Revenue - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Operating revenues	$ 4,324,385	$ 3,803,835	$ 3,586,982
Regulatory cost recovery revenue	22,000	44,000	54,000
Retail Electric Service | Residential
Disaggregation of Revenue [Line Items]
Operating revenues	2,046,111	1,913,324	1,929,178
Retail Electric Service | Arizona Attorney General Settlement | Residential
Disaggregation of Revenue [Line Items]
Operating revenues			(24,000)
Electric and Transmission Service
Disaggregation of Revenue [Line Items]
Operating revenues	$ 4,302,000	$ 3,760,000	$ 3,533,000