Other Income and Other Expense (APSC) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other income:
Interest income	$ 76	$ 605
Miscellaneous	682	155
Total other income	758	760
Other expense:
Non-operating costs	(1,932)	(1,850)
Miscellaneous	(1,708)	(2,165)
Total other expense	(3,752)	(4,068)
ARIZONA PUBLIC SERVICE COMPANY
Other income:
Interest income	23	107
Miscellaneous	1,320	403
Total other income	1,343	510
Other expense:
Non-operating costs	(2,320)	(1,741)
Asset dispositions	(1,264)	(223)
Miscellaneous	(2,712)	(2,660)
Total other expense	$ (6,296)	$ (4,624)