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Employee Benefit Plans (Contributions to Defined Benefit Pension Plans) (Details) - Pension Plan $ in Millions | 12 Months Ended
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Dec. 31, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | $ 58
Duke Energy Carolinas |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 15
Progress Energy |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 13
Duke Energy Progress |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 8
Duke Energy Florida |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 5
Duke Energy Ohio |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 3
Duke Energy Indiana |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | 5
Piedmont |
Defined Benefit Plan Disclosure [Line Items] |
Employer contributions | $ 2

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