CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 461,527	$ 456,190	$ 423,696
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	565,011	571,664	496,487
Deferred fuel and purchased power	(60,303)	14,997	(26,927)
Deferred fuel and purchased power amortization	38,152	1,617	40,757
Allowance for equity funds used during construction	(42,140)	(35,215)	(30,790)
Deferred income taxes	206,870	236,819	159,023
Deferred investment tax credit	23,082	8,473	26,246
Change in derivative instruments fair value	(403)	(381)	339
Stock compensation	18,883	18,756	33,059
Change in derivative instruments fair value
Customer and other receivables	(2,489)	(22,219)	(52,672)
Accrued unbilled revenues	(11,709)	4,293	(3,737)
Materials, supplies and fossil fuel	(1,491)	(23,945)	3,724
Income tax receivable	(3,162)	2,509	132,419
Other current assets	(23,324)	3,145	4,384
Accounts payable	(66,917)	(34,266)	(353)
Accrued taxes	447	(2,013)	9,615
Other current liabilities	29,594	603	17,892
Change in margin and collateral accounts — assets	673	(324)	(343)
Change in margin and collateral accounts — liabilities	17,735	22,776	(24,975)
Change in unrecognized tax benefits	1,628	(10,328)	2,778
Change in long-term regulatory liabilities	14,682	(20,535)	59,618
Change in other long-term assets	(60,163)	2,426	(56,561)
Change in other long-term liabilities	(82,793)	(100,715)	(114,052)
Net cash flow provided by operating activities	1,023,390	1,094,327	1,099,627
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,275,472)	(1,076,087)	(910,634)
Contributions in aid of construction	64,296	46,546	20,325
Allowance for borrowed funds used during construction	(19,970)	(16,259)	(15,457)
Proceeds from nuclear decommissioning trust sales	633,410	478,813	356,195
Investment in nuclear decommissioning trust	(635,691)	(496,062)	(373,444)
Other	(18,651)	(3,184)	347
Net cash flow used for investing activities	(1,252,078)	(1,066,233)	(922,668)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	693,151	842,415	731,126
Repayment of long-term debt	(370,430)	(415,570)	(652,578)
Short-term borrowings and payments — net	137,200	(147,400)	(5,725)
Short-term debt borrowings under revolving credit facility	40,000	0	0
Dividends paid on common stock	(274,229)	(260,027)	(246,671)
Common stock equity issuance and purchases - net	(4,867)	19,373	15,288
Distributions to noncontrolling interests	(22,744)	(35,002)	(20,482)
Other	0	1	161
Net cash flow provided by (used for) financing activities	198,081	3,790	(178,881)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(30,607)	31,884	(1,922)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	39,488	7,604	9,526
CASH AND CASH EQUIVALENTS AT END OF YEAR	8,881	39,488	7,604
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	9,956	6,550	(102,154)
Interest, net of amounts capitalized	184,462	170,209	177,074
Significant non-cash investing and financing activities:
Accrued capital expenditures	114,855	83,798	44,712
Dividends declared but not paid	72,926	69,363	65,790
ARIZONA PUBLIC SERVICE COMPANY
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	481,634	469,207	447,320
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	564,091	571,540	496,393
Deferred fuel and purchased power	(60,303)	14,997	(26,927)
Deferred fuel and purchased power amortization	38,152	1,617	40,757
Allowance for equity funds used during construction	(42,140)	(35,215)	(30,790)
Deferred income taxes	221,167	223,069	155,401
Deferred investment tax credit	23,082	8,473	26,246
Change in derivative instruments fair value	(403)	(381)	339
Change in derivative instruments fair value
Customer and other receivables	(1,601)	(21,040)	(52,466)
Accrued unbilled revenues	(11,709)	4,293	(3,737)
Materials, supplies and fossil fuel	(1,454)	(23,945)	3,724
Income tax receivable	(14,567)	0	135,179
Other current assets	(21,640)	4,498	3,766
Accounts payable	(67,543)	(34,891)	(2,355)
Accrued taxes	(13,912)	13,378	8,650
Other current liabilities	5,097	(3,718)	33,970
Change in margin and collateral accounts — assets	673	(324)	(343)
Change in margin and collateral accounts — liabilities	17,735	22,776	(24,975)
Change in unrecognized tax benefits	1,628	(10,328)	2,778
Change in long-term regulatory liabilities	14,682	(20,535)	59,618
Change in other long-term assets	(45,866)	(813)	(62,739)
Change in other long-term liabilities	(76,855)	(82,628)	(85,642)
Net cash flow provided by operating activities	1,009,948	1,100,030	1,124,167
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,248,010)	(1,072,053)	(910,084)
Contributions in aid of construction	64,296	46,546	20,325
Allowance for borrowed funds used during construction	(19,481)	(16,183)	(15,457)
Proceeds from nuclear decommissioning trust sales	633,410	478,813	356,195
Investment in nuclear decommissioning trust	(635,691)	(496,062)	(373,444)
Other	(13,865)	(1,093)	347
Net cash flow used for investing activities	(1,219,341)	(1,060,032)	(922,118)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	693,151	842,415	606,126
Repayment of long-term debt	(370,430)	(415,570)	(527,578)
Short-term borrowings and payments — net	135,500	(147,400)	(5,725)
Dividends paid on common stock	(281,300)	(266,900)	(253,600)
Equity infusion from Pinnacle West	42,000	0	0
Distributions to noncontrolling interests	(22,744)	(35,002)	(20,482)
Net cash flow provided by (used for) financing activities	196,177	(22,457)	(201,259)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(13,216)	17,541	790
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	22,056	4,515	3,725
CASH AND CASH EQUIVALENTS AT END OF YEAR	8,840	22,056	4,515
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	26,864	14,831	(86,054)
Interest, net of amounts capitalized	181,809	167,670	173,436
Significant non-cash investing and financing activities:
Accrued capital expenditures	114,874	83,798	44,712
Dividends declared but not paid	$ 72,900	$ 69,400	$ 65,800