CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 20,727us-gaap_ProfitLoss	$ 24,691us-gaap_ProfitLoss
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	141,494	122,394
Deferred fuel and purchased power	17,671	31,630
Deferred fuel and purchased power amortization	5,614	8,022
Allowance for equity funds used during construction	(9,224)	(7,442)
Deferred income taxes	6,978us-gaap_DeferredIncomeTaxExpenseBenefit	8,810us-gaap_DeferredIncomeTaxExpenseBenefit
Deferred investment tax credit	(294)us-gaap_InvestmentTaxCredit	(247)us-gaap_InvestmentTaxCredit
Change in derivative instruments fair value	(104)us-gaap_UnrealizedGainLossOnDerivatives	(13)us-gaap_UnrealizedGainLossOnDerivatives
Changes in current assets and liabilities:
Customer and other receivables	39,174us-gaap_IncreaseDecreaseInReceivables	25,986us-gaap_IncreaseDecreaseInReceivables
Accrued unbilled revenues	6,133	7,889
Materials, supplies and fossil fuel	(9,995)us-gaap_IncreaseDecreaseInInventories	(187)us-gaap_IncreaseDecreaseInInventories
Income tax receivable	(219)	130,870
Other current assets	(9,631)	(10,669)
Accounts payable	(35,673)	(50,990)
Accrued taxes	48,111	48,139
Other current liabilities	(56,747)	(15,864)
Change in margin and collateral accounts — assets	(276)	(290)
Change in margin and collateral accounts — liabilities	(13,420)	(29,075)
Change in other long-term assets	(14,432)	(9,636)
Change in other long-term liabilities	8,261	(34,861)
Net cash flow provided by operating activities	144,148	249,157
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(251,041)	(207,459)
Contributions in aid of construction	27,222	7,736
Allowance for borrowed funds used during construction	(4,216)	(3,770)
Proceeds from nuclear decommissioning trust sales	115,282us-gaap_ProceedsFromDecommissioningFund	103,157us-gaap_ProceedsFromDecommissioningFund
Investment in nuclear decommissioning trust	(119,594)	(107,470)
Other	(470)	(702)
Net cash flow used for investing activities	(232,817)	(208,508)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	250,000	250,000
Short-term borrowings and payments — net	(102,900)	(143,625)
Dividends paid on common stock	(64,061)us-gaap_PaymentsOfDividendsCommonStock	(62,520)us-gaap_PaymentsOfDividendsCommonStock
Dividends paid on common stock	9,690	9,390
Other	0	1
Net cash flow provided by financing activities	92,729	53,246
NET INCREASE IN CASH AND CASH EQUIVALENTS	4,060	93,895
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	7,604	9,526
CASH AND CASH EQUIVALENTS AT END OF PERIOD	11,664	103,421
Cash paid (received) during the period for:
Income taxes, net of refunds	1,832us-gaap_IncomeTaxesPaidNet	(131,078)us-gaap_IncomeTaxesPaidNet
Interest, net of amounts capitalized	53,555us-gaap_InterestPaidNet	49,147us-gaap_InterestPaidNet
Significant non-cash investing and financing activities:
Accrued capital expenditures	56,165	24,908
Arizona Public Service Company
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	24,473	28,443
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	141,471	122,370
Deferred fuel and purchased power	17,671	31,630
Deferred fuel and purchased power amortization	5,614	8,022
Allowance for equity funds used during construction	(9,224)	(7,442)
Deferred income taxes	2,427	8,696
Deferred investment tax credit	(294)	(247)
Change in derivative instruments fair value	(104)	(13)
Changes in current assets and liabilities:
Customer and other receivables	43,070	25,749
Accrued unbilled revenues	6,133	7,889
Materials, supplies and fossil fuel	(9,995)	(187)
Income tax receivable	0	134,890
Other current assets	(9,116)	(10,807)
Accounts payable	(35,604)	(52,621)
Accrued taxes	59,057	50,580
Other current liabilities	(65,290)	(5,257)
Change in margin and collateral accounts — assets	(276)	(290)
Change in margin and collateral accounts — liabilities	(13,421)	(29,075)
Change in other long-term assets	(17,559)	(10,439)
Change in other long-term liabilities	13,941	(28,083)
Net cash flow provided by operating activities	152,974	273,808
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(250,930)	(207,459)
Contributions in aid of construction	27,222	7,736
Allowance for borrowed funds used during construction	(4,216)	(3,770)
Proceeds from nuclear decommissioning trust sales	115,282	103,157
Investment in nuclear decommissioning trust	(119,594)	(107,470)
Other	(470)	(702)
Net cash flow used for investing activities	(232,706)	(208,508)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	250,000	250,000
Short-term borrowings and payments — net	(102,900)	(153,125)
Dividends paid on common stock	(65,800)	(62,500)
Net cash flow provided by financing activities	81,300	34,375
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,568	99,675
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	4,515	3,725
CASH AND CASH EQUIVALENTS AT END OF PERIOD	6,083	103,400
Cash paid (received) during the period for:
Income taxes, net of refunds	184	(134,323)
Interest, net of amounts capitalized	52,825	47,464
Significant non-cash investing and financing activities:
Accrued capital expenditures	$ 56,165	$ 24,908

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Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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The cash inflow from developers, builders, governmental agencies and municipalities that provide the entity with cash to extend its construction services to their properties.

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