Other Income and Other Expense (APSC) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Other income:
Interest income	$ 543	$ 635	$ 935	$ 1,572
Investment gains - net	12		1,307
Miscellaneous	2	308	5	320
Total other income	557	943	2,247	1,892
Other expense:
Non-operating costs	(1,629)	(1,237)	(3,119)	(3,084)
Investment losses - net		(3,561)		(2,339)
Miscellaneous	(1,557)	(852)	(1,808)	(1,753)
Total other expense	(3,186)	(5,650)	(4,927)	(7,176)
ARIZONA PUBLIC SERVICE COMPANY
Other income:
Interest income	89	143	219	211
Investment gains - net	268		1,418
Miscellaneous	876	1,684	1,574	2,234
Total other income	1,233	1,827	3,211	2,445
Other expense:
Non-operating costs	(2,400)	(1,751)	(4,214)	(3,708)
Asset dispositions			(823)
Investment losses - net		(2,700)		(1,535)
Miscellaneous	(2,251)	(1,640)	(3,206)	(3,309)
Total other expense	$ (4,651)	$ (6,091)	$ (8,243)	$ (8,552)