Nuclear Decommissioning Trust (Tables)

9 Months Ended

Sep. 30, 2011

Nuclear Decommissioning Trust

Fair value of APS's nuclear decommissioning trust fund assets

	Fair Value		Total Unrealized Gains		Total Unrealized Losses
September 30, 2011
Equity securities	$	154	$	31	$	(5	)
Fixed income securities	333		23		(1		)
Net receivables (a)	2		—		—
Total	$	489	$	54	$	(6	)

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

	Fair Value			Total Unrealized Gains		Total Unrealized Losses
December 31, 2010
Equity securities	$	168		$	43	$	(1	)
Fixed income securities	312			12		(2		)
Net payables (a)	(10		)	—		—
Total	$	470		$	55	$	(3	)

(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 September 30,					Nine Months Ended September 30,
	2011			2010		2011			2010
Realized gains	$	3		$	1	$	6		$	15
Realized losses	(1		)	—		(4		)	(3		)
Proceeds from the sale of securities (a)	106			94		406			424

(a)           Proceeds are reinvested in the trust.

Fair value of fixed income securities, summarized by contractual maturities

	Fair Value
Less than one year	$	16
1 year -5 years	78
5 years - 10 years	114
Greater than 10 years	125
Total	$	333