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Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 216 | $ 121 | $ 146
Cumulative Change in Accounting Principle | 205 | 216 | 121
Write-Offs | (164) | (158) | (58)
Credit Loss Expense | 101 | 160 | 53
Other Adjustments | 52 | 93 | (20)
Ending balance | 205 | 216 | 121
Duke Energy Carolinas |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 68 | 42 | 23
Cumulative Change in Accounting Principle | 56 | 68 | 42
Write-Offs | (71) | (73) | (21)
Credit Loss Expense | 35 | 40 | 27
Other Adjustments | 24 | 59 | 13
Ending balance | 56 | 68 | 42
Progress Energy |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 81 | 36 | 37
Cumulative Change in Accounting Principle | 74 | 81 | 36
Write-Offs | (84) | (70) | (25)
Credit Loss Expense | 48 | 72 | 25
Other Adjustments | 29 | 43 | (1)
Ending balance | 74 | 81 | 36
Duke Energy Progress |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 44 | 21 | 23
Cumulative Change in Accounting Principle | 44 | 44 | 21
Write-Offs | (41) | (36) | (12)
Credit Loss Expense | 12 | 17 | 11
Other Adjustments | 29 | 42 | (1)
Ending balance | 44 | 44 | 21
Duke Energy Florida |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 36 | 16 | 14
Cumulative Change in Accounting Principle | 31 | 36 | 16
Write-Offs | (42) | (34) | (13)
Credit Loss Expense | 37 | 55 | 14
Other Adjustments |  | (1) | 1
Ending balance | 31 | 36 | 16
Duke Energy Ohio |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 6 | 4 | 4
Cumulative Change in Accounting Principle | 9 | 6 | 4
Credit Loss Expense | 3 | 2 |
Ending balance | 9 | 6 | 4
Duke Energy Indiana |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 4 | 3 | 3
Cumulative Change in Accounting Principle | 5 | 4 | 3
Credit Loss Expense | 1 | 1 |
Ending balance | 5 | 4 | 3
Piedmont |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 14 | 15 | 12
Cumulative Change in Accounting Principle | 11 | 14 | 15
Write-Offs | (10) | (12) | (9)
Credit Loss Expense | 7 | 11 | 7
Other Adjustments |  |  | 5
Ending balance | $ 11 | $ 14 | $ 15

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