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Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | $ 216 | $ 121
Cumulative Change in Accounting Principle | 214 | 139
Write-Offs | (42) | (23)
Credit Loss Expense | 16 | 24
Other Adjustments | 24 | 17
Ending balance | 214 | 139
Duke Energy Carolinas |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 68 | 42
Cumulative Change in Accounting Principle | 70 | 52
Write-Offs | (20) | (9)
Credit Loss Expense | 7 | 5
Other Adjustments | 15 | 14
Ending balance | 70 | 52
Progress Energy |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 81 | 36
Cumulative Change in Accounting Principle | 75 | 51
Write-Offs | (22) | (10)
Credit Loss Expense | 6 | 12
Other Adjustments | 10 | 13
Ending balance | 75 | 51
Duke Energy Progress |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 44 | 21
Cumulative Change in Accounting Principle | 45 | 31
Write-Offs | (9) | (2)
Credit Loss Expense | 1 | 4
Other Adjustments | 9 | 8
Ending balance | 45 | 31
Duke Energy Florida |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 36 | 16
Cumulative Change in Accounting Principle | 30 | 21
Write-Offs | (12) | (8)
Credit Loss Expense | 5 | 8
Other Adjustments | 1 | 5
Ending balance | 30 | 21
Duke Energy Ohio |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 6 | 4
Cumulative Change in Accounting Principle | 7 | 4
Credit Loss Expense | 1 |
Ending balance | 7 | 4
Duke Energy Indiana |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 4 | 3
Cumulative Change in Accounting Principle | 4 | 3
Ending balance | 4 | 3
Piedmont |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 14 | 15
Cumulative Change in Accounting Principle | 14 | 17
Write-Offs | (1) | (1)
Credit Loss Expense | 1 | 3
Ending balance | $ 14 | $ 17

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