Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($) $ in Millions	Total		Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities	Duke Energy Florida	Duke Energy Florida Member's Equity	Duke Energy Florida Accumulated Other Comprehensive (Loss) Income, Net Unrealized (Losses) Gains on Available-for-Sale-Securities
Beginning Balance (member's equity) at Dec. 31, 2020				$ 7,558	$ 7,560	$ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	$ 1,757			334	334
Other comprehensive (loss) income	(63)	[1]	$ (4)
Other	0			(1)	(1)
Ending Balance (member's equity) at Jun. 30, 2021				7,891	7,893	(2)
Beginning Balance (member's equity) at Mar. 31, 2021				7,674	7,677	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	765			217	217
Other comprehensive (loss) income	(89)	[1]	4	1		1
Other				(1)	(1)
Ending Balance (member's equity) at Jun. 30, 2021				7,891	7,893	(2)
Beginning Balance (member's equity) at Dec. 31, 2021				8,295	8,298	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,764			432	432
Other comprehensive (loss) income	242	[1]	(21)	(2)		(2)
Other	1
Ending Balance (member's equity) at Jun. 30, 2022				8,725	8,730	(5)
Beginning Balance (member's equity) at Mar. 31, 2022				8,465	8,469	(4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	907			261	261
Other comprehensive (loss) income	135	[1]	$ (8)	(1)		(1)
Other	$ 1
Ending Balance (member's equity) at Jun. 30, 2022				$ 8,725	$ 8,730	$ (5)

[1] Net of income tax impacts of approximately $40 million and $27 million for the three months ended June 30, 2022, and 2021, respectively, and $72 million and $19 million for the six months ended June 30, 2022, and 2021, respectively.