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