Income Taxes - Summary of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax [Line Items]
Tax positions, that if recognized, would decrease our effective tax rate	$ 26,300	$ 25,714	$ 22,813
Unrecognized tax benefit interest expense/(benefit) recognized	(535)	266	459
Unrecognized tax benefit interest accrued	1,320	1,855	1,589
Arizona Public Service Company
Income Tax [Line Items]
Tax positions, that if recognized, would decrease our effective tax rate	26,300	25,714	22,813
Unrecognized tax benefit interest expense/(benefit) recognized	(535)	266	459
Unrecognized tax benefit interest accrued	$ 1,320	$ 1,855	$ 1,589