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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 |

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- Definition Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(6) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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