Condensed Consolidated Statements of Changes in Equity - Duke Energy Indiana - USD ($) $ in Millions	Total	Duke Energy Indiana	Duke Energy Indiana Member's Equity	Duke Energy Indiana Pension and OPEB Adjustments
Beginning balance at Dec. 31, 2022		$ 4,703	$ 4,702	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 804	106	106
Distributions to parent	(776)	(75)	(75)
Other	(2)
Ending balance at Mar. 31, 2023		4,734	4,733	1
Beginning balance at Dec. 31, 2023		5,013	5,012	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,138	67	67
Distributions to parent	$ (792)
Other		(2)	(1)	$ (1)
Ending balance at Mar. 31, 2024		$ 5,078	$ 5,078