Consolidated Statements of Changes in Equity - USD ($) $ in Millions		Total		Preferred Stock	Common Stock	Additional Paid In Capital		Retained Earnings		Net Gains (Losses) on Cash Flow Hedges		Net Unrealized Gains (Losses) on Available-for-Sale Securities		Pension and OPEB Adjustments		Common Stockholders' Equity		Noncontrolling Interests		Duke Energy Carolinas		Duke Energy Carolinas Members Equity		Duke Energy Carolinas Net Gains (Losses) on Cash Flow Hedges	Progress Energy		Progress Energy Additional Paid In Capital	Progress Energy Retained Earnings		Progress Energy Net Gains (Losses) on Cash Flow Hedges		Progress Energy Net Unrealized Gains (Losses) on Available-for-Sale Securities		Progress Energy Pension and OPEB Adjustments		Progress Energy Common Stockholders' Equity		Progress Energy Noncontrolling Interests	Duke Energy Progress	Duke Energy Progress Members Equity	Duke Energy Florida	Duke Energy Florida Members Equity	Duke Energy Florida Net Unrealized Gains (Losses) on Available-for-Sale Securities	Duke Energy Ohio	Duke Energy Ohio Common Stock	Duke Energy Ohio Additional Paid In Capital	Duke Energy Ohio Retained Earnings	Duke Energy Indiana	Duke Energy Indiana Members Equity	Piedmont	Piedmont Common Stock	Piedmont Retained Earnings	Common Stock	Common Stock Common Stock	Common Stock Additional Paid In Capital	Common Stock Common Stockholders' Equity	Series A Preferred Stock	[2]	Series A Preferred Stock Preferred Stock	[2]	Series A Preferred Stock Common Stockholders' Equity	[2]	Series B Preferred Stock	[2]	Series B Preferred Stock Preferred Stock	[2]	Series B Preferred Stock Common Stockholders' Equity	[2]
Beginning Balance (parent) at Dec. 31, 2018		$ 43,834			$ 1	$ 40,795		$ 3,113		$ (14)		$ (3)		$ (75)		$ 43,817		$ 17							$ 14,257		$ 9,143	$ 5,131		$ (12)		$ (1)		$ (7)		$ 14,254		$ 3
Beginning Members' Equity at Dec. 31, 2018																				$ 11,683		$ 11,689		$ (6)																$ 8,441	$ 6,095	$ 6,097	$ (2)						$ 4,339
Beginning Balance (Attributable to Parent) at Dec. 31, 2018																																												$ 3,445	$ 762	$ 2,776	$ (93)			$ 2,091	$ 1,160	$ 931
Balance (in shares) at Dec. 31, 2018																																																						727,000,000
Net income (loss)		3,530						3,707								3,707		(177)
Net (loss) income attributable to Duke Energy		3,748																		1,403		1,403			1,327														$ 805	805	692	692		238			238	$ 436	436	202		202
Net income		3,571																							1,327			1,327								1,327
Contribution from parent																																																		150	150
Other comprehensive income (loss), net of tax		(24)	[1]							(41)		8		9		(24)									8					5		1		2		8					1		1
Stock issuances																																																					$ 552		$ 552	$ 552	$ 973		$ 973		$ 973		$ 989		$ 989		$ 989
Stock issuances (in shares)																																																						6,000,000
Distributions/Dividends to parent		(2,735)						(2,735)								(2,735)				(275)		(275)																											(200)
Sale of noncontrolling interest	[3]	407				(466)				10						(456)		863
Contribution from noncontrolling interest	[4]	428																428
Distributions to noncontrolling interest in subsidiaries		(4)																(4)
Other		1	[5]					23	[5]	(6)	[5]	(2)	[5]	(16)	[5]	(1)	[5]	2	[5]			1		(1)	1	[6]		7	[6]	(3)	[6]	(1)	[6]	(2)	[6]	1	[6]
Ending Balance (parent) at Dec. 31, 2019		47,951		$ 1,962	1	40,881		4,108		(51)		3		(82)		46,822		1,129							15,593		9,143	6,465		(10)		(1)		(7)		15,590		3
Ending Member's Equity at Dec. 31, 2019																				12,811		12,818		(7)																9,246	6,788	6,789	(1)						4,575
Ending Balance (Attributable to Parent) at Dec. 31, 2019																																												3,683	762	2,776	145			2,443	1,310	1,133
Balance (in shares) at Dec. 31, 2019																																																						733,000,000
Net income (loss)		975						1,270								1,270		(295)
Net (loss) income attributable to Duke Energy		1,377																		956		956			1,045														415	415	771	771		252			252	408	408	273		273
Net income		1,082																							1,046			1,045								1,045		1
Other comprehensive income (loss), net of tax		(118)	[1]							(116)		3		6		(107)		(11)							3					5		(1)		(1)		3					(1)		(1)
Stock issuances																																																					2,902		2,902	2,902
Stock issuances (in shares)																																																						36,000,000
Distributions/Dividends to parent		(2,815)						(2,815)								(2,815)				(600)		(600)			(400)			(400)								(400)				(400)									(200)
Contribution from noncontrolling interest	[4]	409				(17)										(17)		426
Distributions to noncontrolling interest in subsidiaries		(30)																(30)
Other		(90)	[7]			1	[7]	(92)	[7]							(91)	[7]	1	[7]	(13)	[8]	(13)	[8]		(1)			(1)								(1)				(1)										(1)		(1)
Ending Balance (parent) at Dec. 31, 2020		49,184		1,962	1	43,767		2,471		(167)		6		(76)		47,964		1,220							16,241		9,143	7,109		(5)		(2)		(8)		16,237		4
Ending Member's Equity at Dec. 31, 2020																				13,154		13,161		(7)															9,260	9,260	7,558	7,560	(2)					4,783	4,783
Ending Balance (Attributable to Parent) at Dec. 31, 2020		47,964																							$ 16,237																			$ 3,935	762	2,776	397			$ 2,715	1,310	1,405
Balance (in shares) at Dec. 31, 2020																									100																			90,000,000						100				769,000,000
Net income (loss)		3,473						3,802								3,802		(329)
Net (loss) income attributable to Duke Energy		3,908																		1,336		1,336			$ 1,598														991	991	738	738		$ 204			204	481	481	$ 310		310
Net income		3,579																							1,599			1,598								1,598		1
Contribution from parent																																												325		325				325	325
Other comprehensive income (loss), net of tax		(56)	[1]							(65)		(8)		7		(66)		10		1				1	4					3				1		4					(1)		(1)
Stock issuances																																																					$ 68		$ 68	$ 68
Distributions/Dividends to parent		(3,008)						(3,008)								(3,008)				(600)		(600)			(700)			(700)								(700)				(700)									(250)
Sale of noncontrolling interest	[9]	999				545										545		454
Contribution from noncontrolling interest	[4]	550																550
Distributions to noncontrolling interest in subsidiaries		(66)																(66)							(1)													(1)
Other		(8)				(9)										(9)		1							5		6									6		(1)								(1)	1		1	(1)		(1)
Ending Balance (parent) at Dec. 31, 2021		51,136		$ 1,962	$ 1	$ 44,371		$ 3,265		$ (232)		$ (2)		$ (69)		$ 49,296		$ 1,840							17,148		$ 9,149	$ 8,007		$ (2)		$ (2)		$ (7)		$ 17,145		$ 3
Ending Member's Equity at Dec. 31, 2021																				$ 13,891		$ 13,897		$ (6)															$ 9,551	$ 9,551	$ 8,295	$ 8,298	$ (3)					$ 5,015	$ 5,015
Ending Balance (Attributable to Parent) at Dec. 31, 2021		$ 49,296																							$ 17,145																			$ 4,464	$ 762	$ 3,100	$ 602			$ 3,349	$ 1,635	$ 1,714
Balance (in shares) at Dec. 31, 2021		769,000,000																							100																			90,000,000						100				769,000,000

[1] Net of income tax impacts of approximately $17 million and $35 million for the years ended December 31, 2021, and 2020, respectively. Tax impacts are immaterial for other periods presented.

[2] Duke Energy issued 40 million depositary shares of preferred stock, Series A, in the first quarter of 2019 and 1 million shares of preferred stock, Series B, in the third quarter of 2019.

[3] Relates to the sale of a noncontrolling interest in the Commercial Renewables segment. See Note 1 for additional discussion of the transaction.

[4] Relates to tax equity financing activity in the Commercial Renewables segment.

[5] Amounts in Retained Earnings and AOCI primarily represent impacts to accumulated other comprehensive income due to implementation of a new accounting standard related to Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.

[6] Amounts in Retained Earnings and AOCI primarily represent impacts to accumulated other comprehensive income due to implementation of a new accounting standard related to Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income.

[7] Amounts in Retained earnings primarily represent impacts due to implementation of a new accounting standard related to Current Estimated Credit Losses. See Note 1 for additional discussion.

[8] Amounts primarily represent impacts due to implementation of a new accounting standard related to Credit Losses. See Note 1 for additional discussion.

[9] Relates to the sale of a noncontrolling interest in Duke Energy Indiana. See Note 1 for additional discussion