CONDENSED CONSOLIDATED BALANCE SHEETS (APSC) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	$ 14,503,810	$ 14,346,367
Accumulated depreciation and amortization	(5,022,729)	(4,929,613)
Net	9,481,081	9,416,754
Construction work in progress	545,231	565,716
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	127,060	128,995
Intangible assets, net of accumulated amortization	162,715	162,150
Nuclear fuel, net of accumulated amortization	156,252	122,778
Total property, plant and equipment	10,472,339	10,396,393
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trust (Note 13)	595,231	570,625
Assets from risk management activities (Note 7)	31,918	35,891
Other assets	64,304	62,694
Total investments and other assets	691,453	669,210
CURRENT ASSETS
Cash and cash equivalents	27,803	26,202
Customer and other receivables	345,581	277,225
Accrued unbilled revenues	163,608	94,845
Allowance for doubtful accounts	(2,821)	(3,340)
Materials and supplies (at average cost)	220,025	218,096
Fossil fuel (at average cost)	33,407	31,334
Deferred fuel and purchased power regulatory asset (Note 3)	26,526	72,692
Other regulatory assets (Note 3)	79,405	71,257
Deferred income taxes	105,146	152,191
Assets from risk management activities (Note 7)	22,575	25,699
Other current assets	42,717	37,102
Total current assets	1,066,289	1,005,726
DEFERRED DEBITS
Regulatory assets (Note 3)	1,120,366	1,099,900
Income tax receivable (Note 5)	71,274	70,389
Other	140,973	137,997
Total deferred debits	1,332,613	1,308,286
TOTAL ASSETS	13,562,694	13,379,615
CAPITALIZATION
Common stock	2,476,754	2,462,712
Retained earnings	1,659,868	1,624,102
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(64,138)	(64,416)
Derivative instruments	(40,319)	(49,592)
Total shareholders' equity	4,032,165	3,972,806
Noncontrolling interests (Note 6)	137,070	129,483
Total equity	4,169,235	4,102,289
Long-term debt less current maturities (Note 2)	2,782,758	3,160,219
Palo Verde sale leaseback lessor notes less current maturities (Note 6)	37,414	38,869
CURRENT LIABILITIES
Short-term borrowings	30,100	92,175
Current maturities of long-term debt (Note 2)	599,131	122,828
Accounts payable	287,368	221,312
Accrued taxes (Note 5)	129,865	124,939
Accrued interest	49,199	49,380
Common dividends payable	59,946	59,789
Customer deposits	78,795	79,689
Liabilities from risk management activities (Note 7)	67,855	73,741
Regulatory liabilities (Note 3)	80,763	88,116
Other current liabilities	154,196	171,573
Total current liabilities	1,537,218	1,083,542
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,175,865	2,151,371
Regulatory liabilities (Note 3)	790,788	759,201
Liability for asset retirements	362,619	357,097
Liabilities for pension and other postretirement benefits (Note 4)	1,013,976	1,058,755
Deferred investment tax credit	119,979	99,819
Liabilities from risk management activities (Note 7)	85,474	85,264
Customer advances	108,335	109,359
Coal mine reclamation	115,145	118,860
Unrecognized tax benefits (Note 5)	72,629	71,135
Other	191,259	183,835
Total deferred credits and other	5,036,069	4,994,696
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
TOTAL LIABILITIES AND EQUITY	13,562,694	13,379,615
ARIZONA PUBLIC SERVICE COMPANY
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	14,499,944	14,342,501
Accumulated depreciation and amortization	(5,019,059)	(4,925,990)
Net	9,480,885	9,416,511
Construction work in progress	545,231	565,716
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	127,060	128,995
Intangible assets, net of accumulated amortization	162,560	161,995
Nuclear fuel, net of accumulated amortization	156,252	122,778
Total property, plant and equipment	10,471,988	10,395,995
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trust (Note 13)	595,231	570,625
Assets from risk management activities (Note 7)	31,918	35,891
Other assets	31,912	31,650
Total investments and other assets	659,061	638,166
CURRENT ASSETS
Cash and cash equivalents	5,956	3,499
Customer and other receivables	344,617	274,815
Accrued unbilled revenues	163,608	94,845
Allowance for doubtful accounts	(2,821)	(3,340)
Materials and supplies (at average cost)	220,025	218,096
Fossil fuel (at average cost)	33,407	31,334
Deferred fuel and purchased power regulatory asset (Note 3)	26,526	72,692
Other regulatory assets (Note 3)	79,405	71,257
Deferred income taxes	86,219	74,420
Assets from risk management activities (Note 7)	22,575	25,699
Other current assets	42,320	37,666
Total current assets	1,021,837	900,983
DEFERRED DEBITS
Regulatory assets (Note 3)	1,120,366	1,099,900
Unamortized debt issue costs	22,718	22,492
Income tax receivable (Note 5)	71,669	70,784
Other	117,123	114,222
Total deferred debits	1,331,876	1,307,398
TOTAL ASSETS	13,484,762	13,242,542
CAPITALIZATION
Common stock	178,162	178,162
Additional paid-in capital	2,379,696	2,379,696
Retained earnings	1,664,420	1,624,237
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(39,232)	(39,503)
Derivative instruments	(40,320)	(49,592)
Total shareholders' equity	4,142,726	4,093,000
Noncontrolling interests (Note 6)	137,070	129,483
Total equity	4,279,796	4,222,483
Long-term debt less current maturities (Note 2)	2,657,758	3,035,219
Palo Verde sale leaseback lessor notes less current maturities (Note 6)	37,414	38,869
Total capitalization	6,974,968	7,296,571
CURRENT LIABILITIES
Short-term borrowings	30,100	92,175
Current maturities of long-term debt (Note 2)	599,131	122,828
Accounts payable	282,408	215,577
Accrued taxes (Note 5)	129,003	116,700
Accrued interest	48,993	49,135
Common dividends payable	59,900	59,800
Customer deposits	78,795	79,689
Liabilities from risk management activities (Note 7)	67,855	73,741
Regulatory liabilities (Note 3)	80,763	88,116
Other current liabilities	125,501	145,326
Total current liabilities	1,502,449	1,043,087
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,215,730	2,133,976
Regulatory liabilities (Note 3)	790,788	759,201
Liability for asset retirements	362,619	357,097
Liabilities for pension and other postretirement benefits (Note 4)	974,877	1,017,556
Deferred investment tax credit	119,979	99,819
Liabilities from risk management activities (Note 7)	85,474	85,264
Customer advances	108,335	109,359
Coal mine reclamation	115,145	118,860
Unrecognized tax benefits (Note 5)	72,423	70,932
Other	161,975	150,820
Total deferred credits and other	5,007,345	4,902,884
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
TOTAL LIABILITIES AND EQUITY	$ 13,484,762	$ 13,242,542