Employee Benefit Plans (Components of Net Periodic Pension Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amortization of regulatory asset	$ 3	$ 3	$ 4
Pension Plan | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	152	176
Service cost	145	168	165
Interest cost	249	220	269
Expected return on plan assets	(558)	(558)	(572)
Amortization of prior service credit	81	133	128
Amortization of prior service cost (credit)	(18)	(29)	(32)
Amortization of settlement charges(c)			18
Amortization of settlement charges	32	9
MRVA method change	24
Net periodic costs	(38)	(49)	(24)
Pension Plan | Duke Energy Carolinas | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	48	56
Service cost	47	54	51
Interest cost	59	51	62
Expected return on plan assets	(152)	(141)	(145)
Amortization of prior service credit	16	29	28
Amortization of prior service cost (credit)	(3)	(8)	(8)
Amortization of settlement charges(c)			9
Amortization of settlement charges	9	5
MRVA method change	0
Net periodic costs	(23)	(8)	(3)
Pension Plan | Progress Energy | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	43	50
Service cost	40	48	48
Interest cost	77	70	85
Expected return on plan assets	(183)	(187)	(190)
Amortization of prior service credit	23	38	41
Amortization of prior service cost (credit)		(2)	(3)
Amortization of settlement charges(c)			7
Amortization of settlement charges	8	2
MRVA method change	24
Net periodic costs	(8)	(29)	(12)
Pension Plan | Duke Energy Progress | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	25	29
Service cost	24	28	27
Interest cost	35	30	38
Expected return on plan assets	(88)	(84)	(87)
Amortization of prior service credit	12	18	18
Amortization of prior service cost (credit)		(1)	(2)
Amortization of settlement charges(c)			6
Amortization of settlement charges	7	2
MRVA method change	0
Net periodic costs	(9)	(6)
Pension Plan | Duke Energy Florida | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	17	21
Service cost	16	20	21
Interest cost	41	39	46
Expected return on plan assets	(94)	(102)	(101)
Amortization of prior service credit	12	20	23
Amortization of prior service cost (credit)		(1)	(1)
Amortization of settlement charges(c)			1
Amortization of settlement charges	1	1
MRVA method change	24
Net periodic costs	1	(22)	(11)
Pension Plan | Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Amortization of regulatory asset	1	1	2
Pension Plan | Duke Energy Ohio | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	4	5
Service cost	4	5	5
Interest cost	13	13	15
Expected return on plan assets	(23)	(28)	(28)
Amortization of prior service credit	4	7	6
Amortization of prior service cost (credit)		(1)
Amortization of settlement charges	5
MRVA method change	0
Net periodic costs	3	(4)	(2)
Pension Plan | Duke Energy Indiana | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	9	10
Service cost	8	9	9
Interest cost	20	18	22
Expected return on plan assets	(37)	(40)	(42)
Amortization of prior service credit	9	13	12
Amortization of prior service cost (credit)	(2)	(2)	(2)
Amortization of settlement charges(c)			1
Amortization of settlement charges	1
MRVA method change	0
Net periodic costs		(1)
Pension Plan | Piedmont | Qualified Plan
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	5	6
Service cost	5	6	6
Interest cost	8	7	9
Expected return on plan assets	(24)	(20)	(21)
Amortization of prior service credit	5	10	9
Amortization of prior service cost (credit)	(7)	(9)	(9)
Amortization of settlement charges(c)			1
Amortization of settlement charges	7	1
MRVA method change	0
Net periodic costs	(6)	(5)	(5)
Other Post-Retirement Benefit Plans
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	3	4	4
Interest cost	17	18	23
Expected return on plan assets	(10)	(11)	(13)
Amortization of prior service credit	2	2	2
Amortization of prior service cost (credit)	(8)	(13)	(14)
Net periodic costs	4		2
Amortization of regulatory asset	4	5	6
Other Post-Retirement Benefit Plans | Duke Energy Carolinas
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	1	1	1
Interest cost	4	4	5
Expected return on plan assets	(6)	(7)	(8)
Amortization of prior service cost (credit)	(3)	(4)	(4)
Net periodic costs	(4)	(6)	(6)
Other Post-Retirement Benefit Plans | Progress Energy
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost		1	1
Interest cost	7	7	10
Amortization of prior service credit	1	1	1
Amortization of prior service cost (credit)	(2)	(2)	(3)
Net periodic costs	6	7	9
Other Post-Retirement Benefit Plans | Duke Energy Progress
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	4	4	5
Amortization of prior service credit	1
Amortization of prior service cost (credit)	(1)	(1)	(1)
Net periodic costs	4	3	4
Other Post-Retirement Benefit Plans | Duke Energy Florida
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	3	3	4
Amortization of prior service credit	1	1	1
Amortization of prior service cost (credit)	(1)	(1)	(2)
Net periodic costs	3	3	3
Other Post-Retirement Benefit Plans | Duke Energy Ohio
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	1	1	1
Amortization of prior service cost (credit)		(1)	(1)
Net periodic costs	1
Amortization of regulatory asset	1	1	1
Other Post-Retirement Benefit Plans | Duke Energy Indiana
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost		1	1
Interest cost	1	1	2
Amortization of prior service credit		4	4
Amortization of prior service cost (credit)		(1)	(1)
Net periodic costs	1	5	6
Other Post-Retirement Benefit Plans | Piedmont
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	1	1	1
Expected return on plan assets	(2)	(2)	(2)
Amortization of prior service cost (credit)	(2)	(2)	(2)
Net periodic costs	$ (3)	$ (3)	$ (3)