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, 2022		$ 15,442	$ 15,448	$ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 804	272	272
Ending balance at Mar. 31, 2023		15,714	15,720	(6)
Beginning balance at Dec. 31, 2023		16,907	16,913	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 1,138	430	430
Ending balance at Mar. 31, 2024		$ 17,337	$ 17,343	$ (6)