Lines of Credit and Short-Term Borrowings (Tables)

12 Months Ended

Dec. 31, 2011

Lines of Credit and Short-Term Borrowings

Schedule of credit facilities and amounts available and outstanding

The table below presents the consolidated credit facilities and the amounts available and outstanding as of December 31, 2011 (dollars in millions):

Credit Facility	Expiration	Amount Committed		Unused Amount		Commitment Fees
Pinnacle West Revolving Credit Facility	November 2016	$	200	$	200	0.275	%
APS Revolving Credit Facility	November 2016	500		500		0.225	%
APS Revolving Credit Facility	February 2015	500		500		0.250	%
Total		$	1,200	$	1,200

The table below presents the consolidated credit facilities and amounts available and outstanding and other short-term borrowings as of December 31, 2010 (dollars in millions):

Credit Facility	Expiration	Amount Committed		Letters of Credit Used		Short-Term Borrowings		Unused Amount		Weighted Average Interest Rate		Commitment Fees
Pinnacle West Revolving Credit Facility	February 2013	$	200	$	—	$	—	$	183	—		0.625	%
Pinnacle West Commercial Paper	January 2011	—		—		17		—		0.840	%	—
APS Revolving Credit Facility	February  2013	500		—		—		500		—		0.500	%
APS Revolving Credit Facility	September 2011	489		20		—		469		—		0.100	%
Total		$	1,189	$	20	$	17	$	1,152