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Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2014

Regulatory Assets [Line Items]

Schedule of Regulatory Assets and Liabilities [Table Text Block]

Regulatory assets and liabilities consist of the following (dollars in millions):



	Weighted Average Remaining Life ⁽¹⁾		As of December 31,
			2014								2013
			Current				Noncurrent				Current				Noncurrent
Regulatory assets:
Price risk management ⁽²⁾	3 years		$	100			$	121			$	36			$	140
Pension and other postretirement plans ⁽²⁾	⁽³⁾		—				247				—				194
Deferred income taxes ⁽²⁾	⁽⁴⁾		—				86				—				76
Debt issuance costs ⁽²⁾	8 years		—				15				—				17
Deferred capital projects	1 year		19				—				16				18
Other ⁽⁵⁾	Various		14				25				14				19
Total regulatory assets			$	133			$	494			$	66			$	464
Regulatory liabilities:
Asset retirement removal costs ⁽⁶⁾	⁽⁴⁾		$	—			$	804			$	—			$	747
Trojan decommissioning activities	2 years		23				34				—				49
Asset retirement obligations ⁽⁶⁾	⁽⁴⁾		—				39				—				39
Other	Various		37				29				1				30
Total regulatory liabilities			$	60		⁽⁷⁾	$	906			$	1		⁽⁷⁾	$	865


(1)	As of December 31, 2014.


(2)	Does not include a return on investment.


(3)	Recovery expected over the average service life of employees. For additional information, see Note 2, Summary of Significant Accounting Policies.


(4)	Recovery expected over the estimated lives of the assets.


(5)	Of the total other unamortized regulatory asset balances, a return is recorded on $33 million and $16 million as of December 31, 2014 and 2013, respectively.


(6)	Included in rate base for ratemaking purposes.


(7)	Included in Accrued expenses and other current liabilities on the consolidated balance sheets.