CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net unrealized gain (loss), tax benefit (expense)	$ 58	$ 95	$ (566)	$ 162
Reclassification of net realized loss, tax benefit	3,833	9,348	6,417	15,471
Pension and other postretirement benefits activity, tax benefit (expense)	(3,852)	(625)	(3,724)	(807)
Arizona Public Service Company
Net unrealized gain (loss), tax benefit (expense)	58	95	(566)	162
Reclassification of net realized loss, tax benefit	3,833	9,348	6,417	15,471
Pension and other postretirement benefits activity, tax benefit (expense)	$ (474)	$ (621)	$ (252)	$ (798)