APS - CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
PROPERTY, PLANT AND EQUIPMENT
Accumulated depreciation of Palo Verde sale leaseback	$ 260,754	$ 256,884
Accumulated amortization on intangible assets	817,961	737,694
Accumulated amortization on nuclear fuel	$ 126,157	$ 133,122
EQUITY
Common stock, authorized shares (in shares)	150,000,000	150,000,000
Common stock, issued shares (in shares)	113,247,189	113,014,528
Treasury stock (in shares)	73,613	87,608
Arizona Public Service Company
PROPERTY, PLANT AND EQUIPMENT
Accumulated depreciation of Palo Verde sale leaseback	$ 260,754	$ 256,884
Accumulated amortization on intangible assets	816,827	736,560
Accumulated amortization on nuclear fuel	$ 126,157	$ 133,122