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, 2021		$ 5,015	$ 5,015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186	189	189
Other	3
Distributions to parent	(2,297)	(225)	(225)
Ending balance at Sep. 30, 2022		4,979	4,979
Beginning balance at Jun. 30, 2022		4,861	4,861
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422	119	119
Other	2	(1)	(1)
Distributions to parent	(776)
Ending balance at Sep. 30, 2022		4,979	4,979
Beginning balance at Dec. 31, 2022		4,703	4,702	$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836	379	379
Other	(1)
Distributions to parent	(2,346)	(146)	(146)
Ending balance at Sep. 30, 2023		4,936	4,935	1
Beginning balance at Jun. 30, 2023		4,827	4,826	1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252	159	159
Other	2
Distributions to parent	$ (793)	(50)	(50)
Ending balance at Sep. 30, 2023		$ 4,936	$ 4,935	$ 1