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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2012
Commitments and Contingencies  
Schedule of updated contractual obligations related to entity's renewable energy credits

As of September 30, 2012, the updated contractual obligations related to our renewable energy credits are as follows (dollars in millions):

 

Year

 

2012

 

2013

 

2014

 

2015

 

2016

 

Thereafter

 

Total

 

Renewable Energy Credits

 

$

46

 

$

39

 

$

44

 

$

44

 

$

44

 

$

573

 

$

790