Other Income and Other Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 30, 2022	Nov. 06, 2020
Other income:
Interest income	$ 7,326,000	$ 6,726,000	$ 12,210,000
Investment gains (losses) — net	0	0	2,358,000
Miscellaneous	590,000	53,000	149,000
Total other income	7,916,000	45,100,000	56,703,000
Other expense:
Non-operating costs	(18,619,000)	(13,008,000)	(12,400,000)
Investment gains (losses) - net	(20,537,000)	(1,367,000)
Miscellaneous	(13,229,000)	(11,021,000)	(45,376,000)
Total other expense	(52,385,000)	(25,396,000)	(57,776,000)
Arizona Public Service Company
Other income:
Interest income	5,332,000	4,692,000	9,621,000
Miscellaneous	556,000	40,000	148,000
Total other income	5,888,000	43,053,000	51,755,000
Other expense:
Non-operating costs	(15,579,000)	(10,080,000)	(10,659,000)
Miscellaneous	(10,529,000)	(8,817,000)	(43,035,000)
Total other expense	(26,108,000)	(18,897,000)	(53,694,000)
ACC | Coal Community Transition Plan
Other expense:
Amount funded by shareholders			25,200,000		$ 25,000,000
ACC | Navajo Nation, Electrification Projects | Coal Community Transition Plan
Other expense:
Amount funded by shareholders	7,000,000		10,000,000	$ 500,000	$ 10,000,000
SCR deferral
Other income:
Debt return		14,955,000	15,865,000
SCR deferral | Arizona Public Service Company
Other income:
Debt return	0	14,955,000	15,865,000
Octotillo modernization project
Other income:
Debt return		23,366,000	26,121,000
Octotillo modernization project | Arizona Public Service Company
Other income:
Debt return	$ 0	$ 23,366,000	$ 26,121,000