Condensed Consolidated Statements of Changes in Equity - Duke Energy Florida - USD ($) $ in Millions	Total		Duke Energy Florida	Duke Energy Florida Member's Equity	Duke Energy Florida Net Unrealized Gains (Losses) on Available-for-Sale Securities
Beginning balance at Dec. 31, 2020			$ 7,558	$ 7,560	$ (2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 3,908		738	738
Other comprehensive income (loss)	(8)	[1]	(1)		(1)
Distribution to parent	(3,008)
Other	(8)
Ending balance at Dec. 31, 2021			8,295	8,298	(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,550		909	909
Other comprehensive income (loss)	(21)	[1]	(5)		(5)
Distribution to parent	(3,073)		(175)	(175)
Other	3		(1)	(1)	0
Ending balance at Dec. 31, 2022			9,023	9,031	(8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	2,841		1,016	1,016
Other comprehensive income (loss)	8	[1]	3		3
Distribution to parent	(3,138)
Other	$ (2)		1	1
Ending balance at Dec. 31, 2023			$ 10,043	$ 10,048	$ (5)

[1] Net of income tax expense of approximately $40 million and $52 million for the years ended December 31, 2023, and 2022, respectively, and income tax benefit of $17 million for the year ended December 31, 2021.