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



	Weighted Average Remaining Life ⁽¹⁾	As of December 31,
		2013					2012
		Current			Noncurrent		Current			Noncurrent
Regulatory assets:
Price risk management ⁽²⁾	6 years	$	36		$	140	$	123		$	71
Pension and other postretirement plans ⁽²⁾	⁽³⁾	—			194		—			321
Deferred income taxes ⁽²⁾	⁽⁴⁾	—			76		—			80
Deferred broker settlements ⁽²⁾	1 year	12			1		20			1
Debt issuance costs ⁽²⁾	8 years	—			17		—			22
Deferred capital projects	2 years	16			18		—			16
Other ⁽⁵⁾	Various	2			18		1			13
Total regulatory assets		$	66		$	464	$	144		$	524
Regulatory liabilities:
Asset retirement removal costs ⁽⁷⁾	⁽⁴⁾	$	—		$	747	$	—		$	692
Trojan decommissioning activities	⁽⁶⁾	—			41		—			—
Asset retirement obligations ⁽⁷⁾	⁽⁴⁾	—			39		—			39
Other	Various	1			38		12			34
Total regulatory liabilities		$	1	⁽⁸⁾	$	865	$	12	⁽⁸⁾	$	765


(1)	As of December 31, 2013.


(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 $16 million and $15 million as of December 31, 2013 and 2012, respectively.


(6)	Refund period not yet determined.


(7)	Included in rate base for ratemaking purposes.


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