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, 2022			$ 9,023	$ 9,031	$ (8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 804		205	205
Other comprehensive income (loss)	6	[1]	2		2
Other	(2)		1	1
Ending balance at Mar. 31, 2023			9,231	9,237	(6)
Beginning balance at Dec. 31, 2023			10,043	10,048	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	1,138		179	179
Other comprehensive income (loss)	$ (2)	[1]	0
Ending balance at Mar. 31, 2024			$ 10,222	$ 10,227	$ (5)

[1] Net of income tax expense of approximately $34 million and tax benefit of $8 million for the three months ended March 31, 2024, and 2023, respectively.