CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
NET INCOME	$ 530,540	$ 507,949	$ 461,527
Derivative instruments:
Net unrealized loss, net of tax benefit (expense)	(78)	(35)	(538)
Reclassification of net realized loss, net of tax benefit	1,527	2,225	2,941
Pension and other postretirement benefits activity, net of tax (expense) benefit	4,397	(3,370)	(1,477)
Total other comprehensive income (loss)	5,846	(1,180)	926
COMPREHENSIVE INCOME	536,386	506,769	462,453
Less: Comprehensive income attributable to noncontrolling interests	19,493	19,493	19,493
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	516,893	487,276	442,960
ARIZONA PUBLIC SERVICE COMPANY
NET INCOME	589,758	523,802	481,634
Derivative instruments:
Net unrealized loss, net of tax benefit (expense)	(78)	(35)	(538)
Reclassification of net realized loss, net of tax benefit	1,527	2,225	2,941
Pension and other postretirement benefits activity, net of tax (expense) benefit	3,465	(3,750)	(729)
Total other comprehensive income (loss)	4,914	(1,560)	1,674
COMPREHENSIVE INCOME	594,672	522,242	483,308
Less: Comprehensive income attributable to noncontrolling interests	19,493	19,493	19,493
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 575,179	$ 502,749	$ 463,815