Consolidated Statements of Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Foreign Currency Adjustments [Member]		Net Gains (Losses) on Cash Flow Hedges [Member]	Net Gains (Losses) on Available for Sale Securities [Member]	Pension And OPEB Related Adjustments To AOCI [Member]	Common Stockholders' Equity [Member]	Noncontrolling Interest [Member]		Duke Energy Carolinas [Member]	Duke Energy Carolinas [Member] Members Equity [Member]	Duke Energy Carolinas [Member] Net Gains (Losses) on Cash Flow Hedges [Member]	Duke Energy Carolinas [Member] Net Gains (Losses) on Available for Sale Securities [Member]	Progress Energy [Member]	Progress Energy [Member] Additional Paid In Capital [Member]	Progress Energy [Member] Retained Earnings [Member]	Progress Energy [Member] Net Gains (Losses) on Cash Flow Hedges [Member]	Progress Energy [Member] Net Gains (Losses) on Available for Sale Securities [Member]	Progress Energy [Member] Pension And OPEB Related Adjustments To AOCI [Member]	Progress Energy [Member] Common Stockholders' Equity [Member]	Progress Energy [Member] Noncontrolling Interest [Member]	Duke Energy Progress [Member]	Duke Energy Progress [Member] Common Stock [Member]	Duke Energy Progress [Member] Members Equity [Member]	Duke Energy Progress [Member] Retained Earnings [Member]	Duke Energy Florida [Member]	Duke Energy Florida [Member] Common Stock [Member]	Duke Energy Florida [Member] Members Equity [Member]	Duke Energy Florida [Member] Retained Earnings [Member]	Duke Energy Florida [Member] Net Gains (Losses) on Cash Flow Hedges [Member]	Duke Energy Florida [Member] Net Gains (Losses) on Available for Sale Securities [Member]	Duke Energy Ohio [Member]	Duke Energy Ohio [Member] Common Stock [Member]	Duke Energy Ohio [Member] Additional Paid In Capital [Member]	Duke Energy Ohio [Member] Retained Earnings [Member]	Duke Energy Indiana [Member]	Duke Energy Indiana [Member] Common Stock [Member]	Duke Energy Indiana [Member] Additional Paid In Capital [Member]	Duke Energy Indiana [Member] Members Equity [Member]	Duke Energy Indiana [Member] Retained Earnings [Member]	Duke Energy Indiana [Member] Net Gains (Losses) on Cash Flow Hedges [Member]
Balance (in shares) at Dec. 31, 2013		706,000,000
Balance at Dec. 31, 2013	$ 41,408	$ 1	$ 39,365	$ 2,363	$ (307)		$ (40)		$ (52)	$ 41,330	$ 78						$ 10,864	$ 7,467	$ 3,452	$ (43)		$ (16)	$ 10,860	$ 4	$ 5,625	$ 2,159		$ 3,466	$ 4,797	$ 1,762		$ 3,036	$ (1)		$ 5,269	$ 762	$ 4,882	$ (375)	$ 3,939	$ 1	$ 1,384		$ 2,551	$ 3
Beginning member's equity at Dec. 31, 2013													$ 10,350	$ 10,365	$ (14)	$ (1)
Net Income (Loss)	1,889			1,883						1,883	6						874		869				869	5
Net Income (Loss) Attributable to Parent	1,883												1,072	1,072			869								467			467	548			548			(495)			(495)	359				359
Other comprehensive income (loss), net of tax	(136)				(132)		(19)	$ 3	4	(144)	8		2		2		18			8	$ 1	9	18						1				$ 1
Distribution to Parent													(500)	(500)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		1,000,000
Common stock issuances, including dividend reinvestment and employee benefits	40		40							40
Common stock dividends	(2,234)			(2,234)						(2,234)															(225)			(225)	(124)			(124)			(100)		(100)		(450)				(450)
Distributions to noncontrolling interest in subsidiaries	(65)										(65)						(37)							(37)
Transfer of service company net assets to Duke Energy																	(539)		(539)				(539)
Other	(3)										(3)						(4)							(4)
Balance (in shares) at Dec. 31, 2014		707,000,000
Balance at Dec. 31, 2014	40,899	$ 1	39,405	2,012	(439)		(59)	3	(48)	40,875	24						11,176	7,467	3,782	(35)	1	(7)	11,208	(32)	5,867	2,159		3,708	5,222	1,762		3,460			4,674	762	4,782	(870)	3,848	1	1,384		2,460	3
Ending member's equity at Dec. 31, 2014													10,924	10,937	(12)	(1)
Net Income (Loss)	2,831			2,816						2,816	15						1,062		1,051				1,051	11
Net Income (Loss) Attributable to Parent	2,816												1,081	1,081			1,051								566		$ 211	355	599		$ 248	351			172			172	316				316
Other comprehensive income (loss), net of tax	(274)				(253)		9	(6)	(13)	(263)	(11)		2		1	1	(7)			4	(1)	(10)	(7)						0										(2)					(2)
Distribution to Parent													(401)	(401)															(350)		(350)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		1,000,000
Common stock issuances, including dividend reinvestment and employee benefits	$ 63		63							63
Stock repurchase, shares	19,800,000	(20,000,000)
Stock repurchase	$ (1,500)		(1,500)							(1,500)
Common stock dividends	(2,254)			(2,254)						(2,254)																			(350)			(350)			(150)		(150)		$ (326)				(326)
Distributions to noncontrolling interest in subsidiaries	(9)										(9)						(4)							(4)
Capital contribution from parent																	625	625					625		626		626
Distribution of membership interest of Duke Energy SAM, LLC to parent																																			$ (1,912)		(1,912)
Other	$ 15			(10)						(10)	25	[1]					$ 1		(2)				(2)	3		$ (2,159)	6,222	$ (4,063)		$ (1,762)	5,223	$ (3,461)
Balance (in shares) at Dec. 31, 2015	688,000,000	688,000,000															100,000,000																		89,663,086				53,913,701
Balance at Dec. 31, 2015	$ 39,771	$ 1	37,968	2,564	(692)		(50)	(3)	(61)	39,727	44						$ 12,853	8,092	4,831	(31)	0	(17)	12,875	(22)											$ 2,784	762	2,720	(698)	$ 3,836	1	1,384		2,450	1
Ending member's equity at Dec. 31, 2015													11,606	11,617	(11)	0									7,059		7,059		5,121		5,121
Net Income (Loss)	2,170			2,152						2,152	18						1,041		1,031				1,031	10
Net Income (Loss) Attributable to Parent	2,152												1,166	1,166			1,031								599		599		551		551				228			228	381			$ 381
Other comprehensive income (loss), net of tax	715				$ 692	[2]	30	2	(11)	713	2		2		2	$ 0	10			8	1	1	10						1					$ 1					(1)			0		$ (1)
Distribution to Parent													(2,000)	(2,000)											(300)		(300)		(775)		(775)								$ (149)			(149)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		12,000,000
Common stock issuances, including dividend reinvestment and employee benefits	773		773							773
Common stock dividends	(2,332)			(2,332)						(2,332)							(2,098)		(2,098)				(2,098)												(25)		(25)
Distributions to noncontrolling interest in subsidiaries	(6)										(6)						(1)							(1)
Capital contribution from parent																																			$ 9			9
Other	$ (50)										(50)	[3]	(2)	(2)			$ 2	2	0				2	0					2		2									$ (1)	$ (1,384)	3,835	$ (2,450)
Balance (in shares) at Dec. 31, 2016	700,000,000	700,000,000															100,000,000																		89,663,086				53,913,701
Balance at Dec. 31, 2016	$ 41,041	$ 1	$ 38,741	$ 2,384			$ (20)	$ (1)	$ (72)	$ 41,033	$ 8						$ 11,807	$ 8,094	$ 3,764	$ (23)	$ 1	$ (16)	$ 11,820	$ (13)										$ 1	$ 2,996	$ 762	$ 2,695	$ (461)
Ending member's equity at Dec. 31, 2016													$ 10,772	$ 10,781	$ (9)										$ 7,358		$ 7,358		$ 4,900		$ 4,899								$ 4,067			$ 4,067

[1] Noncontrolling Interests amount is primarily related to the acquisitions of a majority interest in a provider of energy management systems and services for commercial customers and a solar company.

[2] Foreign Currency Translation Adjustments amount includes $620 million of cumulative adjustment realized as a result of the sale of the Latin American generation business. Refer to Note 2 to the Consolidated Financial Statements.

[3] Noncontrolling Interests amount is primarily related to the sale of the Latin American generation business. Refer to Note 2 to the Consolidated Financial Statements.