Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Unbilled receivables	$ 1,457	$ 922
Current	2,347	1,941
Deferred Payment Arrangements	160	115
Trade and Other Receivables	4,631	3,643
1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	261	288
30-60 days
Financing Receivable, Past Due [Line Items]
Past due	123	98
60-90 days
Financing Receivable, Past Due [Line Items]
Past due	74	118
91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	209	161
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled receivables	486	316
Current	577	592
Deferred Payment Arrangements	57	55
Trade and Other Receivables	1,334	1,186
Duke Energy Carolinas | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	96	77
Duke Energy Carolinas | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	23	30
Duke Energy Carolinas | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	25	32
Duke Energy Carolinas | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	70	84
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled receivables	355	266
Current	1,059	716
Deferred Payment Arrangements	62	45
Trade and Other Receivables	1,689	1,289
Progress Energy | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	60	128
Progress Energy | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	61	49
Progress Energy | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	18	48
Progress Energy | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	74	37
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled receivables	232	193
Current	637	405
Deferred Payment Arrangements	35	22
Trade and Other Receivables	1,004	722
Duke Energy Progress | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	15	44
Duke Energy Progress | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	49	21
Duke Energy Progress | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	9	28
Duke Energy Progress | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	27	9
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled receivables	123	73
Current	417	311
Deferred Payment Arrangements	27	23
Trade and Other Receivables	680	565
Duke Energy Florida | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	45	82
Duke Energy Florida | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	12	28
Duke Energy Florida | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	9	20
Duke Energy Florida | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	47	28
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled receivables	20	4
Current	15	42
Deferred Payment Arrangements	4	2
Trade and Other Receivables	79	100
Duke Energy Ohio | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	5	4
Duke Energy Ohio | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	6	1
Duke Energy Ohio | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	3	23
Duke Energy Ohio | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	26	24
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled receivables	28	27
Current	52	50
Trade and Other Receivables	116	103
Duke Energy Indiana | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	17	5
Duke Energy Indiana | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	2	10
Duke Energy Indiana | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	11	5
Duke Energy Indiana | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	6	6
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled receivables	160	106
Current	265	202
Deferred Payment Arrangements	1	4
Trade and Other Receivables	450	333
Piedmont | 1 - 30 days
Financing Receivable, Past Due [Line Items]
Past due	15	12
Piedmont | 30-60 days
Financing Receivable, Past Due [Line Items]
Past due	3	2
Piedmont | 60-90 days
Financing Receivable, Past Due [Line Items]
Past due	2	4
Piedmont | 91+ days past due
Financing Receivable, Past Due [Line Items]
Past due	$ 4	$ 3