Related Party Transactions (Other Revenue and Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 22,457	$ 22,042	$ 22,778
Duke Energy Carolinas
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	7,136	6,255	5,799
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	812	823	838
Duke Energy Carolinas | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	44	34	28
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	187	177	600
Related party transaction, other revenues from transactions with related party	35	34	109
Duke Energy Carolinas | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	12	11	12
Progress Energy
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	10,234	10,485	10,297
Progress Energy | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	709	736	818
Progress Energy | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	57	47	43
Progress Energy | Joint Dispatch Agreement (JDA) revenue | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	35	34	109
Related party transaction, other revenues from transactions with related party	187	177	600
Progress Energy | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	75	75	76
Duke Energy Progress
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	5,316	5,041	5,351
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	426	434	469
Duke Energy Progress | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	23	20	20
Duke Energy Progress | Joint Dispatch Agreement (JDA) revenue | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	35	34	109
Related party transaction, other revenues from transactions with related party	187	177	600
Duke Energy Progress | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	75	75	76
Duke Energy Florida
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	4,898	5,426	4,933
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	283	302	349
Duke Energy Florida | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	34	27	23
Duke Energy Ohio
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,968	1,983	2,124
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	304	294	334
Duke Energy Ohio | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	6	5	5
Duke Energy Indiana
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	2,361	2,655	3,656
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	355	365	447
Duke Energy Indiana | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	10	8	8
Piedmont
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	1,098	1,066	1,680
Piedmont | Corporate governance and shared service expenses | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	166	149	155
Piedmont | Indemnification coverages | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	4	4	3
Piedmont | Intercompany natural gas transactions | Related Party
Related Party Transaction [Line Items]
Related party transaction, other revenues from transactions with related party	87	86	88
Piedmont | Natural gas storage and transportation costs | Related Party
Related Party Transaction [Line Items]
Related party transaction, expenses from transactions with related party	$ 23	$ 24	$ 23