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 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 Ohio [Member] Pension And OPEB Related Adjustments To AOCI [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] Retained Earnings [Member]	Duke Energy Indiana [Member] Net Gains (Losses) on Cash Flow Hedges [Member]
Balance at Dec. 31, 2012	$ 40,941	$ 1	$ 39,279	$ 1,889	$ (116)	$ (100)		$ (90)	$ 40,863	$ 78						$ 10,185	$ 7,465	$ 2,783	$ (42)		$ (25)	$ 10,181	$ 4	$ 5,127	$ 2,159		$ 2,968	$ 4,799	$ 1,762		$ 3,037		$ 5,166	$ 762	$ 4,882	$ (477)	$ (1)	$ 3,708	$ 1	$ 1,384	$ 2,318	$ 5
Balance (in shares) at Dec. 31, 2012		704,000,000
Beginning member's equity at Dec. 31, 2012												$ 9,872	$ 9,888	$ (15)	$ (1)
Net income	2,676			2,665					2,665	11						675		672				672	3	500				325					102
Net Income (Loss) Attributable to Parent	2,665											976	976			672								500			500	325			325		102			102		358			358
Other comprehensive income (loss), net of tax	(99)				(191)	60		38	(93)	(6)		1		1		8			(1)		9	8						(1)				$ (1)	1				$ 1	(2)				(2)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		2,000,000
Common stock issuances, including dividend reinvestment and employee benefits	86		86						86
Common stock dividends	(2,188)			(2,188)					(2,188)																			(325)			(325)							(125)			(125)
Premium on the redemption of preferred stock of subsidiaries	(3)			(3)					(3)							(3)		(3)				(3)		(2)			(2)	(1)			(1)
Contributions from noncontrolling Interests	9									9
Distributions to noncontrolling interest in subsidiaries	(14)									(14)						(3)							(3)
Distribution to parent												(499)	(499)
Other																2	2					2
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
Balance (in shares) at Dec. 31, 2013		706,000,000
Ending member's equity at Dec. 31, 2013												10,350	10,365	(14)	(1)
Net income	1,889			1,883					1,883	6		1,072				874		869				869	5	467				548					(495)					359
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
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)	[1]					(37)							(37)
Transfer of service company net assets to Duke Energy																(539)		(539)				(539)
Distribution to parent												(500)	(500)
Other	(3)									(3)						(4)							(4)
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
Balance (in shares) at Dec. 31, 2014	707,000,000	707,000,000														100								160,000,000				100					89,663,086					53,913,701
Ending member's equity at Dec. 31, 2014												10,924	10,937	(12)	(1)
Net income	$ 2,831			2,816					2,816	15		1,081				$ 1,062		1,051				1,051	11	$ 566				$ 599					$ 172					$ 316
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)																(2)				(2)
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 to parent												(401)	(401)															(350)		(350)
Distribution of membership interest of Duke Energy SAM, LLC to parent																																	(1,912)		(1,912)
Other	15			(10)					(10)	25	[2]					1		(2)				(2)	3		$ (2,159)	6,222	$ (4,063)		$ (1,762)	5,223	$ (3,461)
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)		$ (17)	$ 12,875	$ (22)	$ 7,059				5,121					$ 2,784	$ 762	$ 2,720	$ (698)		$ 3,836	$ 1	$ 1,384	$ 2,450	$ 1
Balance (in shares) at Dec. 31, 2015	688,000,000	688,000,000														100																	89,663,086					53,913,701
Ending member's equity at Dec. 31, 2015												$ 11,606	$ 11,617	$ (11)										$ 7,059		$ 7,059		$ 5,121		$ 5,121

[1] This decrease primarily relates to cash distributions to noncontrolling interests.

[2] The $25 million change in Noncontrolling Interests 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.