CONDENSED CONSOLIDATED BALANCE SHEETS (APSC) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	$ 14,494,326	$ 14,346,367
Accumulated depreciation and amortization	(4,997,126)	(4,929,613)
Net	9,497,200	9,416,754
Construction work in progress	498,124	565,716
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	128,027	128,995
Intangible assets, net of accumulated amortization	162,978	162,150
Nuclear fuel, net of accumulated amortization	140,909	122,778
Total property, plant and equipment	10,427,238	10,396,393
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trust (Note 13)	596,168	570,625
Assets from risk management activities (Note 7)	34,047	35,891
Other assets	64,325	62,694
Total investments and other assets	694,540	669,210
CURRENT ASSETS
Cash and cash equivalents	25,109	26,202
Customer and other receivables	267,937	277,225
Accrued unbilled revenues	90,147	94,845
Allowance for doubtful accounts	(2,537)	(3,340)
Materials and supplies (at average cost)	223,605	218,096
Fossil fuel (at average cost)	35,211	31,334
Deferred fuel and purchased power regulatory asset (Note 3)	41,315	72,692
Other regulatory assets (Note 3)	52,872	71,257
Deferred income taxes	75,866	152,191
Assets from risk management activities (Note 7)	20,346	25,699
Other current assets	39,050	37,102
Total current assets	871,777	1,005,726
DEFERRED DEBITS
Regulatory assets (Note 3)	1,097,389	1,099,900
Income tax receivable (Note 5)	70,828	70,389
Other	139,155	137,997
Total deferred debits	1,307,372	1,308,286
TOTAL ASSETS	13,300,927	13,379,615
CAPITALIZATION
Common stock	2,473,865	2,462,712
Retained earnings	1,648,521	1,624,102
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(63,450)	(64,416)
Derivative instruments	(44,481)	(49,592)
Total shareholders' equity	4,014,455	3,972,806
Noncontrolling interests (Note 6)	137,875	129,483
Total equity	4,152,330	4,102,289
Long-term debt less current maturities	3,265,589	3,160,219
Palo Verde sale leaseback lessor notes less current maturities (Note 6)	38,869	38,869
CURRENT LIABILITIES
Current maturities of long-term debt	122,828	122,828
Accounts payable	212,078	221,312
Accrued taxes (Note 5)	164,554	124,939
Accrued interest	44,818	49,380
Common dividends payable		59,789
Customer deposits	80,783	79,689
Liabilities from risk management activities (Note 7)	65,354	73,741
Regulatory liabilities (Note 3)	76,640	88,116
Other current liabilities	124,456	171,573
Total current liabilities	891,511	1,083,542
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,064,476	2,151,371
Regulatory liabilities (Note 3)	805,230	759,201
Liability for asset retirements	358,184	357,097
Liabilities for pension and other postretirement benefits (Note 4)	1,034,327	1,058,755
Liabilities from risk management activities (Note 7)	82,876	85,264
Customer advances	108,986	109,359
Coal mine reclamation	119,044	118,860
Unrecognized tax benefits (Note 5)	72,252	71,135
Other	307,253	283,654
Total deferred credits and other	4,952,628	4,994,696
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
TOTAL LIABILITIES AND EQUITY	13,300,927	13,379,615
ARIZONA PUBLIC SERVICE COMPANY
PROPERTY, PLANT AND EQUIPMENT
Plant in service and held for future use	14,490,460	14,342,501
Accumulated depreciation and amortization	(4,993,480)	(4,925,990)
Net	9,496,980	9,416,511
Construction work in progress	498,124	565,716
Palo Verde sale leaseback, net of accumulated depreciation (Note 6)	128,027	128,995
Intangible assets, net of accumulated amortization	162,823	161,995
Nuclear fuel, net of accumulated amortization	140,909	122,778
Total property, plant and equipment	10,426,863	10,395,995
INVESTMENTS AND OTHER ASSETS
Nuclear decommissioning trust (Note 13)	596,168	570,625
Assets from risk management activities (Note 7)	34,047	35,891
Other assets	32,120	31,650
Total investments and other assets	662,335	638,166
CURRENT ASSETS
Cash and cash equivalents	7,328	3,499
Customer and other receivables	266,994	274,815
Accrued unbilled revenues	90,147	94,845
Allowance for doubtful accounts	(2,537)	(3,340)
Materials and supplies (at average cost)	223,605	218,096
Fossil fuel (at average cost)	35,211	31,334
Deferred fuel and purchased power regulatory asset (Note 3)	41,315	72,692
Other regulatory assets (Note 3)	52,872	71,257
Deferred income taxes	59,807	74,420
Assets from risk management activities (Note 7)	20,346	25,699
Other current assets	39,354	37,666
Total current assets	834,442	900,983
DEFERRED DEBITS
Regulatory assets (Note 3)	1,097,389	1,099,900
Unamortized debt issue costs	22,889	22,492
Income tax receivable (Note 5)	71,223	70,784
Other	114,903	114,222
Total deferred debits	1,306,404	1,307,398
TOTAL ASSETS	13,230,044	13,242,542
CAPITALIZATION
Common stock	178,162	178,162
Additional paid-in capital	2,379,696	2,379,696
Retained earnings	1,650,277	1,624,237
Accumulated other comprehensive loss:
Pension and other postretirement benefits	(38,621)	(39,503)
Derivative instruments	(44,482)	(49,592)
Total shareholders' equity	4,125,032	4,093,000
Noncontrolling interests (Note 6)	137,875	129,483
Total equity	4,262,907	4,222,483
Long-term debt less current maturities	3,140,589	3,035,219
Palo Verde sale leaseback lessor notes less current maturities (Note 6)	38,869	38,869
Total capitalization	7,442,365	7,296,571
CURRENT LIABILITIES
Commercial paper		92,175
Current maturities of long-term debt	122,828	122,828
Accounts payable	207,310	215,577
Accrued taxes (Note 5)	159,762	116,700
Accrued interest	44,649	49,135
Common dividends payable		59,800
Customer deposits	80,783	79,689
Liabilities from risk management activities (Note 7)	65,354	73,741
Regulatory liabilities (Note 3)	76,640	88,116
Other current liabilities	102,349	145,326
Total current liabilities	859,675	1,043,087
DEFERRED CREDITS AND OTHER
Deferred income taxes	2,109,332	2,133,976
Regulatory liabilities (Note 3)	805,230	759,201
Liability for asset retirements	358,184	357,097
Liabilities for pension and other postretirement benefits (Note 4)	994,365	1,017,556
Liabilities from risk management activities (Note 7)	82,876	85,264
Customer advances	108,986	109,359
Coal mine reclamation	119,044	118,860
Unrecognized tax benefits (Note 5)	72,047	70,932
Other	277,940	250,639
Total deferred credits and other	4,928,004	4,902,884
COMMITMENTS AND CONTINGENCIES (SEE NOTES)
TOTAL LIABILITIES AND EQUITY	$ 13,230,044	$ 13,242,542