CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 43,040	$ 39,488
Customer and other receivables	278,900	274,691
Accrued unbilled revenues	197,571	96,240
Allowance for doubtful accounts	(2,755)	(3,125)
Materials and supplies (at average cost)	241,612	234,234
Fossil fuel (at average cost)	36,768	45,697
Income tax receivable	0	589
Assets from risk management activities (Note 6)	16,676	15,905
Regulatory assets (Note 3)	108,596	149,555
Other current assets	42,979	37,242
Total current assets	963,387	890,516
INVESTMENTS AND OTHER ASSETS
Assets from risk management activities (Note 6)	5,464	12,106
Nuclear decommissioning trust (Note 11)	767,416	735,196
Other assets	54,401	52,518
Total investments and other assets	827,281	799,820
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	16,663,962	16,222,232
Accumulated depreciation and amortization	(5,733,857)	(5,594,094)
Net	10,930,105	10,628,138
Construction work in progress	966,146	816,307
Palo Verde sale leaseback, net of accumulated depreciation (Note 5)	115,450	117,385
Intangible assets, net of accumulated amortization	108,751	123,975
Nuclear fuel, net of accumulated amortization	120,408	123,139
Total property, plant and equipment	12,240,860	11,808,944
DEFERRED DEBITS
Regulatory assets (Note 3)	1,190,622	1,214,146
Assets for other postretirement benefits (Note 4)	186,505	185,997
Other	129,910	128,835
Total deferred debits	1,507,037	1,528,978
TOTAL ASSETS	15,538,565	15,028,258
CURRENT LIABILITIES
Accounts payable	316,589	297,480
Accrued taxes	145,167	138,600
Accrued interest	57,927	56,305
Common dividends payable	69,484	69,363
Short-term borrowings (Note 2)	64,140	0
Current maturities of long-term debt (Note 2)	293,580	357,580
Customer deposits	79,136	73,073
Liabilities from risk management activities (Note 6)	55,338	77,716
Liabilities for asset retirements (Note 14)	15,513	28,573
Deferred fuel and purchased power regulatory liability (Note 3)	2,439	9,688
Other regulatory liabilities (Note 3)	113,733	136,078
Other current liabilities	265,498	197,861
Total current liabilities	1,478,544	1,442,317
LONG-TERM DEBT LESS CURRENT MATURITIES (Note 2)	3,897,835	3,462,391
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,794,741	2,723,425
Regulatory liabilities (Note 3)	1,010,821	994,152
Liabilities for asset retirements (Note 14)	446,324	415,003
Liabilities for pension benefits (Note 4)	440,919	480,998
Liabilities from risk management activities (Note 6)	52,212	89,973
Customer advances	101,568	115,609
Coal mine reclamation	203,623	201,984
Deferred investment tax credit	184,998	187,080
Unrecognized tax benefits	9,772	9,524
Other	198,025	186,345
Total deferred credits and other	5,443,003	5,404,093
COMMITMENTS AND CONTINGENCIES (SEE NOTE 7)
EQUITY
Common stock, no par value; authorized 150,000,000 shares, 111,175,500 and 111,095,402 issued at respective dates	2,549,498	2,541,668
Treasury stock at cost; 1,900 and 115,030 shares at respective dates	(130)	(5,806)
Total common stock	2,549,368	2,535,862
Retained earnings	2,079,619	2,092,803
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(37,764)	(37,593)
Derivative instruments	(5,955)	(7,155)
Total accumulated other comprehensive loss	(43,719)	(44,748)
Total shareholders’ equity	4,585,268	4,583,917
Noncontrolling interests (Note 5)	133,915	135,540
Total equity	4,719,183	4,719,457
TOTAL LIABILITIES AND EQUITY	15,538,565	15,028,258
Arizona Public Service Company
CURRENT ASSETS
Cash and cash equivalents	31,207	22,056
Customer and other receivables	278,692	274,428
Accrued unbilled revenues	197,571	96,240
Allowance for doubtful accounts	(2,755)	(3,125)
Materials and supplies (at average cost)	241,612	234,234
Fossil fuel (at average cost)	36,768	45,697
Assets from risk management activities (Note 6)	16,676	15,905
Regulatory assets (Note 3)	108,596	149,555
Other current assets	39,602	35,765
Total current assets	947,969	870,755
INVESTMENTS AND OTHER ASSETS
Assets from risk management activities (Note 6)	5,464	12,106
Nuclear decommissioning trust (Note 11)	767,416	735,196
Other assets	34,843	34,455
Total investments and other assets	807,723	781,757
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	16,660,370	16,218,724
Accumulated depreciation and amortization	(5,730,672)	(5,590,937)
Net	10,929,698	10,627,787
Construction work in progress	948,472	812,845
Palo Verde sale leaseback, net of accumulated depreciation (Note 5)	115,450	117,385
Intangible assets, net of accumulated amortization	108,596	123,820
Nuclear fuel, net of accumulated amortization	120,408	123,139
Total property, plant and equipment	12,222,624	11,804,976
DEFERRED DEBITS
Regulatory assets (Note 3)	1,190,622	1,214,146
Assets for other postretirement benefits (Note 4)	183,131	182,625
Other	128,348	127,923
Total deferred debits	1,502,101	1,524,694
TOTAL ASSETS	15,480,417	14,982,182
CURRENT LIABILITIES
Accounts payable	311,655	291,574
Accrued taxes	161,629	144,488
Accrued interest	57,627	56,003
Common dividends payable	69,500	69,400
Short-term borrowings (Note 2)	64,140	0
Current maturities of long-term debt (Note 2)	293,580	357,580
Customer deposits	79,136	73,073
Liabilities from risk management activities (Note 6)	55,338	77,716
Liabilities for asset retirements (Note 14)	15,513	28,573
Deferred fuel and purchased power regulatory liability (Note 3)	2,439	9,688
Other regulatory liabilities (Note 3)	113,733	136,078
Other current liabilities	239,926	180,535
Total current liabilities	1,464,216	1,424,708
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,830,006	2,764,489
Regulatory liabilities (Note 3)	1,010,821	994,152
Liabilities for asset retirements (Note 14)	446,324	415,003
Liabilities for pension benefits (Note 4)	419,545	459,065
Liabilities from risk management activities (Note 6)	52,212	89,973
Customer advances	101,568	115,609
Coal mine reclamation	203,623	201,984
Deferred investment tax credit	184,998	187,080
Unrecognized tax benefits	35,497	35,251
Other	148,993	142,683
Total deferred credits and other	5,433,587	5,405,289
COMMITMENTS AND CONTINGENCIES (SEE NOTE 7)
EQUITY
Total common stock	178,162	178,162
Additional paid-in capital	2,379,696	2,379,696
Retained earnings	2,143,934	2,148,493
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(19,973)	(19,942)
Derivative instruments	(5,955)	(7,155)
Total shareholders’ equity	4,675,864	4,679,254
Noncontrolling interests (Note 5)	133,915	135,540
Total equity	4,809,779	4,814,794
Long-term debt less current maturities (Note 2)	3,772,835	3,337,391
Total capitalization	8,582,614	8,152,185
TOTAL LIABILITIES AND EQUITY	$ 15,480,417	$ 14,982,182