Condensed Consolidated Statements of Changes in Equity - Duke Energy Ohio - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Duke Energy Ohio	Duke Energy Ohio Common Stock	Duke Energy Ohio Additional Paid-in Capital	Duke Energy Ohio Retained Earnings
Beginning Balance (Attributable to Parent) at Dec. 31, 2021		$ 1	$ 44,371	$ 3,265	$ 4,464	$ 762	$ 3,100	$ 602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186				236			236
Other	3		2	1	1			1
Ending Balance (Attributable to Parent) at Sep. 30, 2022		1	44,397	4,063	4,701	762	3,100	839
Beginning Balance (Attributable to Parent) at Jun. 30, 2022		1	44,373	3,457	4,597	762	3,100	735
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422				103			103
Other	2		3	(1)	1			1
Ending Balance (Attributable to Parent) at Sep. 30, 2022		1	44,397	4,063	4,701	762	3,100	839
Beginning Balance (Attributable to Parent) at Dec. 31, 2022	49,322	1	44,862	2,637	4,766	762	3,100	904
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836				251			251
Other	(1)		(6)	1
Ending Balance (Attributable to Parent) at Sep. 30, 2023	49,006	1	44,886	2,036	5,017	762	3,100	1,155
Beginning Balance (Attributable to Parent) at Jun. 30, 2023		1	44,866	1,615	4,937	762	3,100	1,075
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252				80			80
Other	2		(2)	1
Ending Balance (Attributable to Parent) at Sep. 30, 2023	$ 49,006	$ 1	$ 44,886	$ 2,036	$ 5,017	$ 762	$ 3,100	$ 1,155