Commitments and Contingencies (Table)

9 Months Ended

Sep. 30, 2014

Valuation and Qualifying Accounts Disclosure [Line Items]

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 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)	September 30, 2014		December 31, 2013
Reserves for Legal Matters
Duke Energy	$	227	$	204
Progress Energy	70		78
Duke Energy Progress	9		10
Duke Energy Florida	41		43

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	$	83
Duke Energy Carolinas	25
Progress Energy	9
Duke Energy Progress	2
Duke Energy Florida	7
Duke Energy Ohio	42
Duke Energy Indiana	7

Reserve for Environmental Costs [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Schedule of 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.

	Nine Months Ended September 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	34			(1		)	4			3			1			28			3
Cash reductions	(8		)	—			(6		)	(4		)	(2		)	(1		)	(1		)
Balance at end of period	$	105		$	10		$	25		$	7		$	18		$	54		$	9

	Nine Months Ended September 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	6			—		5			1			4			(1		)	1
Cash reductions	(17		)	—		(6		)	(2		)	(4		)	(8		)	(2		)
Balance at end of period	$	64		$	12	$	32		$	13		$	19		$	6		$	7