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Regulatory Matters
3 Months Ended
Mar. 31, 2013
Regulated Operations [Abstract]  
Public Utilities Disclosure [Text Block]
Accounting for Regulatory Activities
Regulatory Assets and Liabilities

Regulatory assets and liabilities represent probable future revenues or expenses associated with certain charges and credits that will be recovered from or refunded to customers through the ratemaking process.  We included the amounts of our regulatory assets and liabilities within “Other current assets,” “Deferred charges and other assets,” “Accrued other current liabilities” and “Other long-term liabilities and deferred credits,” respectively, in our accompanying consolidated balance sheets. The recovery period for these regulatory assets is approximately 20 years.

The following table summarizes our regulatory asset and liability balances (in millions):

 
March 31, 2013
 
December 31, 2012
Current regulatory assets
$
26

 
$
18

Non-current regulatory assets
203

 
204

Total Regulatory Assets
$
229

 
$
222

 
 
 
 
Current regulatory liabilities
$
4

 
$
4

Non-current regulatory liabilities
62

 
65

Total Regulatory Liabilities
$
66

 
$
69



More information about our regulatory matters can be found in Note 17 Regulatory Matters” to our consolidated financial statements that were included in our 2012 Form 10-K.