Other Income and Expenses, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	$ 29	$ 27	$ 13
AFUDC equity	198	197	171
Post-in-service equity returns	39	34	39
Nonoperating income, other	332	134	413
Other income and expense, net	598	392	636
Duke Energy Carolinas
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	10	2	4
AFUDC equity	91	98	65
Post-in-service equity returns	19	14	21
Nonoperating income, other	118	107	180
Other income and expense, net	238	221	270
Progress Energy
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	14	24	8
AFUDC equity	67	68	51
Post-in-service equity returns	19	18	16
Nonoperating income, other	101	71	140
Other income and expense, net	201	181	215
Duke Energy Progress
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	9	4	6
AFUDC equity	52	52	34
Post-in-service equity returns	19	18	16
Nonoperating income, other	44	40	87
Other income and expense, net	124	114	143
Duke Energy Florida
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	7	20	2
AFUDC equity	15	16	16
Nonoperating income, other	56	38	53
Other income and expense, net	78	74	71
Duke Energy Ohio
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	25	11	4
AFUDC equity	9	7	7
Post-in-service equity returns	1	1	1
Nonoperating income, other	6		6
Other income and expense, net	41	19	18
Duke Energy Indiana
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	25	15	6
AFUDC equity	10	13	27
Post-in-service equity returns		1	1
Nonoperating income, other	41	7	8
Other income and expense, net	76	36	42
Piedmont
Component Of Other Income Expense Nonoperating [Line Items]
Interest income	19	19	19
AFUDC equity	21	11	20
Nonoperating income, other	17	16	16
Other income and expense, net	$ 57	$ 46	$ 55