Condensed Consolidated Statements of Changes in Equity - Duke Energy Ohio - USD ($) $ in Millions	Total	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 (parent) at Dec. 31, 2020				$ 3,935	$ 762	$ 2,776	$ 397
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757			130			130
Other	0	$ 1	$ 0
Ending Balance (parent) at Jun. 30, 2021				4,065	762	2,776	527
Beginning Balance (parent) at Mar. 31, 2021				4,026	762	2,776	488
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765			39			39
Other		1
Ending Balance (parent) at Jun. 30, 2021				4,065	762	2,776	527
Beginning Balance (parent) at Dec. 31, 2021	49,296			4,464	762	3,100	602
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764			133			133
Other	1	(1)	2
Ending Balance (parent) at Jun. 30, 2022	49,720			4,597	762	3,100	735
Beginning Balance (parent) at Mar. 31, 2022				4,542	762	3,100	680
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907			56			56
Other	1	$ (1)	$ 2	(1)			(1)
Ending Balance (parent) at Jun. 30, 2022	$ 49,720			$ 4,597	$ 762	$ 3,100	$ 735