CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING REVENUES	$ 3,498,682	$ 3,495,443	$ 3,491,632
OPERATING EXPENSES
Fuel and purchased power	1,075,510	1,101,298	1,179,829
Operations and maintenance	911,319	868,377	908,025
Depreciation and amortization	485,829	494,422	417,358
Taxes other than income taxes	166,499	171,812	172,295
Other expenses	3,541	4,932	2,883
Total	2,642,698	2,640,841	2,680,390
OPERATING INCOME	855,984	854,602	811,242
OTHER INCOME (DEDUCTIONS)
Allowance for equity funds used during construction (Note 1)	42,140	35,215	30,790
Other income (Note 17)	901	621	9,608
Other expense (Note 17)	(15,337)	(17,823)	(21,746)
Total	27,704	18,013	18,652
INTEREST EXPENSE
Interest charges	205,720	194,964	200,950
Allowance for borrowed funds used during construction (Note 1)	(19,970)	(16,259)	(15,457)
Total	185,750	178,705	185,493
INCOME BEFORE INCOME TAXES	697,938	693,910	644,401
INCOME TAXES (Note 4)	236,411	237,720	220,705
NET INCOME	461,527	456,190	423,696
Less: Net income attributable to noncontrolling interests (Note 18)	19,493	18,933	26,101
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 442,034	$ 437,257	$ 397,595
Weighted Average common shares outstanding — basic (in shares)	111,409	111,026	110,626
Weighted Average common shares outstanding — diluted (in shares)	112,046	111,552	111,178
EARNINGS PER WEIGHTED-AVERAGE COMMON SHARE OUTSTANDING
Net income attributable to common shareholders - basic (in dollars per share)	$ 3.97	$ 3.94	$ 3.59
Net income attributable to common shareholders — diluted (in dollars per share)	$ 3.95	$ 3.92	$ 3.58
ARIZONA PUBLIC SERVICE COMPANY
ELECTRIC OPERATING REVENUES	$ 3,489,754	$ 3,492,357	$ 3,488,946
OPERATING EXPENSES
Fuel and purchased power	1,082,625	1,101,298	1,179,829
Operations and maintenance	879,108	853,135	882,442
Depreciation and amortization	484,909	494,298	417,264
Taxes other than income taxes	165,779	171,499	171,583
Income taxes (Note 4)	259,353	260,143	245,036
Total	2,871,774	2,880,373	2,896,154
OPERATING INCOME	617,980	611,984	592,792
OTHER INCOME (DEDUCTIONS)
Income taxes (Note 4)	13,511	14,302	7,676
Allowance for equity funds used during construction (Note 1)	42,140	35,215	30,790
Other income (Note 17)	8,607	2,834	11,295
Other expense (Note 17)	(17,514)	(19,019)	(13,403)
Total	46,744	33,332	36,358
INTEREST EXPENSE
Interest on long-term debt	189,828	180,123	186,323
Interest on short-term borrowings	7,983	7,376	6,796
Debt discount, premium and expense	4,760	4,793	4,168
Allowance for borrowed funds used during construction (Note 1)	(19,481)	(16,183)	(15,457)
Total	183,090	176,109	181,830
INCOME TAXES (Note 4)	245,842	245,841	237,360
NET INCOME	481,634	469,207	447,320
Less: Net income attributable to noncontrolling interests (Note 18)	19,493	18,933	26,101
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 462,141	$ 450,274	$ 421,219