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Employee Benefit Plans (Employee Savings Plans) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |
Matching contribution percentage | 100.00% |  |
Eligible pay percentage | 6.00% |  |
Additional contribution percentage for employees not participating in defined pension plans | 4.00% |  |
Employer contributions | $ 246 | $ 229 | $ 213
Vesting period (in years) | 3 years |  |
Duke Energy Carolinas |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | $ 76 | 70 | 67
Progress Energy |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 65 | 60 | 57
Duke Energy Progress |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 43 | 39 | 38
Duke Energy Florida |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 22 | 21 | 19
Duke Energy Ohio |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 6 | 5 | 5
Duke Energy Indiana |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | 12 | 12 | 11
Piedmont |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employer contributions | $ 13 | $ 11 | $ 13
Minimum | Piedmont |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Additional contribution percentage for employees not participating in defined pension plans | 3.00% |  |
Maximum | Piedmont |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Additional contribution percentage for employees not participating in defined pension plans | 5.00% |  |

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- Definition Percentage of eligible pay per period contributed to an employee's 401(k) account in lieu of participation in Duke Energy's defined pension plans. + References No definition available. + Details
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- Definition Defined Contribution Plan Additional Contribution Percentage For Employees Not Participating In Defined Pension Plans, Vesting Period + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Details
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