Commitments and Contingencies (Table)

6 Months Ended

Jun. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Accrual For Environmental Loss Contingencies

The following table contains information regarding reserves for probable and estimable costs related to the various environmental sites. These reserves are recorded in Other within Deferred Credits and Other Liabilities on the Condensed Consolidated Balance Sheets.

	Six Months Ended June 30, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Balance at beginning of period	$	79		$	11		$	27		$	8		$	19		$	27		$	7
Provisions / adjustments	9			(1		)	4			3			1			5			—
Cash reductions	(6		)	—			(4		)	(2		)	(2		)	(1		)	—
Balance at end of period	$	82		$	10		$	27		$	9		$	18		$	31		$	7

	Six Months Ended June 30, 2013
(in millions)	Duke Energy			Duke Energy Carolinas		Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Balance at beginning of period	$	75		$	12	$	33		$	14		$	19		$	15		$	8
Provisions / adjustments	4			—		4			1			3			(1		)	1
Cash reductions	(12		)	—		(3		)	(1		)	(2		)	(6		)	(2		)
Balance at end of period	$	67		$	12	$	34		$	14		$	20		$	8		$	7

Schedule of Additional Possible Losses in Excess of Recorded Environmental Reserves

Additional losses in excess of recorded reserves that could be incurred for the stages of investigation, remediation, and monitoring for environmental sites that have been evaluated at this time are presented in the table below.

(in millions)
Duke Energy	$	90
Duke Energy Carolinas	25
Progress Energy	9
Duke Energy Progress	2
Duke Energy Florida	7
Duke Energy Ohio	51
Duke Energy Indiana	5

Estimated Costs of Potential Approaches To Coal Ash Management [Table Text Block]

On April 22, 2014, a representative of Duke Energy appeared before the Environmental Review Commission of the North Carolina General Assembly and outlined cost estimates for a range of ash handling and ash basin closure options. The table below summarizes estimated costs of various potential approaches to ash management for North Carolina ash basins. These amounts represent a rough order of magnitude and are not detailed engineering grade estimates. The estimates assume coal ash will retain a non-hazardous designation by the EPA and exclude financing costs. Any ultimate activities and resultant costs will be dependent upon state and federal environmental requirements.

(in billions)	Range
Baseline assumptions(a)	$	2.0	-	$	2.5
Estimated additional costs related to full excavation(b)	4.0		-	5.5
Estimated additional costs related to all-dry systems(c)	1.0		-	2.0
Total range of costs(d)	$	2.0	-	$	10.0

(a) Assumes (i) hybrid cap in place closure for ash basins at ten coal plants, (ii) excavation and relocation of ash to lined structural fills or landfills for the retired Dan River, Riverbend and Sutton coal plants, (iii) dry fly ash conversion at the Asheville units and Cliffside Unit 5, (iv) continued structural fill disposal for the Asheville coal plant, and (v) dry bottom ash handling conversions and fly ash reliability improvements. Includes costs for actions noted in the March 12, 2014 letter to the governor of North Carolina and existing plans to close ash basins.

(b) Represents estimated additional costs to excavate and relocate ash to lined landfills for the ten plants under hybrid cap in place closure in the baseline assumptions.

(c) Represents estimated additional costs to convert all active coal plants to all-dry pneumatic bottom ash handling systems and thermally-driven evaporation of other process water.

(d) On average, the allocation of these estimates is approximately 65 percent to Duke Energy Carolinas and 35 percent to Duke Energy Progress. However, this allocation could vary significantly based on site-specific compliance actions.

Schedule of Litigation Reserves and Related Insurance Recoveries

The Duke Energy Registrants are involved in other legal, tax and regulatory proceedings arising in the ordinary course of business, some of which involve significant amounts. The Duke Energy Registrants believe the final disposition of these proceedings will not have a material effect on their results of operations, cash flows or financial position. The table below presents recorded reserves based on management’s best estimate of probable loss for legal matters discussed above, excluding asbestos related reserves. Reserves are classified on the Condensed Consolidated Balance Sheets in Other within Deferred Credits and Other Liabilities and Other within Current Liabilities. The reasonably possible range of loss for all non-asbestos related matters in excess of recorded reserves is not material.

(in millions)	June 30, 2014		December 31, 2013
Reserves for Legal Matters
Duke Energy	$	197	$	204
Progress Energy	73		78
Duke Energy Progress	10		10
Duke Energy Florida	42		43