Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2023
Defined Benefit Plan Disclosure [Line Items]
Maximum years of participation (in years)	35 years
Vesting period (in years)	3 years
Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 24
Duke Energy Retirement Cash Balance Plan
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	117
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	22
Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 95
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100.00%
Fair value of securities on loan	$ 390	$ 542
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	58
Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (1,547)	513
Average remaining service period (in years)	13 years
Projected benefit obligation	$ 6,358	8,207	$ 8,634
Accumulated Benefit Obligation at measurement date	6,324	8,144
Employer contributions	58
Benefits paid	$ 753	$ 615
Expected long-term rate of return on plan assets	6.50%	6.50%	6.85%
Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 232
Accumulated Benefit Obligation at measurement date	232
Employer contributions	24
Benefits paid	$ 24
Pension Plan | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Master trust allocation percentage	98.00%
Expected long-term rate of return on plan assets	6.50%
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (31)	$ 15
Average remaining service period (in years)	7 years
Projected benefit obligation	$ 437	625	$ 709
Employer contributions	39
Benefits paid	$ 68	$ 73
Expected long-term rate of return on plan assets	6.50%	6.50%	6.85%
Other Post-Retirement Benefit Plans | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Master trust allocation percentage	2.00%
Expected long-term rate of return on plan assets	8.25%
Target allocation	100.00%
Duke Energy Progress | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 5
Duke Energy Progress | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	16
Duke Energy Progress | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	8
Duke Energy Progress | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (240)	$ 79
Average remaining service period (in years)	13 years
Projected benefit obligation	$ 909	1,153	$ 1,193
Employer contributions	8
Benefits paid	101	80
Duke Energy Progress | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	24
Accumulated Benefit Obligation at measurement date	24
Employer contributions	3
Benefits paid	$ 3
Duke Energy Progress | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	5 years
Projected benefit obligation	$ 95	147	166
Employer contributions	11
Benefits paid	13	16
Duke Energy Ohio | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	5
Duke Energy Ohio | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	3
Duke Energy Ohio | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (68)	26
Average remaining service period (in years)	15 years
Projected benefit obligation	$ 333	450	502
Accumulated Benefit Obligation at measurement date	327	439
Employer contributions	3
Benefits paid	50	50
Duke Energy Ohio | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3
Accumulated Benefit Obligation at measurement date	3
Duke Energy Ohio | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (2)	1
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 20	25	27
Employer contributions	3
Benefits paid	4	3
Progress Energy | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	5
Progress Energy | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	23
Progress Energy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	13
Progress Energy | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (506)	169
Average remaining service period (in years)	14 years
Projected benefit obligation	$ 1,975	2,560	2,715
Accumulated Benefit Obligation at measurement date	1,959	2,529
Employer contributions	13
Benefits paid	184	161
Progress Energy | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	78
Accumulated Benefit Obligation at measurement date	78
Employer contributions	10
Benefits paid	$ 10
Progress Energy | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	5 years
Projected benefit obligation	$ 168	263	299
Employer contributions	23
Benefits paid	$ 26	29
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Fair value evaluation period (in years)	5 years
Duke Energy Florida | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 1
Duke Energy Florida | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	7
Duke Energy Florida | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	5
Duke Energy Florida | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (262)	90
Average remaining service period (in years)	15 years
Projected benefit obligation	$ 1,055	1,392	1,507
Accumulated Benefit Obligation at measurement date	1,038	1,361
Employer contributions	5
Benefits paid	82	81
Duke Energy Florida | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	32
Accumulated Benefit Obligation at measurement date	32
Employer contributions	4
Benefits paid	$ 4
Duke Energy Florida | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	7 years
Projected benefit obligation	$ 69	112	130
Employer contributions	11
Benefits paid	13	13
Duke Energy Carolinas | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	3
Duke Energy Carolinas | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	35
Duke Energy Carolinas | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	15
Duke Energy Carolinas | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (411)	132
Average remaining service period (in years)	12 years
Projected benefit obligation	$ 1,554	1,903	1,988
Employer contributions	15
Benefits paid	159	148
Duke Energy Carolinas | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	10
Accumulated Benefit Obligation at measurement date	10
Employer contributions	1
Benefits paid	1
Duke Energy Carolinas | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (19)	9
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 112	149	174
Employer contributions	3
Benefits paid	16	19
Duke Energy Indiana | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	8
Duke Energy Indiana | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	5
Duke Energy Indiana | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (107)	37
Average remaining service period (in years)	14 years
Projected benefit obligation	$ 499	680	715
Accumulated Benefit Obligation at measurement date	495	672
Employer contributions	5
Benefits paid	66	52
Duke Energy Indiana | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	2
Accumulated Benefit Obligation at measurement date	$ 2
Duke Energy Indiana | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 30	54	61
Employer contributions	4
Benefits paid	$ 8	9
Piedmont
Defined Benefit Plan Disclosure [Line Items]
Term (in years)	3 years
Piedmont | Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense)
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	$ 6
Piedmont | Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge	29
Piedmont | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	2
Piedmont | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (64)	19
Average remaining service period (in years)	9 years
Projected benefit obligation	$ 170	273	293
Accumulated Benefit Obligation at measurement date	170
Employer contributions	2
Benefits paid	69	28
Piedmont | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	3
Accumulated Benefit Obligation at measurement date	3
Piedmont | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ (7)	3
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 21	27	$ 30
Employer contributions	1
Benefits paid	$ 2	$ 2
Liability Hedging Assets | Pension Plan | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				35.00%
Liability Hedging Assets | Other Post-Retirement Benefit Plans | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				80.00%
Return Seeking Assets | Pension Plan | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				65.00%
Return Seeking Assets | Other Post-Retirement Benefit Plans | Master Trust | Subsequent Event
Defined Benefit Plan Disclosure [Line Items]
Target allocation				20.00%
Minimum | Pension Plan | Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets