Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2013

Asset Retirement Obligation [Line Items]

Schedule of Asset Retirement Obligations

(in millions)		Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Balance at December 31, 2011		$	1,936	$	1,846	$	1,265	$	896	$	369	$	27	$	43
Acquisitions(a)			3,062		—		—		—		—		—		—
Accretion expense(b)			173		118		86		64		22		1		1
Liabilities settled			(15)		(3)		(2)		(2)		—		—		(10)
Revisions in estimates of cash flows(c)			(4)		(2)		234		—		234		—		(1)
Liabilities incurred in the current year(d)			24		—		837		698		139		—		4
Balance at December 31, 2012(e)			5,176		1,959		2,420		1,656		764		28		37
Acquisitions			4		—		—		—		—		—		—
Accretion expense(b)			239		122		113		80		33		2		—
Liabilities settled			(12)		—		(12)		—		(12)		—		—
Revisions in estimates of cash flows(f)			(449)		(487)		49		1		48		(2)		(7)
Balance at December 31, 2013(e)		$	4,958	$	1,594	$	2,570	$	1,737	$	833	$	28	$	30
(a)	Represents asset retirement obligations resulting from the merger with Progress Energy. See Note 2 for additional information.
(b)	Substantially all accretion expense for the years ended December 31, 2013 and 2012 relates to Duke Energy’s regulated electric operations and has been deferred in accordance with regulatory accounting treatment.
(c)	For Progress Energy and Duke Energy Florida, the amounts relate to the retirement of Crystal River Unit 3.
(d)	For Progress Energy, Duke Energy Progress and Duke Energy Florida, amounts primarily relate to spent nuclear fuel disposal recorded in the third quarter of 2012 to conform to Duke Energy's assumptions for nuclear asset retirement obligations.
(e)	Balances at December 31, 2013 and 2012, include $8 million and $7 million, respectively, reported in Other current liabilities on the Consolidated Balance Sheets at Duke Energy, Progress Energy and Duke Energy Progress.
(f)	Amounts for Duke Energy, Duke Energy Carolinas and Duke Energy Florida primarily relate to the site-specific nuclear decommissioning cost studies completed in 2013.

Duke Energy Carolinas [Member]

Asset Retirement Obligation [Line Items]

Summary of Nuclear Decommissioning Trust Fund Requirements

(in millions)		Annual Funding Requirement		Decommissioning Costs(a)(b)		Year of Cost Study
Duke Energy Carolinas		$	21	$	3,420	2013
Duke Energy Progress			14		3,000	2009
Duke Energy Florida			―		1,083	2013
(a)	Represents cost per the most recent site-specific nuclear decommissioning cost studies, including costs to decommission plant components not subject to radioactive contamination.
(b)	Includes the Duke Energy Registrants' ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors.

Schedule of Nuclear Operating Licenses Expiration

Unit		Year of Expiration
Duke Energy Carolinas
Catawba Unit 1		2043
Catawba Unit 2		2043
McGuire Unit 1		2041
McGuire Unit 2		2043
Oconee Unit 1		2033
Oconee Unit 2		2033
Oconee Unit 3		2034
Duke Energy Progress
Brunswick Unit 1		2036
Brunswick Unit 2		2034
Harris		2046
Robinson		2030
Duke Energy Florida
Crystal River Unit 3(a)		2016
(a)	Duke Energy Florida has requested the NRC terminate the Crystal River Unit 3 operating license as a result of the retirement of the unit.

Duke Energy Progress [Member]

Asset Retirement Obligation [Line Items]

Summary of Nuclear Decommissioning Trust Fund Requirements

(in millions)		Annual Funding Requirement		Decommissioning Costs(a)(b)		Year of Cost Study
Duke Energy Carolinas		$	21	$	3,420	2013
Duke Energy Progress			14		3,000	2009
Duke Energy Florida			―		1,083	2013
(a)	Represents cost per the most recent site-specific nuclear decommissioning cost studies, including costs to decommission plant components not subject to radioactive contamination.
(b)	Includes the Duke Energy Registrants' ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors.

Schedule of Nuclear Operating Licenses Expiration

Unit		Year of Expiration
Duke Energy Carolinas
Catawba Unit 1		2043
Catawba Unit 2		2043
McGuire Unit 1		2041
McGuire Unit 2		2043
Oconee Unit 1		2033
Oconee Unit 2		2033
Oconee Unit 3		2034
Duke Energy Progress
Brunswick Unit 1		2036
Brunswick Unit 2		2034
Harris		2046
Robinson		2030
Duke Energy Florida
Crystal River Unit 3(a)		2016
(a)	Duke Energy Florida has requested the NRC terminate the Crystal River Unit 3 operating license as a result of the retirement of the unit.

Duke Energy Florida [Member]

Asset Retirement Obligation [Line Items]

Summary of Nuclear Decommissioning Trust Fund Requirements

(in millions)		Annual Funding Requirement		Decommissioning Costs(a)(b)		Year of Cost Study
Duke Energy Carolinas		$	21	$	3,420	2013
Duke Energy Progress			14		3,000	2009
Duke Energy Florida			―		1,083	2013
(a)	Represents cost per the most recent site-specific nuclear decommissioning cost studies, including costs to decommission plant components not subject to radioactive contamination.
(b)	Includes the Duke Energy Registrants' ownership interest in jointly owned reactors. Other joint owners are responsible for decommissioning costs related to their interest in the reactors.

Schedule of Nuclear Operating Licenses Expiration

Unit		Year of Expiration
Duke Energy Carolinas
Catawba Unit 1		2043
Catawba Unit 2		2043
McGuire Unit 1		2041
McGuire Unit 2		2043
Oconee Unit 1		2033
Oconee Unit 2		2033
Oconee Unit 3		2034
Duke Energy Progress
Brunswick Unit 1		2036
Brunswick Unit 2		2034
Harris		2046
Robinson		2030
Duke Energy Florida
Crystal River Unit 3(a)		2016
(a)	Duke Energy Florida has requested the NRC terminate the Crystal River Unit 3 operating license as a result of the retirement of the unit.