Other Income and Other Expense (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other income:
Interest income	$ 1,010	$ 1,629	$ 1,239
Investment gains - net	8,386		0
Miscellaneous	212	75	367
Total other income	9,608	1,704	1,606
Other expense:
Non-operating costs	(9,657)	(8,207)	(7,777)
Investment loss - net	(9,426)	(3,711)	(2,453)
Miscellaneous	(2,663)	(4,106)	(9,612)
Total other expense	(21,746)	(16,024)	(19,842)
ARIZONA PUBLIC SERVICE COMPANY
Other income:
Interest income	689	1,234	310
Investment gains - net	8,386	0	0
Miscellaneous	2,220	2,662	2,558
Total other income	11,295	3,896	2,868
Other expense:
Non-operating costs	(10,397)	(9,626)	(8,706)
Asset dispositions	(615)	(4,992)	(1,511)
Miscellaneous	(2,391)	(5,831)	(10,933)
Total other expense	$ (13,403)	$ (20,449)	$ (21,150)