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, 2020		$ 4,783	$ 4,783
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,908	481	481
Distribution to parent	(3,008)	(250)	(250)
Other	(8)	1	1
Ending balance at Dec. 31, 2021		5,015	5,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,550	137	137
Distribution to parent	(3,073)	(450)	(450)
Other	3	1		$ 1
Ending balance at Dec. 31, 2022		4,703	4,702	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,841	497	497
Distribution to parent	(3,138)	(187)	(187)
Other	$ (2)
Ending balance at Dec. 31, 2023		$ 5,013	$ 5,012	$ 1