Other Income and Other Expense (APSC) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Other income:
Interest income	$ 605	$ 391
Investment gains - net		1,293
Miscellaneous	155	6
Total other income	760	1,690
Other expense:
Non-operating costs	(1,850)	(1,487)
Miscellaneous	(2,165)	(254)
Total other expense	(4,068)	(1,741)
ARIZONA PUBLIC SERVICE COMPANY
Other income:
Interest income	107	130
Investment gains - net		1,150
Miscellaneous	403	698
Total other income	510	1,978
Other expense:
Non-operating costs	(1,741)	(1,899)
Asset dispositions	(223)	(728)
Miscellaneous	(2,660)	(965)
Total other expense	$ (4,624)	$ (3,592)