Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Unbilled receivables	$ 1,273	$ 1,457
Current	2,306	2,347
Deferred payment arrangements	104	160
Trade and Other Receivables	4,336	4,631
1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	275	261
31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	78	123
61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	47	74
91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	253	209
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled receivables	399	486
Current	680	577
Deferred payment arrangements	34	57
Trade and Other Receivables	1,312	1,334
Duke Energy Carolinas | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	97	96
Duke Energy Carolinas | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	20	23
Duke Energy Carolinas | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	15	25
Duke Energy Carolinas | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	67	70
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled receivables	401	355
Current	1,009	1,059
Deferred payment arrangements	43	62
Trade and Other Receivables	1,664	1,689
Progress Energy | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	91	60
Progress Energy | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	34	61
Progress Energy | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	17	18
Progress Energy | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	69	74
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled receivables	280	232
Current	612	637
Deferred payment arrangements	26	35
Trade and Other Receivables	1,016	1,004
Duke Energy Progress | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	41	15
Duke Energy Progress | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	23	49
Duke Energy Progress | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	10	9
Duke Energy Progress | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	24	27
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled receivables	121	123
Current	395	417
Deferred payment arrangements	17	27
Trade and Other Receivables	646	680
Duke Energy Florida | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	50	45
Duke Energy Florida | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	11	12
Duke Energy Florida | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	7	9
Duke Energy Florida | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	45	47
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled receivables	4	20
Current	48	15
Deferred payment arrangements	6	4
Trade and Other Receivables	121	79
Duke Energy Ohio | CRC
Financing Receivable, Past Due [Line Items]
Unbilled receivables	141	148
Duke Energy Ohio | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	12	5
Duke Energy Ohio | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	3	6
Duke Energy Ohio | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	2	3
Duke Energy Ohio | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	46	26
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled receivables	22	28
Current	87	52
Trade and Other Receivables	161	116
Duke Energy Indiana | CRC
Financing Receivable, Past Due [Line Items]
Unbilled receivables	197	260
Duke Energy Indiana | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	14	17
Duke Energy Indiana | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	7	2
Duke Energy Indiana | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	4	11
Duke Energy Indiana | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	27	6
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled receivables	108	160
Current	199	265
Deferred payment arrangements		1
Trade and Other Receivables	322	450
Piedmont | 1-30 days past due
Financing Receivable, Past Due [Line Items]
Past due	9	15
Piedmont | 31-60 days past due
Financing Receivable, Past Due [Line Items]
Past due	2	3
Piedmont | 61-90 days past due
Financing Receivable, Past Due [Line Items]
Past due	1	2
Piedmont | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	$ 3	$ 4