Other Income and Expenses, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	$ 27	$ 13	$ 30
AFUDC equity	197	171	154
Post in-service equity returns	34	39	27
Nonoperating income, other	134	413	240
Other income and expense, net	392	636	451
Duke Energy Carolinas
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	2	4	4
AFUDC equity	98	65	62
Post in-service equity returns	14	21	17
Nonoperating income, other	107	180	94
Other income and expense, net	221	270	177
Progress Energy
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	24	8	8
AFUDC equity	68	51	42
Post in-service equity returns	18	16	8
Nonoperating income, other	71	140	71
Other income and expense, net	181	215	129
Duke Energy Progress
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	4	6	2
AFUDC equity	52	34	29
Post in-service equity returns	18	16	8
Nonoperating income, other	40	87	36
Other income and expense, net	114	143	75
Duke Energy Florida
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	20	2	6
AFUDC equity	16	16	12
Nonoperating income, other	38	53	35
Other income and expense, net	74	71	53
Duke Energy Ohio
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	11	4	4
AFUDC equity	7	7	7
Post in-service equity returns	1	1	1
Nonoperating income, other		6	4
Other income and expense, net	19	18	16
Duke Energy Indiana
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	15	6	6
AFUDC equity	13	27	23
Post in-service equity returns	1	1	1
Nonoperating income, other	7	8	7
Other income and expense, net	36	42	37
Piedmont
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	19	19	17
AFUDC equity	11	20	19
Nonoperating income, other	16	16	15
Other income and expense, net	$ 46	$ 55	$ 51