CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	$ 135,508	$ 148,234
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	282,291	282,218
Deferred fuel and purchased power	(21,026)	11,711
Deferred fuel and purchased power amortization	13,778	11,424
Allowance for equity funds used during construction	(20,885)	(18,569)
Deferred income taxes	65,881	65,377
Deferred investment tax credit	(2,083)	(2,218)
Change in derivative instruments fair value	(237)	(225)
Changes in current assets and liabilities:
Customer and other receivables	(19,898)	(17,402)
Accrued unbilled revenues	(101,331)	(84,683)
Materials, supplies and fossil fuel	1,551	(18,311)
Income tax receivable	589	3,098
Other current assets	(5,649)	(8,728)
Accounts payable	47,621	36,634
Accrued taxes	6,567	15,199
Other current liabilities	53,912	(13,138)
Change in margin and collateral accounts — assets	(34)	(4,552)
Change in margin and collateral accounts — liabilities	18,010	26,853
Change in other long-term assets	(41,101)	(1,616)
Change in other long-term liabilities	9,011	(37,012)
Net cash flow provided by operating activities	422,475	394,294
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(731,609)	(531,035)
Contributions in aid of construction	29,127	41,010
Allowance for borrowed funds used during construction	(10,528)	(8,538)
Proceeds from nuclear decommissioning trust sales	290,594	225,779
Investment in nuclear decommissioning trust	(291,734)	(234,651)
Other	(1,307)	(2,068)
Net cash flow used for investing activities	(715,457)	(509,503)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	445,933	600,000
Repayment of long-term debt	(76,850)	(344,847)
Short-term borrowing and payments — net	64,140	10,100
Dividends paid on common stock	(135,335)	(128,241)
Common stock equity issuance - net of purchases	10,017	12,161
Distributions to noncontrolling interests	(11,372)	(28,012)
Other	1	1
Net cash flow provided by financing activities	296,534	121,162
NET INCREASE IN CASH AND CASH EQUIVALENTS	3,552	5,953
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	39,488	7,604
CASH AND CASH EQUIVALENTS AT END OF PERIOD	43,040	13,557
Cash paid during the period for:
Income taxes, net of refunds	2,503	1,834
Interest, net of amounts capitalized	89,109	84,008
Significant non-cash investing and financing activities:
Accrued capital expenditures	55,286	38,985
Dividends declared but not yet paid	69,484	65,933
Arizona Public Service Company
CASH FLOWS FROM OPERATING ACTIVITIES
NET INCOME	144,188	154,440
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	282,221	282,172
Deferred fuel and purchased power	(21,026)	11,711
Deferred fuel and purchased power amortization	13,778	11,424
Allowance for equity funds used during construction	(20,885)	(18,569)
Deferred income taxes	60,131	24,442
Deferred investment tax credit	(2,083)	(2,218)
Change in derivative instruments fair value	(237)	(225)
Changes in current assets and liabilities:
Customer and other receivables	(19,809)	(9,250)
Accrued unbilled revenues	(101,331)	(84,683)
Materials, supplies and fossil fuel	1,551	(18,311)
Other current assets	(3,749)	(8,193)
Accounts payable	48,593	37,656
Accrued taxes	17,141	68,382
Other current liabilities	44,711	(31,408)
Change in margin and collateral accounts — assets	(34)	(4,552)
Change in margin and collateral accounts — liabilities	18,010	26,853
Change in other long-term assets	(38,780)	(3,564)
Change in other long-term liabilities	3,979	(30,337)
Net cash flow provided by operating activities	426,369	405,770
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(717,729)	(530,850)
Contributions in aid of construction	29,127	41,010
Allowance for borrowed funds used during construction	(10,039)	(8,527)
Proceeds from nuclear decommissioning trust sales	290,594	225,779
Investment in nuclear decommissioning trust	(291,734)	(234,651)
Other	(388)	(614)
Net cash flow used for investing activities	(700,169)	(507,853)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	445,933	600,000
Repayment of long-term debt	(76,850)	(344,847)
Short-term borrowing and payments — net	64,140	10,100
Dividends paid on common stock	(138,900)	(131,700)
Distributions to noncontrolling interests	(11,372)	(28,012)
Net cash flow provided by financing activities	282,951	105,541
NET INCREASE IN CASH AND CASH EQUIVALENTS	9,151	3,458
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	22,056	4,515
CASH AND CASH EQUIVALENTS AT END OF PERIOD	31,207	7,973
Cash paid during the period for:
Income taxes, net of refunds	8,772	184
Interest, net of amounts capitalized	88,066	82,651
Significant non-cash investing and financing activities:
Accrued capital expenditures	55,286	38,985
Dividends declared but not yet paid	$ 69,500	$ 65,900