APS - CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
OPERATING REVENUES (Note 2)	$ 4,695,991	$ 4,324,385	$ 3,803,835
OPERATING EXPENSES
Fuel and purchased power	1,792,657	1,629,343	1,152,551
Operations and maintenance	1,058,725	987,072	954,067
Depreciation and amortization	794,043	753,195	650,875
Taxes other than income taxes	224,013	220,370	234,639
Other expenses	1,913	2,494	6,393
Total	3,871,351	3,592,474	2,998,525
OPERATING INCOME	824,640	731,911	805,310
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction (Note 1)	53,118	45,263	41,737
Pension and other postretirement non-service credits, net (Note 7)	40,648	98,487	112,541
Other income (Note 16)	33,666	7,916	45,100
Other expense (Note 16)	(25,056)	(52,385)	(25,396)
Total	102,376	99,281	173,982
INTEREST EXPENSE
Interest charges	374,887	283,569	254,314
Allowance for borrowed funds used during construction (Note 1)	(43,564)	(28,030)	(21,052)
Total	331,323	255,539	233,262
INCOME BEFORE INCOME TAXES	595,693	575,653	746,030
INCOME TAXES (Note 4)	76,912	74,827	110,086
NET INCOME	518,781	500,826	635,944
Less: Net income attributable to noncontrolling interests (Note 17)	17,224	17,224	17,224
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	501,557	483,602	618,720
Arizona Public Service Company
OPERATING REVENUES (Note 2)	4,695,991	4,324,385	3,803,835
OPERATING EXPENSES
Fuel and purchased power	1,792,657	1,629,343	1,152,551
Operations and maintenance	1,043,570	974,220	940,588
Depreciation and amortization	793,958	753,110	650,773
Taxes other than income taxes	223,962	220,277	234,569
Other expenses	1,913	2,494	6,393
Total	3,856,060	3,579,444	2,984,874
OPERATING INCOME	839,931	744,941	818,961
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction (Note 1)	53,118	45,263	41,737
Pension and other postretirement non-service credits, net (Note 7)	41,577	98,945	112,742
Other income (Note 16)	27,072	5,888	43,053
Other expense (Note 16)	(18,264)	(26,108)	(18,897)
Total	103,503	123,988	178,635
INTEREST EXPENSE
Interest charges	323,719	262,815	243,592
Allowance for borrowed funds used during construction (Note 1)	(39,030)	(26,839)	(21,052)
Total	284,689	235,976	222,540
INCOME BEFORE INCOME TAXES	658,745	632,953	775,056
INCOME TAXES (Note 4)	94,184	90,800	125,553
NET INCOME	564,561	542,153	649,503
Less: Net income attributable to noncontrolling interests (Note 17)	17,224	17,224	17,224
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 547,337	$ 524,929	$ 632,279