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	$ 3,162			631	631
Other comprehensive (loss) income	(53)	[1]	$ (6)
Other	1			(1)	(1)
Ending Balance (member's equity) at Sep. 30, 2021				8,188	8,190	(2)
Beginning Balance (member's equity) at Jun. 30, 2021				7,891	7,893	(2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,405			297	297
Other comprehensive (loss) income	10	[1]	(2)
Other	1
Ending Balance (member's equity) at Sep. 30, 2021				8,188	8,190	(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	3,186			751	751
Other comprehensive (loss) income	242	[1]	(20)	(3)		(3)
Other	3
Ending Balance (member's equity) at Sep. 30, 2022				9,043	9,049	(6)
Beginning Balance (member's equity) at Jun. 30, 2022				8,725	8,730	(5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income Attributable to Duke Energy Corporation	1,422			319	319
Other comprehensive (loss) income	0		$ 1	(1)		(1)
Other	$ 2
Ending Balance (member's equity) at Sep. 30, 2022				$ 9,043	$ 9,049	$ (6)

[1] Net of income tax expense of approximately $72 million for the nine months ended September, 30, 2022 and income tax benefit of $16 million for the nine months ended September 30, 2021. All other periods presented include immaterial income tax impacts.