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Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | $ 205 | $ 216
Cumulative Change in Accounting Principle | 204 | 214
Write-Offs | (32) | (42)
Credit Loss Expense | 10 | 16
Other Adjustments | 21 | 24
Ending balance | 204 | 214
Duke Energy Carolinas |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 56 | 68
Cumulative Change in Accounting Principle | 62 | 70
Write-Offs | (12) | (20)
Credit Loss Expense | 7 | 7
Other Adjustments | 11 | 15
Ending balance | 62 | 70
Progress Energy |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 74 | 81
Cumulative Change in Accounting Principle | 73 | 75
Write-Offs | (16) | (22)
Credit Loss Expense | 9 | 6
Other Adjustments | 6 | 10
Ending balance | 73 | 75
Duke Energy Progress |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 44 | 44
Cumulative Change in Accounting Principle | 47 | 45
Write-Offs | (7) | (9)
Credit Loss Expense | 4 | 1
Other Adjustments | 6 | 9
Ending balance | 47 | 45
Duke Energy Florida |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 31 | 36
Cumulative Change in Accounting Principle | 27 | 30
Write-Offs | (9) | (12)
Credit Loss Expense | 5 | 5
Other Adjustments | 0 | 1
Ending balance | 27 | 30
Duke Energy Ohio |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 9 | 6
Cumulative Change in Accounting Principle | 41 | 7
Write-Offs | 0 | 0
Credit Loss Expense | 1 | 1
Other Adjustments | 31 | 0
Ending balance | 41 | 7
Duke Energy Indiana |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 5 | 4
Cumulative Change in Accounting Principle | 16 | 4
Write-Offs | 0 | 0
Credit Loss Expense | 2 | 0
Other Adjustments | 9 | 0
Ending balance | 16 | 4
Piedmont |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |
Beginning balance | 11 | 14
Cumulative Change in Accounting Principle | 12 | 14
Write-Offs | (1) | (1)
Credit Loss Expense | 2 | 1
Other Adjustments | 0 | 0
Ending balance | $ 12 | $ 14

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