EMPLOYEE BENEFIT PLANS

3 Months Ended

Mar. 31, 2014

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EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

UNS Energy’s net periodic benefit plan cost, comprised primarily of TEP's cost, includes the following components:

	Pension Benefits						Other Retiree Benefits
	Three Months Ended March 31,
	2014			2013			2014		2013
	Millions of Dollars
Service Cost	$	3		$	3		$	1	$	1
Interest Cost	4			4			1		1
Expected Return on Plan Assets	(6		)	(5		)	—		—
Actuarial Loss Amortization	1			2			—		—
Net Periodic Benefit Cost	$	2		$	4		$	2	$	2