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Leases (Lease Costs) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | $ 236 | $ 229
Short-term lease expense | 5 | 4
Variable lease expense | 27 | 61
Finance lease expense |  |
Amortization of leased assets | 160 | 151
Interest on lease liabilities | 46 | 50
Total finance lease expense | 206 | 201
Total lease expense | 474 | 495
Duke Energy Carolinas |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 41 | 39
Variable lease expense | 2 | 1
Finance lease expense |  |
Amortization of leased assets | 7 | 6
Interest on lease liabilities | 31 | 32
Total finance lease expense | 38 | 38
Total lease expense | 81 | 76
Progress Energy |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 157 | 153
Short-term lease expense | 2 | 1
Variable lease expense | 22 | 60
Finance lease expense |  |
Amortization of leased assets | 57 | 61
Interest on lease liabilities | 45 | 49
Total finance lease expense | 102 | 110
Total lease expense | 283 | 324
Duke Energy Progress |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 80 | 83
Short-term lease expense | 1 |
Variable lease expense | 11 | 37
Finance lease expense |  |
Amortization of leased assets | 35 | 41
Interest on lease liabilities | 43 | 45
Total finance lease expense | 78 | 86
Total lease expense | 170 | 206
Duke Energy Florida |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 77 | 70
Short-term lease expense | 1 | 1
Variable lease expense | 11 | 23
Finance lease expense |  |
Amortization of leased assets | 22 | 20
Interest on lease liabilities | 2 | 4
Total finance lease expense | 24 | 24
Total lease expense | 113 | 118
Duke Energy Ohio |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 11 | 10
Finance lease expense |  |
Total lease expense | 11 | 10
Duke Energy Indiana |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 17 | 19
Short-term lease expense | 1 | 2
Finance lease expense |  |
Interest on lease liabilities | 1 | 1
Total finance lease expense | 1 | 1
Total lease expense | 19 | 22
Piedmont |  |
Lessee, Lease, Description [Line Items] |  |
Operating lease expense | 2 | 6
Variable lease expense | 1 | 1
Finance lease expense |  |
Total lease expense | $ 3 | $ 7

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