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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, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Pension Plan |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | $ 5,980 | $ 6,299 |
Service cost | 100 | 107 |
Interest cost | 329 | 325 |
Actuarial loss (gain) | 86 | (106) |
Benefits paid | (624) | (645) |
Obligation at measurement date | 5,871 | 5,980 | $ 6,299
Accumulated Benefit Obligation at measurement date | 5,839 | 5,948 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 6,887 | 7,162 |
Employer contributions | 100 | 100 | 100
Actual return on plan assets | 847 | 270 |
Benefits paid | (624) | (645) |
Plan assets at measurement date | 7,210 | 6,887 | 7,162
Funded status of plan | 1,339 | 907 |
Pension Plan | Nonqualified Plan |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Benefits paid | (29) |  |
Obligation at measurement date | 187 |  |
Accumulated Benefit Obligation at measurement date | 187 |  |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Employer contributions | 29 |  |
Pension Plan | Duke Energy Carolinas |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 1,444 | 1,514 |
Service cost | 34 | 36 |
Interest cost | 79 | 78 | 84
Actuarial loss (gain) | 32 | (13) |
Benefits paid | (181) | (177) |
Transfers |  | (6) |
Obligation at measurement date | 1,408 | 1,444 | 1,514
Accumulated Benefit Obligation at measurement date | 1,408 | 1,444 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 1,781 | 1,853 |
Employer contributions | 27 | 26 | 26
Actual return on plan assets | 214 | 73 |
Benefits paid | (181) | (177) |
Transfers |  | 6 |
Plan assets at measurement date | 1,841 | 1,781 | 1,853
Funded status of plan | 433 | 337 |
Pension Plan | Duke Energy Carolinas | Nonqualified Plan |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Benefits paid | (1) |  |
Obligation at measurement date | 7 |  |
Accumulated Benefit Obligation at measurement date | 7 |  |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Employer contributions | 1 |  |
Pension Plan | Progress Energy |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 1,875 | 1,990 |
Service cost | 28 | 30 |
Interest cost | 103 | 103 | 107
Actuarial loss (gain) | 39 | (50) |
Benefits paid | (186) | (198) |
Obligation at measurement date | 1,859 | 1,875 | 1,990
Accumulated Benefit Obligation at measurement date | 1,846 | 1,861 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 2,376 | 2,453 |
Employer contributions | 23 | 23 | 22
Actual return on plan assets | 323 | 98 |
Benefits paid | (186) | (198) |
Plan assets at measurement date | 2,536 | 2,376 | 2,453
Funded status of plan | 677 | 501 |
Pension Plan | Progress Energy | Nonqualified Plan |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Benefits paid | (7) |  |
Obligation at measurement date | 69 |  |
Accumulated Benefit Obligation at measurement date | 69 |  |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Employer contributions | 7 |  |
Pension Plan | Duke Energy Progress |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 838 | 911 |
Service cost | 17 | 18 |
Interest cost | 46 | 47 | 49
Actuarial loss (gain) | 16 | (27) |
Benefits paid | (103) | (111) |
Obligation at measurement date | 814 | 838 | 911
Accumulated Benefit Obligation at measurement date | 813 | 838 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 1,069 | 1,120 |
Employer contributions | 14 | 14 | 13
Actual return on plan assets | 145 | 46 |
Benefits paid | (103) | (111) |
Plan assets at measurement date | 1,125 | 1,069 | 1,120
Funded status of plan | 311 | 231 |
Pension Plan | Duke Energy Progress | Nonqualified Plan |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Benefits paid | (2) |  |
Obligation at measurement date | 22 |  |
Accumulated Benefit Obligation at measurement date | 22 |  |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Employer contributions | 2 |  |
Pension Plan | Duke Energy Florida |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 1,027 | 1,069 |
Service cost | 11 | 12 |
Interest cost | 57 | 56 | 57
Actuarial loss (gain) | 23 | (22) |
Benefits paid | (81) | (88) |
Obligation at measurement date | 1,037 | 1,027 | 1,069
Accumulated Benefit Obligation at measurement date | 1,023 | 1,013 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 1,290 | 1,316 |
Employer contributions | 10 | 9 | 9
Actual return on plan assets | 176 | 53 |
Benefits paid | (81) | (88) |
Plan assets at measurement date | 1,395 | 1,290 | 1,316
Funded status of plan | 358 | 263 |
Pension Plan | Duke Energy Florida | Nonqualified Plan |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Benefits paid | (3) |  |
Obligation at measurement date | 25 |  |
Accumulated Benefit Obligation at measurement date | 25 |  |
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 | 309 | 325 |
Service cost | 2 | 3 |
Interest cost | 17 | 17 | 18
Actuarial loss (gain) | 2 | (3) |
Benefits paid | (26) | (33) |
Transfers | (1) |  |
Obligation at measurement date | 305 | 309 | 325
Accumulated Benefit Obligation at measurement date | 300 | 304 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 309 | 326 |
Employer contributions | 6 | 5 | 5
Actual return on plan assets | 31 | 11 |
Benefits paid | (26) | (33) |
Transfers | 1 |  |
Plan assets at measurement date | 321 | 309 | 326
Funded status of plan | 16 |  |
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 | 471 | 496 |
Service cost | 5 | 6 |
Interest cost | 26 | 26 | 27
Actuarial loss (gain) | 8 | (16) |
Benefits paid | (50) | (41) |
Transfers | (14) |  |
Obligation at measurement date | 474 | 471 | 496
Accumulated Benefit Obligation at measurement date | 469 | 466 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 498 | 514 |
Employer contributions | 8 | 8 | 8
Actual return on plan assets | 52 | 17 |
Benefits paid | (50) | (41) |
Transfers | 14 |  |
Plan assets at measurement date | 522 | 498 | 514
Funded status of plan | 48 | 27 |
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 | 181 | 175 |
Service cost | 3 | 4 |
Interest cost | 10 | 9 | 9
Actuarial loss (gain) | (2) | 5 |
Benefits paid | (16) | (12) |
Obligation at measurement date | 176 | 181 | 175
Accumulated Benefit Obligation at measurement date | 176 | 181 |
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 214 | 213 |
Employer contributions | 3 | 3 | 3
Actual return on plan assets | 28 | 10 |
Benefits paid | (16) | (12) |
Plan assets at measurement date | 229 | 214 | 213
Funded status of plan | 53 | 33 |
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 | 334 | 347 |
Service cost | 2 | 2 | 2
Interest cost | 18 | 17 | 22
Plan participants' contributions | 1 | 3 |
Actuarial loss (gain) | 1 | 2 |
Benefits paid | (35) | (37) |
Obligation at measurement date | 321 | 334 | 347
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 161 | 156 |
Employer contributions | 26 |  |
Actual return on plan assets | 18 | 7 |
Benefits paid | (35) | (37) |
Tax refund |  | 5 |
Plan participants' contributions | 1 | 3 |
Employer contributions |  | 27 |
Plan assets at measurement date | 171 | 161 | 156
Funded status of plan | (150) | (173) |
Other Post-Retirement Benefit Plans | Duke Energy Carolinas |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 63 | 69 |
Service cost |  |  | 1
Interest cost | 3 | 3 | 5
Plan participants' contributions |  | 1 |
Actuarial loss (gain) | (1) | (2) |
Benefits paid | (8) | (8) |
Obligation at measurement date | 57 | 63 | 69
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 107 | 102 |
Employer contributions | 3 |  |
Actual return on plan assets | 10 | 4 |
Benefits paid | (8) | (8) |
Tax refund |  | 4 |
Plan participants' contributions |  | 1 |
Employer contributions |  | 4 |
Plan assets at measurement date | 112 | 107 | 102
Funded status of plan | 55 | 44 |
Other Post-Retirement Benefit Plans | Progress Energy |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 146 | 146 |
Interest cost | 8 | 7 | 9
Plan participants' contributions |  | 1 |
Actuarial loss (gain) | 2 | 7 |
Benefits paid | (14) | (15) |
Obligation at measurement date | 142 | 146 | 146
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | (1) | (1) |
Employer contributions | 13 |  |
Benefits paid | (14) | (15) |
Tax refund |  | 0 |
Plan participants' contributions |  | 1 |
Employer contributions |  | 14 |
Plan assets at measurement date | (2) | (1) | (1)
Funded status of plan | (144) | (147) |
Other Post-Retirement Benefit Plans | Duke Energy Progress |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 87 | 84 |
Interest cost | 5 | 4 | 5
Actuarial loss (gain) | 2 | 5 |
Benefits paid | (8) | (6) |
Obligation at measurement date | 86 | 87 | 84
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date |  | (1) |
Employer contributions | 8 |  |
Benefits paid | (8) | (6) |
Tax refund |  | 0 |
Employer contributions |  | 7 |
Plan assets at measurement date |  |  | (1)
Funded status of plan | (86) | (87) |
Other Post-Retirement Benefit Plans | Duke Energy Florida |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 60 | 60 |
Interest cost | 3 | 3 | 4
Actuarial loss (gain) | 1 | 3 |
Benefits paid | (6) | (6) |
Obligation at measurement date | 58 | 60 | 60
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date |  | (1) |
Employer contributions | 6 |  |
Benefits paid | (6) | (6) |
Tax refund |  | 0 |
Employer contributions |  | 7 |
Plan assets at measurement date |  |  | (1)
Funded status of plan | (58) | (60) |
Other Post-Retirement Benefit Plans | Duke Energy Ohio |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 18 | 19 |
Interest cost | 1 | 1 | 1
Benefits paid | (2) | (2) |
Obligation at measurement date | 17 | 18 | 19
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) | (2) |
Tax refund |  | 0 |
Employer contributions |  | 2 |
Plan assets at measurement date | 8 | 7 | 7
Funded status of plan | (9) | (11) |
Other Post-Retirement Benefit Plans | Duke Energy Indiana |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 20 | 24 |
Interest cost | 1 | 1 | 1
Actuarial loss (gain) | 1 | (2) |
Benefits paid | (3) | (3) |
Obligation at measurement date | 19 | 20 | 24
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date |  | 3 |
Employer contributions | 3 |  |
Benefits paid | (3) | (3) |
Tax refund |  | 0 |
Plan assets at measurement date |  |  | 3
Funded status of plan | (19) | (20) |
Other Post-Retirement Benefit Plans | Piedmont |  |  |
Change in Projected Benefit Obligation [Rollforward] |  |  |
Obligation at prior measurement date | 15 | 15 |
Interest cost | 1 | 1 | 1
Actuarial loss (gain) | 1 |  |
Benefits paid | (2) | (1) |
Obligation at measurement date | 15 | 15 | 15
Change in Fair Value of Plan Assets [Rollforward] |  |  |
Plan assets at prior measurement date | 29 | 27 |
Employer contributions | 1 |  |
Actual return on plan assets | 4 | 3 |
Benefits paid | (2) | (1) |
Tax refund |  | 0 |
Plan assets at measurement date | 32 | 29 | $ 27
Funded status of plan | $ 17 | $ 14 |

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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 5 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(1) -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 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-5 Reference 2: 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 3: 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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