Consolidated Statements of Equity (USD $) In Millions, except Share data, unless otherwise specified		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] Common Stock [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] 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] Retained Earnings [Member]	Duke Energy Progress [Member] Net Gains (Losses) on Cash Flow Hedges [Member]	Duke Energy Florida [Member]	Duke Energy Florida [Member] Common Stock [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]
Beginning Member's Equity at Dec. 31, 2010													$ 8,916	$ 8,938	$ (20)	$ (2)
Balance at Dec. 31, 2010		22,653		1	21,023	1,496	97	(18)	(17)	(60)	22,522	131					10,027	7,332	11	2,805	(63)	(62)	10,023		4	5,180	2,130	3,083	(33)	4,890	1,750	3,144	(4)	5,464	762	5,570	(846)	(22)	3,567	1	1,358	2,200	8
Balance (in shares) at Dec. 31, 2010		443,000,000
Net income		1,714				1,706					1,706	8	834	834			582									516		516		314		314		194			194		168			168
Net income																	578			575			575	[1]	3
Net income (loss) available to common stockholders																										513				312
Other comprehensive income (loss), net of tax		(243)					(142)	(53)	8	(49)	(236)	(7)	3		3	0	(40)				(79)	39	(40)			(38)			(38)	(23)			(23)	(6)				(6)	(1)				(1)
Common stock issuances, including dividend reinvestment and employee benefits (in shares)		2,000,000
Common stock issuances, including dividend reinvestment and employee benefits		109		0	109						109						91	86	5				91
Stock-based compensation expense																										18	18			7	7
Common stock dividends		(1,329)				(1,329)					(1,329)						(628)			(628)			(628)
Dividends to parent													(299)	(299)												(585)		(585)		(510)		(510)		(485)		(485)
Preferred stock dividends at stated rates																										(3)		(3)		(2)		(2)
Changes in noncontrolling interest in subsidiaries	[2]	(39)										(39)
Distributions to noncontrolling interests		26															(3)								(3)
Tax dividend																														(1)		(1)
Total Member's Equity													9,454	9,473	(17)	(2)
Notes To Reconciliation Of Total Equity [Details]
Net income attributable to preferred shareholders																	4
Balance at Dec. 31, 2011		22,865		1	21,132	1,873	(45)	(71)	(9)	(109)	22,772	93					10,025	7,418	16	2,752	(142)	(23)	10,021		4	5,088	2,148	3,011	(71)	4,675	1,757	2,945	(27)	5,167	762	5,085	(652)	(28)	3,734	1		2,368	7
Balance (in shares) at Dec. 31, 2011		445,000,000
Beginning Member's Equity at Dec. 31, 2011													9,454
Net income		299											266				152									52				128				74					(167)
Balance at Mar. 31, 2012
Beginning Member's Equity at Dec. 31, 2011													9,454	9,473	(17)	(2)
Balance at Dec. 31, 2011		22,865			21,132	1,873	(45)	(71)	(9)	(109)	22,772	93					10,025	7,418	16	2,752	(142)	(23)	10,021		4	5,088	2,148	3,011	(71)	4,675	1,757	2,945	(27)	5,167	762	5,085	(652)	(28)	3,734	1	1,358	2,368	7
Balance (in shares) at Dec. 31, 2011		445,000,000
Net income		1,782				1,768					1,768	12	865	865			407									272		272		266		266		175			175		(50)			(50)
Net income																	403			400			400	[1]	3
Net income (loss) available to common stockholders		1,780	[3]																							269				264
Other comprehensive income (loss), net of tax		(76)					(71)	(29)	9	19	(72)	(4)	3		2	1	98				100	(2)	98			71			71	27			27	27				27	(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		76			76						76						31	18	13				31
Common stock issued in connection with the Progress Energy Merger (in shares)		258,000,000
Common stock issued in connection with the Progress Energy Merger		18,071			18,071						18,071
Stock-based compensation expense																										11	11			5	5
Common stock dividends		(1,752)				(1,752)					(1,752)						(369)			(369)			(369)
Dividends to parent													(450)	(450)												(310)		(310)		(170)		(170)		(175)		(175)
Preferred stock dividends at stated rates																										(3)		(3)		(2)		(2)
Changes in noncontrolling interest in subsidiaries	[2]	(17)										(17)
Transfer of Vermillion Generating Station																																		(28)		(28)			26		26
Deconsolidation of DS Cornerstone, LLC	[4]	(82)										(82)
Contribution from noncontrolling interest in DS Cornerstone, LLC	[4]	76										76
Distributions to noncontrolling interests		23															(2)								(2)
Contributions from noncontrolling Interests		76
Recapitalization for merger with Duke Energy																		(7,436)	7,436
Tax dividend																										(2)		(2)		(2)		(2)
Other																	(1)								(1)
Total Member's Equity													9,872	9,888	(15)	(1)
Notes To Reconciliation Of Total Equity [Details]
Net income attributable to preferred shareholders		(2)															4
Balance at Dec. 31, 2012		40,941		1	39,279	1,889	(116)	(100)	0	(90)	40,863	78					10,185	0	7,465	2,783	(42)	(25)	10,181		4	5,127	2,159	2,968	0	4,799	1,762	3,037	0	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															100									160,000,000				100				89,663,086					59,913,701
Beginning Member's Equity at Sep. 30, 2012
Net income		437											130				34									93				(45)				42					59
Total Member's Equity													9,872
Balance at Dec. 31, 2012		40,941		1													10,185									5,127				4,799				5,166	762				3,708	1
Balance (in shares) at Dec. 31, 2012		704,000,000															100									160,000,000				100				89,663,086					59,913,701
Beginning Member's Equity at Dec. 31, 2012													9,872
Net income		634											244				154									110				110				(21)					90
Balance at Mar. 31, 2013
Beginning Member's Equity at Dec. 31, 2012													9,872	9,888	(15)	(1)
Balance at Dec. 31, 2012		40,941		1	39,279	1,889	(116)	(100)	0	(90)	40,863	78					10,185		7,465	2,783	(42)	(25)	10,181		4	5,127		2,968		4,799		3,037	0	5,166	762		(477)	(1)	3,708	1		2,318	5
Balance (in shares) at Dec. 31, 2012		704,000,000															100									160,000,000				100				89,663,086					59,913,701
Net income		2,676				2,665					2,665	11	976	976			675									500		500		325		325		102			102		358			358
Net income																	675			672			672		3
Net income (loss) available to common stockholders																										500				325
Other comprehensive income (loss), net of tax		(99)					(191)	60	0	38	(93)	(6)	1		1	0	8				(1)	9	8			0				(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)
Dividends to parent													(499)	(499)												0				(325)		(325)							(125)			(125)
Preferred stock dividends at stated rates																														0		0
Premium on the redemption of preferred stock of subsidiaries		(3)				(3)					(3)						(3)			(3)			(3)			(2)		(2)		(1)		(1)
Changes in noncontrolling interest in subsidiaries	[2]	(14)										(14)
Distributions to noncontrolling interests		15															(3)								(3)
Contributions from noncontrolling Interests		9										9
Other additional paid in capital adjustments																	2		2				2
Total Member's Equity													10,350	10,365	(14)	(1)
Notes To Reconciliation Of Total Equity [Details]
Net income attributable to preferred shareholders		0															0
Balance at Dec. 31, 2013		41,408		1	39,365	2,363	(307)	(40)	0	(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															100									160,000,000				100				89,663,086					59,913,701
Beginning Member's Equity at Sep. 30, 2013
Net income		692											209				196									138				75				6					82
Total Member's Equity													10,350
Balance at Dec. 31, 2013		$ 41,408		$ 1													$ 10,864									$ 5,625	$ 2,159			$ 4,797	$ 1,762			$ 5,269	$ 762	$ 4,882			$ 3,939	$ 1	$ 1,384
Balance (in shares) at Dec. 31, 2013		706,000,000															100									160,000,000				100				89,663,086					59,913,701

[1] For the year ended December 31, 2012, consolidated net income of $407 million included $4 million attributable to preferred shareholders of subsidiaries. For the year ended December 31, 2011, consolidated net income of $582 million included $4 million attributable to preferred shareholders of subsidiaries. Income attributable to preferred shareholders of subsidiaries is not a component of total equity and is excluded from the table above.

[2] Includes $15 million, $23 million and $26 million in cash distributions to noncontrolling interests in 2013, 2012 and 2011, respectively.

[3] For the year ended December 31, 2012, consolidated net income of $1,782 million includes $2 million attributable to preferred shareholders of subsidiaries. Income attributable to preferred shareholders of subsidiaries is not a component of total equity and is excluded from the table above.

[4] Refer to Note 2 for further information on the deconsolidation of DS Cornerstone, LLC.