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Introduction (Tables)
9 Months Ended
Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Asset Retirement Obligations
As of September 30, 2014 and 2013, details of the ARO related to Alabama Power's assets included in Southern Company's and Alabama Power's Condensed Balance Sheets herein are as follows:

2014

2013
 
(in millions)
Balance at beginning of year
$
730


$
589

Liabilities incurred



Liabilities settled
(2
)


Accretion
33


29

Cash flow revisions
52


102

Balance at end of period
$
813


$
720