Nuclear Decommissioning Trust (Tables)

3 Months Ended

Mar. 31, 2012

Nuclear Decommissioning Trust

Fair value of APS's nuclear decommissioning trust fund assets

	Fair Value			Total Unrealized Gains		Total Unrealized Losses
March 31, 2012
Equity securities	$	196		$	64	$	—
Fixed income securities	347			21		(1		)
Net receivables (a)	(1		)	—		—
Total	$	542		$	85	$	(1	)

(a)           Net receivables relate to pending securities sales and purchases.

	Fair Value			Total Unrealized Gains		Total Unrealized Losses
December 31, 2011
Equity securities	$	175		$	44	$	(1	)
Fixed income securities	340			23		(1		)
Net payables (a)	(1		)	—		—
Total	$	514		$	67	$	(2	)

(a)Net payables relate to pending securities sales and purchases.

Realized gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds

	Three Months Ended March 31,
	2012			2011
Realized gains	$	2		$	1
Realized losses	(1		)	(2		)
Proceeds from the sale of securities (a)	92			189

(a)           Proceeds are reinvested in the trust.

Fair value of fixed income securities, summarized by contractual maturities

	Fair Value
Less than one year	$	19
1 year - 5 years	85
5 years - 10 years	107
Greater than 10 years	136
Total	$	347