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Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 121 | $ 146 | $ 76
Cumulative Change in Accounting Principle | 216 | 121 | 146
Write-Offs | (158) | (58) | (58)
Credit Loss Expense | 160 | 53 | 75
Other Adjustments | 93 | (20) | 48
Ending balance | 216 | 121 | 146
Duke Energy Carolinas |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 42 | 23 | 10
Cumulative Change in Accounting Principle | 68 | 42 | 23
Write-Offs | (73) | (21) | (13)
Credit Loss Expense | 40 | 27 | 13
Other Adjustments | 59 | 13 | 12
Ending balance | 68 | 42 | 23
Progress Energy |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 36 | 37 | 16
Cumulative Change in Accounting Principle | 81 | 36 | 37
Write-Offs | (70) | (25) | (23)
Credit Loss Expense | 72 | 25 | 29
Other Adjustments | 43 | (1) | 13
Ending balance | 81 | 36 | 37
Duke Energy Progress |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 21 | 23 | 8
Cumulative Change in Accounting Principle | 44 | 21 | 23
Write-Offs | (36) | (12) | (8)
Credit Loss Expense | 17 | 11 | 9
Other Adjustments | 42 | (1) | 13
Ending balance | 44 | 21 | 23
Duke Energy Florida |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 16 | 14 | 7
Cumulative Change in Accounting Principle | 36 | 16 | 14
Write-Offs | (34) | (13) | (14)
Credit Loss Expense | 55 | 14 | 20
Other Adjustments | (1) | 1 |
Ending balance | 36 | 16 | 14
Duke Energy Ohio |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 4 | 4 | 4
Cumulative Change in Accounting Principle | 6 | 4 | 4
Credit Loss Expense | 2 |  |
Ending balance | 6 | 4 | 4
Duke Energy Indiana |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 3 | 3 | 3
Cumulative Change in Accounting Principle | 4 | 3 | 3
Credit Loss Expense | 1 |  |
Ending balance | 4 | 3 | 3
Piedmont |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 15 | 12 | 6
Cumulative Change in Accounting Principle | 14 | 15 | 12
Write-Offs | (12) | (9) | (6)
Credit Loss Expense | 11 | 7 | 11
Other Adjustments |  | 5 |
Ending balance | $ 14 | $ 15 | 12
Cumulative Change in Accounting Principle |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance |  |  | 5
Cumulative Change in Accounting Principle |  |  |
Cumulative Change in Accounting Principle | Duke Energy Carolinas |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance |  |  | 1
Cumulative Change in Accounting Principle |  |  |
Cumulative Change in Accounting Principle | Progress Energy |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance |  |  | 2
Cumulative Change in Accounting Principle |  |  |
Cumulative Change in Accounting Principle | Duke Energy Progress |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance |  |  | 1
Cumulative Change in Accounting Principle |  |  |
Cumulative Change in Accounting Principle | Duke Energy Florida |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance |  |  | 1
Cumulative Change in Accounting Principle |  |  |
Cumulative Change in Accounting Principle | Piedmont |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance |  |  | $ 1
Cumulative Change in Accounting Principle |  |  |

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