Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 22,042	$ 22,778	$ 19,133
Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	6,255	5,799	5,449
Duke Energy Carolinas | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	823	838	894
Duke Energy Carolinas | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	34	28	24
Duke Energy Carolinas | Joint Dispatch Agreement (JDA) revenue | Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	177	600	207
Related party transaction, other revenues from transactions with related party	34	109	41
Duke Energy Carolinas | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	11	12	11
Progress Energy
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	10,485	10,297	8,666
Progress Energy | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	736	818	856
Progress Energy | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	47	43	41
Progress Energy | Joint Dispatch Agreement (JDA) revenue | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	34	109	41
Related party transaction, other revenues from transactions with related party	177	600	207
Progress Energy | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	75	76	75
Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5,041	5,351	4,564
Duke Energy Progress | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	434	469	504
Duke Energy Progress | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	20	20	19
Duke Energy Progress | Joint Dispatch Agreement (JDA) revenue | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	34	109	41
Related party transaction, other revenues from transactions with related party	177	600	207
Duke Energy Progress | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	75	76	75
Duke Energy Florida
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5,426	4,933	4,087
Duke Energy Florida | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	302	349	352
Duke Energy Florida | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	27	23	22
Duke Energy Ohio
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,983	2,124	1,711
Duke Energy Ohio | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	294	334	329
Duke Energy Ohio | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5	5	4
Duke Energy Indiana
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2,655	3,656	2,432
Duke Energy Indiana | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	365	447	409
Duke Energy Indiana | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	8	8	8
Piedmont
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,066	1,680	1,174
Piedmont | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	149	155	139
Piedmont | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	4	3	3
Piedmont | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, other revenues from transactions with related party	86	88	86
Piedmont | Natural gas storage and transportation costs | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 24	$ 23	$ 22