Condensed Consolidated Statements of Changes in Equity - Duke Energy Indiana - USD ($) $ in Millions	Total	Duke Energy Indiana	Duke Energy Indiana Member's Equity
Beginning Balance (member's equity) at Dec. 31, 2020			$ 4,783
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757	$ 215	215
Distributions to parent	(1,488)
Other	0		1
Ending Balance (member's equity) at Jun. 30, 2021			4,999
Beginning Balance (member's equity) at Mar. 31, 2021			4,896
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765	103	103
Distributions to parent	(744)
Ending Balance (member's equity) at Jun. 30, 2021			4,999
Beginning Balance (member's equity) at Dec. 31, 2021		5,015	5,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764	70	70
Distributions to parent	(1,521)		(225)
Other	1		1
Ending Balance (member's equity) at Jun. 30, 2022		4,861	4,861
Beginning Balance (member's equity) at Mar. 31, 2022			4,824
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907	149	149
Distributions to parent	(761)		(112)
Other	$ 1
Ending Balance (member's equity) at Jun. 30, 2022		$ 4,861	$ 4,861