Condensed Consolidated Statements of Changes in Equity - Duke Energy Carolinas - USD ($) $ in Millions	Total	Duke Energy Carolinas	Duke Energy Carolinas Member's Equity	Duke Energy Carolinas Net Losses on Cash Flow Hedges
Beginning balance at Dec. 31, 2021		$ 13,891	$ 13,897	$ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,186	1,292	1,292
Distributions to parent	(2,297)	(50)	(50)
Other	3
Ending balance at Sep. 30, 2022		15,133	15,139	(6)
Beginning balance at Jun. 30, 2022		14,509	14,515	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,422	624	624
Distributions to parent	(776)
Other	2
Ending balance at Sep. 30, 2022		15,133	15,139	(6)
Beginning balance at Dec. 31, 2022		15,442	15,448	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,836	1,121	1,121
Distributions to parent	(2,346)
Other	(1)	(3)	(3)
Ending balance at Sep. 30, 2023		16,560	16,566	(6)
Beginning balance at Jun. 30, 2023		15,984	15,990	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,252	579	579
Distributions to parent	(793)
Other	$ 2	(3)	(3)
Ending balance at Sep. 30, 2023		$ 16,560	$ 16,566	$ (6)