CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 13,007	$ 7,604
Customer and other receivables	362,185	297,740
Accrued unbilled revenues	162,269	100,533
Allowance for doubtful accounts	(3,721)	(3,094)
Materials and supplies (at average cost)	234,987	218,889
Fossil fuel (at average cost)	43,536	37,097
Deferred income taxes	57,857	122,232
Income tax receivable (Note 5)	0	3,098
Assets from risk management activities (Note 7)	13,654	13,785
Deferred fuel and purchased power regulatory asset (Note 3)	0	6,926
Other regulatory assets (Note 3)	139,766	129,808
Other current assets	38,439	38,817
Total current assets	1,061,979	973,435
INVESTMENTS AND OTHER ASSETS
Assets from risk management activities (Note 7)	15,308	17,620
Nuclear decommissioning trust (Note 12)	712,011	713,866
Other assets	52,486	54,047
Total investments and other assets	779,805	785,533
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	15,997,447	15,543,063
Accumulated depreciation and amortization	(5,537,860)	(5,397,751)
Net	10,459,587	10,145,312
Construction work in progress	752,296	682,807
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	118,352	121,255
Intangible assets, net of accumulated amortization	134,937	119,755
Nuclear fuel, net of accumulated amortization	137,519	125,201
Total property, plant and equipment	11,602,691	11,194,330
DEFERRED DEBITS
Regulatory assets (Note 3)	1,102,327	1,054,087
Assets for other postretirement benefits (Note 4)	172,983	152,290
Other	155,233	153,857
Total deferred debits	1,430,543	1,360,234
TOTAL ASSETS	14,875,018	14,313,532
CURRENT LIABILITIES
Accounts payable	233,970	295,211
Accrued taxes (Note 5)	250,679	140,613
Accrued interest	40,045	52,603
Common dividends payable	0	65,790
Short-term borrowings (Note 2)	57,000	147,400
Current maturities of long-term debt (Note 2)	411,433	383,570
Customer deposits	72,455	72,307
Liabilities from risk management activities (Note 7)	74,637	59,676
Deferred fuel and purchased power regulatory liability (Note 3)	12,222	0
Liabilities for asset retirements (Note 15)	26,875	32,462
Other regulatory liabilities (Note 3)	135,970	130,549
Other current liabilities	208,076	178,962
Total current liabilities	1,523,362	1,559,143
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 2)	3,257,347	3,031,215
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,673,394	2,582,636
Regulatory liabilities (Note 3)	995,757	1,051,196
Liabilities for asset retirements (Note 15)	421,949	358,288
Liabilities for pension benefits (Note 4)	383,801	453,736
Liabilities from risk management activities (Note 7)	96,360	50,602
Customer advances	121,905	123,052
Coal mine reclamation	201,040	198,292
Deferred investment tax credit	188,149	178,607
Unrecognized tax benefits (Note 5)	36,634	19,377
Other	184,001	188,286
Total deferred credits and other	$ 5,302,990	$ 5,204,072
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY
Common stock, no par value; authorized 150,000,000 shares, 110,900,630 and 110,649,762 issued at respective dates	$ 2,529,019	$ 2,512,970
Treasury stock at cost; 53,559 and 78,400 shares at respective dates	(1,765)	(3,401)
Total common stock	2,527,254	2,509,569
Retained earnings	2,190,387	1,926,065
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(56,421)	(57,756)
Derivative instruments	(7,569)	(10,385)
Total accumulated other comprehensive loss	(63,990)	(68,141)
Total shareholders’ equity	4,653,651	4,367,493
Noncontrolling interests (Note 6)	137,668	151,609
Total equity	4,791,319	4,519,102
TOTAL LIABILITIES AND EQUITY	14,875,018	14,313,532
Arizona Public Service Company
CURRENT ASSETS
Cash and cash equivalents	5,346	4,515
Customer and other receivables	361,928	297,712
Accrued unbilled revenues	162,269	100,533
Allowance for doubtful accounts	(3,721)	(3,094)
Materials and supplies (at average cost)	234,987	218,889
Fossil fuel (at average cost)	43,536	37,097
Deferred income taxes	54,837	55,253
Assets from risk management activities (Note 7)	13,654	13,785
Deferred fuel and purchased power regulatory asset (Note 3)	0	6,926
Other regulatory assets (Note 3)	139,766	129,808
Other current assets	37,634	38,693
Total current assets	1,050,236	900,117
INVESTMENTS AND OTHER ASSETS
Assets from risk management activities (Note 7)	15,308	17,620
Nuclear decommissioning trust (Note 12)	712,011	713,866
Other assets	34,201	33,362
Total investments and other assets	761,520	764,848
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	15,993,961	15,539,811
Accumulated depreciation and amortization	(5,534,731)	(5,394,650)
Net	10,459,230	10,145,161
Construction work in progress	749,927	682,807
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	118,352	121,255
Intangible assets, net of accumulated amortization	134,782	119,600
Nuclear fuel, net of accumulated amortization	137,519	125,201
Total property, plant and equipment	11,599,810	11,194,024
DEFERRED DEBITS
Regulatory assets (Note 3)	1,102,327	1,054,087
Assets for other postretirement benefits (Note 4)	169,899	149,260
Unamortized debt issue costs	27,353	24,642
Other	126,907	128,026
Total deferred debits	1,426,486	1,356,015
TOTAL ASSETS	14,838,052	14,215,004
CURRENT LIABILITIES
Accounts payable	229,017	289,930
Accrued taxes (Note 5)	346,634	131,110
Accrued interest	39,727	52,358
Common dividends payable	0	65,800
Short-term borrowings (Note 2)	57,000	147,400
Current maturities of long-term debt (Note 2)	411,433	383,570
Customer deposits	72,455	72,307
Liabilities from risk management activities (Note 7)	74,637	59,676
Deferred fuel and purchased power regulatory liability (Note 3)	12,222	0
Liabilities for asset retirements (Note 15)	26,875	32,462
Other regulatory liabilities (Note 3)	135,970	130,549
Other current liabilities	187,294	167,302
Total current liabilities	1,593,264	1,532,464
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,657,038	2,571,365
Regulatory liabilities (Note 3)	995,757	1,051,196
Liabilities for asset retirements (Note 15)	421,949	358,288
Liabilities for pension benefits (Note 4)	356,616	424,508
Liabilities from risk management activities (Note 7)	96,360	50,602
Customer advances	121,905	123,052
Coal mine reclamation	201,040	198,292
Deferred investment tax credit	188,149	178,607
Unrecognized tax benefits (Note 5)	36,636	45,740
Other	142,169	144,823
Total deferred credits and other	$ 5,217,619	$ 5,146,473
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
EQUITY
Total common stock	$ 178,162	$ 178,162
Additional paid-in capital	2,379,696	2,379,696
Retained earnings	2,243,336	1,968,718
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(36,471)	(37,948)
Derivative instruments	(7,569)	(10,385)
Total accumulated other comprehensive loss	(44,040)	(48,333)
Total shareholders’ equity	4,757,154	4,478,243
Noncontrolling interests (Note 6)	137,668	151,609
Total equity	4,894,822	4,629,852
Long-term debt less current maturities (Note 2)	3,132,347	2,906,215
Total capitalization	8,027,169	7,536,067
TOTAL LIABILITIES AND EQUITY	$ 14,838,052	$ 14,215,004