CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net unrealized loss, tax benefit (expense)	$ 662	$ 0	$ (78)
Reclassification of net realized gain, tax expense	171	375	473
Pension and other postretirement benefits activity, tax benefit (expense)	1,371	3,452	(1,585)
ARIZONA PUBLIC SERVICE COMPANY
Net unrealized loss, tax benefit (expense)	(18)	0	(78)
Reclassification of net realized gain, tax expense	(171)	(375)	(473)
Pension and other postretirement benefits activity, tax benefit (expense)	$ 1,955	$ 3,136	$ (1,159)