CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 8,881	$ 39,488
Customer and other receivables	250,491	274,691
Accrued unbilled revenues	107,949	96,240
Allowance for doubtful accounts	(3,037)	(3,125)
Materials and supplies (at average cost)	253,979	234,234
Fossil fuel (at average cost)	28,608	45,697
Income tax receivable (Note 4)	3,751	589
Assets from risk management activities (Note 16)	19,694	15,905
Deferred fuel and purchased power regulatory asset (Note 3)	12,465	0
Other regulatory assets (Note 3)	94,410	149,555
Other current assets	45,028	37,242
Total current assets	822,219	890,516
INVESTMENTS AND OTHER ASSETS
Assets from risk management activities (Note 16)	1	12,106
Nuclear decommissioning trust (Notes 13 and 19)	779,586	735,196
Other assets	69,063	52,518
Total investments and other assets	848,650	799,820
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)
Plant in service and held for future use	17,341,888	16,222,232
Accumulated depreciation and amortization	(5,970,100)	(5,594,094)
Net	11,371,788	10,628,138
Construction work in progress	1,019,947	816,307
Palo Verde sale leaseback, net of accumulated depreciation of $237,535 and $233,665 (Note 18)	113,515	117,385
Intangible assets, net of accumulated amortization of $603,637 and $546,038	90,022	123,975
Nuclear fuel, net of accumulated amortization of $147,202 and $146,228	119,004	123,139
Total property, plant and equipment	12,714,276	11,808,944
DEFERRED DEBITS
Regulatory assets (Notes 1, 3 and 4)	1,313,428	1,214,146
Assets for other postretirement benefits (Note 7)	166,206	185,997
Other	139,474	128,835
Total deferred debits	1,619,108	1,528,978
Total Assets	16,004,253	15,028,258
CURRENT LIABILITIES
Accounts payable	264,631	297,480
Accrued taxes (Note 4)	138,964	138,600
Accrued interest	52,835	56,305
Common dividends payable	72,926	69,363
Short-term borrowings (Note 5)	177,200	0
Current maturities of long-term debt (Note 6)	125,000	357,580
Customer deposits	82,520	73,073
Liabilities from risk management activities (Note 16)	25,836	77,716
Liabilities for asset retirements (Note 11)	9,135	28,573
Deferred fuel and purchased power regulatory liability (Note 3)	0	9,688
Other regulatory liabilities (Note 3)	99,899	136,078
Other current liabilities	244,000	197,861
Total current liabilities	1,292,946	1,442,317
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 6)	4,021,785	3,462,391
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,945,232	2,723,425
Regulatory liabilities (Notes 1, 3, 4 and 7)	948,916	994,152
Liabilities for asset retirements (Note 11)	615,340	415,003
Liabilities for pension benefits (Note 7)	509,310	480,998
Liabilities from risk management activities (Note 16)	47,238	89,973
Customer advances	88,672	115,609
Coal mine reclamation	221,910	201,984
Deferred investment tax credit	210,162	187,080
Unrecognized tax benefits (Note 4)	10,046	9,524
Other	156,784	186,345
Total deferred credits and other	5,753,610	5,404,093
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY
Common stock, no par value; authorized 150,000,000 shares, 111,392,053 and 111,095,402 issued at respective dates	2,596,030	2,541,668
Treasury stock at cost; 55,317 shares at end of 2016 and 115,030 shares at end of 2015	(4,133)	(5,806)
Total common stock	2,591,897	2,535,862
Retained earnings	2,255,547	2,092,803
Accumulated other comprehensive loss:
Pension and other postretirement benefits (Note 7)	(39,070)	(37,593)
Derivative instruments (Note 16)	(4,752)	(7,155)
Total accumulated other comprehensive loss	(43,822)	(44,748)
Total shareholders’ equity	4,803,622	4,583,917
Noncontrolling interests (Note 18)	132,290	135,540
Total equity	4,935,912	4,719,457
Total Liabilities and Equity	16,004,253	15,028,258
ARIZONA PUBLIC SERVICE COMPANY
CURRENT ASSETS
Cash and cash equivalents	8,840	22,056
Customer and other receivables	262,611	274,428
Accrued unbilled revenues	107,949	96,240
Allowance for doubtful accounts	(3,037)	(3,125)
Materials and supplies (at average cost)	252,777	234,234
Fossil fuel (at average cost)	28,608	45,697
Income tax receivable (Note 4)	11,174	0
Assets from risk management activities (Note 16)	19,694	15,905
Deferred fuel and purchased power regulatory asset (Note 3)	12,465	0
Other regulatory assets (Note 3)	94,410	149,555
Other current assets	41,849	35,765
Total current assets	837,340	870,755
INVESTMENTS AND OTHER ASSETS
Assets from risk management activities (Note 16)	1	12,106
Nuclear decommissioning trust (Notes 13 and 19)	779,586	735,196
Other assets	48,320	34,455
Total investments and other assets	827,907	781,757
PROPERTY, PLANT AND EQUIPMENT (Notes 1, 6 and 9)
Plant in service and held for future use	17,228,787	16,218,724
Accumulated depreciation and amortization	(5,881,941)	(5,590,937)
Net	11,346,846	10,627,787
Construction work in progress	989,497	812,845
Palo Verde sale leaseback, net of accumulated depreciation of $237,535 and $233,665 (Note 18)	113,515	117,385
Intangible assets, net of accumulated amortization of $603,637 and $546,038	89,868	123,820
Nuclear fuel, net of accumulated amortization of $147,202 and $146,228	119,004	123,139
Total property, plant and equipment	12,658,730	11,804,976
DEFERRED DEBITS
Regulatory assets (Notes 1, 3 and 4)	1,313,428	1,214,146
Assets for other postretirement benefits (Note 7)	162,911	182,625
Other	130,859	127,923
Total deferred debits	1,607,198	1,524,694
Total Assets	15,931,175	14,982,182
CURRENT LIABILITIES
Accounts payable	259,161	291,574
Accrued taxes (Note 4)	130,576	144,488
Accrued interest	52,525	56,003
Common dividends payable	72,900	69,400
Short-term borrowings (Note 5)	135,500	0
Current maturities of long-term debt (Note 6)	0	357,580
Customer deposits	82,520	73,073
Liabilities from risk management activities (Note 16)	25,836	77,716
Liabilities for asset retirements (Note 11)	8,703	28,573
Deferred fuel and purchased power regulatory liability (Note 3)	0	9,688
Other regulatory liabilities (Note 3)	99,899	136,078
Other current liabilities	226,417	180,535
Total current liabilities	1,094,037	1,424,708
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,999,295	2,764,489
Regulatory liabilities (Notes 1, 3, 4 and 7)	948,916	994,152
Liabilities for asset retirements (Note 11)	607,234	415,003
Liabilities for pension benefits (Note 7)	488,253	459,065
Liabilities from risk management activities (Note 16)	47,238	89,973
Customer advances	88,672	115,609
Coal mine reclamation	206,645	201,984
Deferred investment tax credit	210,162	187,080
Unrecognized tax benefits (Note 4)	37,408	35,251
Other	143,560	142,683
Total deferred credits and other	5,777,383	5,405,289
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY
Total common stock	178,162	178,162
Additional paid-in capital	2,421,696	2,379,696
Retained earnings	2,331,245	2,148,493
Accumulated other comprehensive loss:
Pension and other postretirement benefits (Note 7)	(20,671)	(19,942)
Derivative instruments (Note 16)	(4,752)	(7,155)
Total accumulated other comprehensive loss	(25,423)	(27,097)
Total shareholders’ equity	4,905,680	4,679,254
Noncontrolling interests (Note 18)	132,290	135,540
Total equity	5,037,970	4,814,794
Long-term debt less current maturities (Note 6)	4,021,785	3,337,391
Total capitalization	9,059,755	8,152,185
Total Liabilities and Equity	$ 15,931,175	$ 14,982,182