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Commitments and Contingencies (Table)
3 Months Ended
Mar. 31, 2016
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 not material except as presented in the table below.
(in millions)
 
Duke Energy
$
83

Duke Energy Carolinas
22

Duke Energy Ohio
42

Duke Energy Indiana
15

Schedule of Loss Contingencies
The table below presents recorded reserves based on management’s best estimate of probable loss for legal matters, excluding asbestos related reserves and the exit obligation discussed above related to the termination of an EPC contract. 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 in excess of recorded reserves is not material, other than as described above.
(in millions)
March 31, 2016

 
December 31, 2015

Reserves for Legal Matters
 
 
 
Duke Energy
$
181

 
$
166

Duke Energy Carolinas
11

 
11

Progress Energy
54

 
54

Duke Energy Progress
6

 
6

Duke Energy Florida
31

 
31

Duke Energy Ohio
80

 
80

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.
 
Three Months Ended March 31, 2016
 
 
 
Duke

 
 
 
Duke

 
Duke

 
Duke

 
Duke

 
Duke

 
Energy

 
Progress

 
Energy

 
Energy

 
Energy

 
Energy

(in millions)
Energy

 
Carolinas

 
Energy

 
Progress

 
Florida

 
Ohio

 
Indiana

Balance at beginning of period
$
97

 
$
10

 
$
17

 
$
3

 
$
14

 
$
54

 
$
12

Provisions/adjustments
10

 
2

 
1

 

 
1

 

 
6

Cash reductions
(3
)
 
(1
)
 
(2
)
 
(1
)
 
(1
)
 

 

Balance at end of period
$
104

 
$
11

 
$
16

 
$
2

 
$
14

 
$
54

 
$
18

 
Three Months Ended March 31, 2015
 
 
 
Duke

 
 
 
Duke

 
Duke

 
Duke

 
Duke

 
Duke

 
Energy

 
Progress

 
Energy

 
Energy

 
Energy

 
Energy

(in millions)
Energy

 
Carolinas

 
Energy

 
Progress

 
Florida

 
Ohio

 
Indiana

Balance at beginning of period
$
97

 
$
10

 
$
17

 
$
5

 
$
12

 
$
54

 
$
10

Provisions/adjustments
2

 

 

 

 

 
1

 
2

Cash reductions
(3
)
 

 

 

 

 
(1
)
 
(1
)
Balance at end of period
$
96

 
$
10

 
$
17

 
$
5

 
$
12

 
$
54

 
$
11