CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net unrealized loss, tax benefit (expense)	$ (378)	$ 662	$ 0
Reclassification of net realized gain, tax benefit (expense)	18	(171)	(375)
Pension and other postretirement benefits activity, tax benefit (expense)	(2,256)	1,371	3,452
Arizona Public Service Company
Net unrealized loss, tax benefit (expense)	18	18	0
Reclassification of net realized gain, tax benefit (expense)	18	(171)	(375)
Pension and other postretirement benefits activity, tax benefit (expense)	$ (1,990)	$ 1,955	$ 3,136