Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	$ 1,123	$ 1,457
Current	2,148	2,347
Deferred Payment Arrangements	112	160
Trade and Other Receivables	4,027	4,631
30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	108	123
60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	41	74
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	244	261
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	251	209
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	441	486
Current	593	577
Deferred Payment Arrangements	36	57
Trade and Other Receivables	1,236	1,334
Duke Energy Carolinas | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	25	23
Duke Energy Carolinas | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	9	25
Duke Energy Carolinas | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	58	96
Duke Energy Carolinas | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	74	70
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	354	355
Current	1,022	1,059
Deferred Payment Arrangements	46	62
Trade and Other Receivables	1,674	1,689
Progress Energy | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	48	61
Progress Energy | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	11	18
Progress Energy | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	124	60
Progress Energy | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	69	74
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	215	232
Current	535	637
Deferred Payment Arrangements	30	35
Trade and Other Receivables	895	1,004
Duke Energy Progress | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	37	49
Duke Energy Progress | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	9
Duke Energy Progress | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	51	15
Duke Energy Progress | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	22	27
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	139	123
Current	485	417
Deferred Payment Arrangements	16	27
Trade and Other Receivables	777	680
Duke Energy Florida | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	11	12
Duke Energy Florida | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	6	9
Duke Energy Florida | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	73	45
Duke Energy Florida | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	47	47
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	3	20
Current	27	15
Deferred Payment Arrangements	3	4
Trade and Other Receivables	97	79
Duke Energy Ohio | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	122	148
Duke Energy Ohio | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	6
Duke Energy Ohio | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	2	3
Duke Energy Ohio | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	3	5
Duke Energy Ohio | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	54	26
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	26	28
Current	104	52
Trade and Other Receivables	182	116
Duke Energy Indiana | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	172	260
Duke Energy Indiana | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	9	2
Duke Energy Indiana | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	8	11
Duke Energy Indiana | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	15	17
Duke Energy Indiana | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	20	6
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	5	160
Current	102	265
Deferred Payment Arrangements	1	1
Trade and Other Receivables	130	450
Piedmont | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	5	3
Piedmont | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	4	2
Piedmont | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	8	15
Piedmont | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	$ 5	$ 4