CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (APSC) (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net unrealized loss, tax benefit	$ 14,900	$ 37,389	$ 61,348
Reclassification of net realized loss, tax benefit	39,120	46,288	48,453
Pension and other postretirement benefits activity, tax (expense) benefit	(651)	3,935	5,608
ARIZONA PUBLIC SERVICE COMPANY
Net unrealized loss, tax benefit	14,888	37,397	61,358
Reclassification of net realized loss, tax benefit	39,119	46,298	48,462
Pension and other postretirement benefits activity, tax (expense) benefit	$ 408	$ 1,910	$ 4,493