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Revenue (Reserve for Credit Losses for Trade and Other Receivables) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | $ 204 | $ 214 | $ 205 | $ 216
Cumulative Change in Accounting Principle | 207 | 199 | 207 | 199
Write-Offs | (36) | (43) | (68) | (85)
Credit Loss Expense | 35 | 23 | 45 | 39
Other Adjustments | 4 | 5 | 25 | 29
Ending balance | 207 | 199 | 207 | 199
Duke Energy Carolinas |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 62 | 70 | 56 | 68
Cumulative Change in Accounting Principle | 65 | 57 | 65 | 57
Write-Offs | (16) | (20) | (28) | (40)
Credit Loss Expense | 10 | 6 | 17 | 13
Other Adjustments | 9 | 1 | 20 | 16
Ending balance | 65 | 57 | 65 | 57
Progress Energy |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 73 | 75 | 74 | 81
Cumulative Change in Accounting Principle | 73 | 73 | 73 | 73
Write-Offs | (17) | (18) | (33) | (40)
Credit Loss Expense | 11 | 12 | 20 | 18
Other Adjustments | 6 | 4 | 12 | 14
Ending balance | 73 | 73 | 73 | 73
Duke Energy Progress |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 47 | 45 | 44 | 44
Cumulative Change in Accounting Principle | 47 | 43 | 47 | 43
Write-Offs | (12) | (10) | (19) | (19)
Credit Loss Expense | 6 | 4 | 10 | 5
Other Adjustments | 6 | 4 | 12 | 13
Ending balance | 47 | 43 | 47 | 43
Duke Energy Florida |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 27 | 30 | 31 | 36
Cumulative Change in Accounting Principle | 26 | 30 | 26 | 30
Write-Offs | (5) | (8) | (14) | (20)
Credit Loss Expense | 5 | 8 | 10 | 13
Other Adjustments | (1) | 0 | (1) | 1
Ending balance | 26 | 30 | 26 | 30
Duke Energy Ohio |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 41 | 7 | 9 | 6
Cumulative Change in Accounting Principle | 42 | 8 | 42 | 8
Write-Offs | 0 | 0 | 0 | 0
Credit Loss Expense | 1 | 1 | 2 | 2
Other Adjustments | 0 | 0 | 31 | 0
Ending balance | 42 | 8 | 42 | 8
Duke Energy Indiana |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 16 | 4 | 5 | 4
Cumulative Change in Accounting Principle | 16 | 4 | 16 | 4
Write-Offs | 0 | 0 | 0 | 0
Credit Loss Expense | 0 | 0 | 2 | 0
Other Adjustments | 0 | 0 | 9 | 0
Ending balance | 16 | 4 | 16 | 4
Piedmont |  |  |  |
Accounts Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning balance | 12 | 14 | 11 | 14
Cumulative Change in Accounting Principle | 11 | 13 | 11 | 13
Write-Offs | (3) | (5) | (4) | (6)
Credit Loss Expense | 2 | 4 | 4 | 5
Other Adjustments | 0 | 0 | 0 | 0
Ending balance | $ 11 | $ 13 | $ 11 | $ 13

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