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Environmental Matters (Tables)
6 Months Ended
Jun. 30, 2012
Enviromental Matters Disclosure [Line Items]  
Environmental remediation accruals [Tables]
PROGRESS ENERGY        
(in millions)MGP and Other Sites Remediation of Distribution and Substation Transformers Total
Balance, December 31, 2011$ 17 $ 6 $ 23
Amount accrued for environmental loss contingencies(a)  15   2   17
Expenditures for environmental loss contingencies(b)  (2)   (4)   (6)
Balance, June 30, 2012(c)$ 30 $ 4 $ 34
          
Balance, December 31, 2010$ 20 $ 15 $ 35
Amount accrued for environmental loss contingencies(a)  -   3   3
Expenditures for environmental loss contingencies(b)  (2)   (9)   (11)
Balance, June 30, 2011(c)$ 18 $ 9 $ 27
          
(a) Amounts accrued are for the six months ended June 30, 2012 and 2011. For the three months ended June 30, 2012, our accruals were $12 million for the remediation of MGP and other sites and were not material for the remediation of distribution and substations transformers. For the three months ended June 30, 2011, our accruals for environmental loss contingencies were not material.
(b) Expenditures are for the six months ended June 30, 2012 and 2011. For the three months ended June 30, 2012 and 2011, our expenditures for environmental loss contingencies were not material.
(c) Expected to be paid out over one to 12 years.
          
PEC
 
Enviromental Matters Disclosure [Line Items]  
Environmental remediation accruals [Tables]
PEC        
(in millions)      MGP and Other Sites
Balance, December 31, 2011      $ 11
Amount accrued for environmental loss contingencies(a)        4
Expenditures for environmental loss contingencies(b)        (1)
Balance, June 30, 2012(c)      $ 14
          
Balance, December 31, 2010      $ 12
Amount accrued for environmental loss contingencies(a)        -
Expenditures for environmental loss contingencies(b)        -
Balance, June 30, 2011(c)      $ 12
          
(a) Amounts accrued are for the six months ended June 30, 2012 and 2011. For the three months ended June 30, 2012, PEC's accruals were $5 million for the remediation of MGP and other sites. For the three months ended June 30, 2011, PEC's accruals for the remediation of MGP and other sites were not material.
(b) Expenditures are for the six months ended June 30, 2012 and 2011. For the three months ended June 30, 2012 and 2011, PEC's expenditures for the remediation of MGP and other sites were not material.
(c) Expected to be paid out over one to ten years.        
          
PEF
 
Enviromental Matters Disclosure [Line Items]  
Environmental remediation accruals [Tables]
PEF        
(in millions)MGP and Other Sites Remediation of Distribution and Substation Transformers Total
Balance, December 31, 2011$ 6 $ 6 $ 12
Amount accrued for environmental loss contingencies(a)  11   2   13
Expenditures for environmental loss contingencies(b)  (1)   (4)   (5)
Balance, June 30, 2012(c)$ 16 $ 4 $ 20
          
Balance, December 31, 2010$ 8 $ 15 $ 23
Amount accrued for environmental loss contingencies(a)  -   3   3
Expenditures for environmental loss contingencies(b)  (2)   (9)   (11)
Balance, June 30, 2011(c)$ 6 $ 9 $ 15
          
(a) Amounts accrued are for the six months ended June 30, 2012 and 2011. For the three months ended June 30, 2012, PEF's accruals were $7 million for the remediation of MGP and other sites and were not material for the remediation of distribution and substation transformers. For the three months ended June 30, 2011, PEF's accruals for environmental loss contingencies were not material.
(b) Expenditures are for the six months ended June 30, 2012 and 2011. For the three months ended June 30, 2012 and 2011, PEF's expenditures for environmental loss contingencies were not material.
(c) Expected to be paid out over one to 12 years.