Commitments and Contingencies (Table)

6 Months Ended

Jun. 30, 2015

Valuation and Qualifying Accounts Disclosure [Line Items]

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	$	89
Duke Energy Carolinas	25
Progress Energy	15
Duke Energy Progress	1
Duke Energy Florida	14
Duke Energy Ohio	42
Duke Energy Indiana	7

Schedule of Loss Contingencies

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 Accounts payable 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, 2015		December 31, 2014
Reserves for Legal Matters
Duke Energy	$	191	$	323
Duke Energy Carolinas	19		72
Progress Energy	79		93
Duke Energy Progress	22		37
Duke Energy Florida	36		36
Duke Energy Ohio	81		—

Reserve for Environmental Costs [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Schedule of Loss Contingencies

The following tables contain 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, 2015
(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	$	97		$	10	$	17		$	5		$	12		$	54		$	10
Provisions/adjustments	5			—		2			—			2			1			3
Cash reductions	(4		)	—		(2		)	(1		)	(1		)	(1		)	(1		)
Balance at end of period	$	98		$	10	$	17		$	4		$	13		$	54		$	12

	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