CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
OPERATING REVENUES (NOTE 2)	$ 3,471,209	$ 3,691,247	$ 3,565,296
OPERATING EXPENSES
Fuel and purchased power	1,042,237	1,076,116	981,301
Operations and maintenance	941,616	1,036,744	949,107
Depreciation and amortization	590,929	582,354	534,118
Taxes other than income taxes	218,579	212,849	184,347
Other expenses	5,888	9,497	6,660
Total	2,799,249	2,917,560	2,655,533
Operating loss	671,960	773,687	909,763
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction (Note 1)	31,431	52,319	47,011
Pension and other postretirement non-service credits - net (Note 8)	22,989	49,791	24,664
Other income (Note 18)	50,263	24,896	4,006
Other expense (Note 18)	(17,880)	(17,966)	(21,539)
Total	86,803	109,040	54,142
INTEREST EXPENSE
Interest charges	235,251	243,465	219,796
Allowance for borrowed funds used during construction (Note 1)	(18,528)	(25,180)	(22,112)
Total	216,723	218,285	197,684
INCOME BEFORE INCOME TAXES	542,040	664,442	766,221
Income tax benefit	(15,773)	133,902	258,272
NET INCOME	557,813	530,540	507,949
Less: Net income attributable to noncontrolling interests (Note 19)	19,493	19,493	19,493
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 538,320	$ 511,047	$ 488,456
Net effect of dilutive securities:
Weighted Average common shares outstanding — basic (in shares)	112,443	112,129	111,839
Weighted Average common shares outstanding — diluted (in shares)	112,758	112,550	112,367
EARNINGS PER WEIGHTED-AVERAGE COMMON SHARE OUTSTANDING
Net income attributable to common shareholders - basic (in dollars per share)	$ 4.79	$ 4.56	$ 4.37
Net income attributable to common shareholders — diluted (in dollars per share)	$ 4.77	$ 4.54	$ 4.35
ARIZONA PUBLIC SERVICE COMPANY
OPERATING REVENUES (NOTE 2)	$ 3,471,209	$ 3,688,342	$ 3,557,652
OPERATING EXPENSES
Fuel and purchased power	1,042,237	1,094,020	992,744
Operations and maintenance	926,716	969,227	917,983
Depreciation and amortization	590,844	580,694	532,423
Taxes other than income taxes	218,540	212,136	183,254
Other expenses	5,888	2,497	6,709
Total	2,784,225	2,858,574	2,633,113
Operating loss	686,984	829,768	924,539
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction (Note 1)	31,431	52,319	47,011
Pension and other postretirement non-service credits - net (Note 8)	24,529	51,242	24,371
Other income (Note 18)	46,884	22,746	3,013
Other expense (Note 18)	(12,990)	(15,292)	(13,913)
Total	89,854	111,015	60,482
INTEREST EXPENSE
Interest charges	220,174	231,391	214,163
Allowance for borrowed funds used during construction (Note 1)	(18,528)	(25,180)	(22,112)
Total	201,646	206,211	192,051
INCOME BEFORE INCOME TAXES	575,192	734,572	792,970
Income tax benefit	(9,572)	144,814	269,168
NET INCOME	584,764	589,758	523,802
Less: Net income attributable to noncontrolling interests (Note 19)	19,493	19,493	19,493
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 565,271	$ 570,265	$ 504,309