CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net unrealized loss, tax (expense)	$ (585)	$ (342)	$ (438)
Reclassification of net realized loss, tax benefit	985	1,801	7,932
Pension and other postretirement benefits activity, tax benefit (expense)	633	(13,302)	1,307
ARIZONA PUBLIC SERVICE COMPANY
Net unrealized loss, tax (expense)	(585)	(342)	(438)
Reclassification of net realized loss, tax benefit	985	1,801	7,932
Pension and other postretirement benefits activity, tax benefit (expense)	$ 293	$ (11,776)	$ 4,655