Employee Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2023
Defined Benefit Plan Disclosure [Line Items]
Maximum years of participation (in years)	35 years
Matching contribution (as a percent)	100.00%
Eligible pay (as a percent)	6.00%
Additional contribution for employees not participating in defined pension plans (as a percent)	4.00%
Vesting period (in years)	3 years
Minimum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Average Earnings, Period	3 years
Maximum
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Average Earnings, Period	5 years
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)	100.00%
Fair value of securities on loan	$ 2	$ 390
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 676	(1,547)
Average remaining service period (in years)	12 years
Accumulated Benefit Obligation at measurement date	$ 6,267	6,324
Projected benefit obligation	6,299	6,358	$ 8,207
Benefits paid	607	753
Employer contributions	$ 100	$ 58
Expected long-term rate of return on plan assets (as a percent)	8.25%	6.50%	6.50%
Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	$ 224
Projected benefit obligation	224
Benefits paid	24
Employer contributions	$ 24
Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets (as a percent)
Pension Plan | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Master trust allocation (as a percent)	98.00%	98.00%
Expected long-term rate of return on plan assets (as a percent)	7.00%
Pension Plan | Master Trust | Liability Hedging Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)				35.00%
Pension Plan | Master Trust | Return Seeking Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)				65.00%
Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 19	$ (31)
Average remaining service period (in years)	7 years
Projected benefit obligation	$ 347	437	$ 625
Benefits paid	58	$ 68
Employer contributions	$ 42
Expected long-term rate of return on plan assets (as a percent)		6.50%	6.50%
Other Post-Retirement Benefit Plans | Minimum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets (as a percent)	6.50%
Other Post-Retirement Benefit Plans | Maximum
Defined Benefit Plan Disclosure [Line Items]
Expected long-term rate of return on plan assets (as a percent)	8.25%
Other Post-Retirement Benefit Plans | Master Trust
Defined Benefit Plan Disclosure [Line Items]
Master trust allocation (as a percent)	2.00%	2.00%
Expected long-term rate of return on plan assets (as a percent)	8.50%
Target allocation (as a percent)	100.00%
Other Post-Retirement Benefit Plans | Master Trust | Liability Hedging Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)				80.00%
Other Post-Retirement Benefit Plans | Master Trust | Return Seeking Assets
Defined Benefit Plan Disclosure [Line Items]
Target allocation (as a percent)				20.00%
Duke Energy Carolinas | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 183	$ (411)
Average remaining service period (in years)	11 years
Accumulated Benefit Obligation at measurement date	$ 1,517	1,556
Projected benefit obligation	1,514	1,554	$ 1,903
Benefits paid	177	159
Employer contributions	26	15
Duke Energy Carolinas | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	10
Projected benefit obligation	10
Benefits paid	1
Employer contributions	1
Duke Energy Carolinas | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 8	(19)
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 69	112	149
Benefits paid	14	16
Employer contributions	6
Progress Energy | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 229	(506)
Average remaining service period (in years)	14 years
Accumulated Benefit Obligation at measurement date	$ 1,975	1,959
Projected benefit obligation	1,990	1,975	2,560
Benefits paid	159	184
Employer contributions	22	13
Progress Energy | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	78
Projected benefit obligation	78
Benefits paid	8
Employer contributions	$ 8
Progress Energy | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Average remaining service period (in years)	5 years
Projected benefit obligation	$ 146	168	263
Benefits paid	22	26
Employer contributions	20
Duke Energy Progress | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 107	(240)
Average remaining service period (in years)	12 years
Accumulated Benefit Obligation at measurement date	$ 912	910
Projected benefit obligation	911	909	1,153
Benefits paid	80	101
Employer contributions	13	8
Duke Energy Progress | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	23
Projected benefit obligation	23
Benefits paid	3
Employer contributions	$ 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	$ 84	95	147
Benefits paid	11	$ 13
Employer contributions	11
Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Fair value evaluation period (in years)		5 years
Duke Energy Florida | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	120	$ (262)
Accumulated Benefit Obligation at measurement date	1,053	1,038
Projected benefit obligation	1,069	1,055	1,392
Benefits paid	78	82
Employer contributions	9	5
Duke Energy Florida | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	31
Projected benefit obligation	31
Benefits paid	3
Employer contributions	$ 3
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	$ 60	69	112
Benefits paid	10	13
Employer contributions	10
Duke Energy Indiana | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 45	(107)
Average remaining service period (in years)	14 years
Accumulated Benefit Obligation at measurement date	$ 494	495
Projected benefit obligation	496	499	680
Benefits paid	40	66
Employer contributions	8	5
Duke Energy Indiana | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	2
Projected benefit obligation	$ 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	$ 24	30	54
Benefits paid	6	8
Employer contributions	6
Piedmont | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 23	(64)
Average remaining service period (in years)	9 years
Accumulated Benefit Obligation at measurement date	$ 176	170
Projected benefit obligation	175	170	273
Benefits paid	16	69
Employer contributions	3	2
Piedmont | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	2
Projected benefit obligation	2
Piedmont | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 4	(7)
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 15	21	27
Benefits paid	2	2
Employer contributions	1
Duke Energy Ohio | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	29	(68)
Accumulated Benefit Obligation at measurement date	317	327
Projected benefit obligation	325	333	450
Benefits paid	31	50
Employer contributions	5	3
Duke Energy Ohio | Pension Plan | Nonqualified Plan
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation at measurement date	2
Projected benefit obligation	2
Duke Energy Ohio | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Actual return on plan assets	$ 1	(2)
Average remaining service period (in years)	6 years
Projected benefit obligation	$ 19	20	$ 25
Benefits paid	3	4
Employer contributions	$ 2
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
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		3
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		5
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		5
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		1
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Piedmont
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		6
Duke Energy Retirement Cash Balance Plan | Other Nonoperating Income (Expense) | Duke Energy Ohio
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		5
Regulatory Assets, Noncurrent | Noncurrent assets
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		95
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Carolinas
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		35
Regulatory Assets, Noncurrent | Noncurrent assets | Progress Energy
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		23
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Progress
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		16
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Florida
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		7
Regulatory Assets, Noncurrent | Noncurrent assets | Duke Energy Indiana
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		8
Regulatory Assets, Noncurrent | Noncurrent assets | Piedmont
Defined Benefit Plan Disclosure [Line Items]
Settlement charge		$ 29