefits paid	(6)	(11)
Transfers		0
Obligation at measurement date	87	84	95
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	(1)	(2)
Employer contributions	7
Benefits paid	(6)	(11)
Tax refund	0	0
Plan participants' contributions		1
Employer contributions		11
Plan assets at measurement date		(1)	(2)
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	(87)	(85)
Other Post-Retirement Benefit Plans | Duke Energy Florida
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	60	69
Interest cost	3	4	3
Plan participants' contributions		1
Actuarial (gain)/loss	3	(4)
Benefits paid	(6)	(10)
Transfers		0
Obligation at measurement date	60	60	69
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	(1)	(2)
Employer contributions	7
Benefits paid	(6)	(10)
Tax refund	0	0
Plan participants' contributions		1
Employer contributions		10
Plan assets at measurement date		(1)	(2)
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	(60)	(61)
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	19	20
Interest cost	1	1	1
Actuarial (gain)/loss		1
Benefits paid	(2)	(3)
Transfers		0
Obligation at measurement date	18	19	20
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	7	7
Employer contributions	2
Actual return on plan assets		1
Benefits paid	(2)	(3)
Tax refund	0	0
Employer contributions		2
Plan assets at measurement date	7	7	7
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	(11)	(12)
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	24	30
Interest cost	1	1	1
Actuarial (gain)/loss	(2)	(1)
Benefits paid	(3)	(6)
Transfers		0
Obligation at measurement date	20	24	30
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	3	3
Benefits paid	(3)	(6)
Tax refund	0	0
Employer contributions		6
Plan assets at measurement date		3	3
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	(20)	(21)
Other Post-Retirement Benefit Plans | Piedmont
Change in Projected Benefit Obligation [Rollforward]
Obligation at prior measurement date	15	21
Interest cost	1	1	1
Actuarial (gain)/loss		1
Benefits paid	(1)	(2)
Transfers		6
Obligation at measurement date	15	15	21
Change in Fair Value of Plan Assets [Rollforward]
Plan assets at prior measurement date	27	31
Actual return on plan assets	3	4
Benefits paid	(1)	(2)
Tax refund	0	(7)
Employer contributions		1
Plan assets at measurement date	29	27	$ 31
Defined Benefit Plan, Plan Assets, 401(h) Obligation Transferred To (From) Plan		0
Funded status of plan	$ 14	$ 12