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 Accumulated Other Comprehensive (Loss) Income, Net (Losses) Gains on Cash Flow Hedges
Beginning Balance (member's equity) at Dec. 31, 2020		$ 13,154	$ 13,161	$ (7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757	537	537
Common stock dividends	(1,488)	(300)	(300)
Other	0	1	1
Ending Balance (member's equity) at Jun. 30, 2021		13,392	13,399	(7)
Beginning Balance (member's equity) at Mar. 31, 2021		13,466	13,473	(7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765	225	225
Common stock dividends	(744)	(300)	(300)
Other		1	1
Ending Balance (member's equity) at Jun. 30, 2021		13,392	13,399	(7)
Beginning Balance (member's equity) at Dec. 31, 2021		13,891	13,897	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764	668	668
Common stock dividends	(1,521)	(50)	(50)
Other	1
Ending Balance (member's equity) at Jun. 30, 2022		14,509	14,515	(6)
Beginning Balance (member's equity) at Mar. 31, 2022		14,182	14,188	(6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907	328	328
Common stock dividends	(761)
Other	$ 1	(1)	(1)
Ending Balance (member's equity) at Jun. 30, 2022		$ 14,509	$ 14,515	$ (6)