CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	$ 423,696,000	$ 439,966,000	$ 413,164,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	496,487,000	492,322,000	481,262,000
Deferred fuel and purchased power	(26,927,000)	21,678,000	71,573,000
Deferred fuel and purchased power amortization	40,757,000	31,190,000	(116,716,000)
Allowance for equity funds used during construction	(30,790,000)	(25,581,000)	(22,436,000)
Deferred income taxes	159,023,000	249,296,000	187,023,000
Deferred investment tax credit	26,246,000	52,542,000	41,579,000
Change in derivative instruments fair value	339,000	534,000	(749,000)
Change in derivative instruments fair value
Customer and other receivables	(52,672,000)	(44,991,000)	14,587,000
Accrued unbilled revenues	(3,737,000)	(1,951,000)	30,394,000
Materials, supplies and fossil fuel	3,724,000	(11,878,000)	(23,043,000)
Income tax receivable	132,419,000	(133,094,000)	(4,043,000)
Other current assets	4,384,000	(17,913,000)	(27,352,000)
Accounts payable	(353,000)	45,414,000	(96,600,000)
Accrued taxes	9,615,000	6,059,000	12,736,000
Other current liabilities	17,892,000	(7,513,000)	23,869,000
Change in margin and collateral accounts — assets	(343,000)	993,000	2,216,000
Change in margin and collateral accounts — liabilities	(24,975,000)	12,355,000	137,785,000
Change in unrecognized tax benefits	2,778,000	(91,425,000)	(2,583,000)
Change in long-term regulatory liabilities	59,618,000	64,473,000	13,539,000
Change in long-term income tax receivable	0	137,270,000	(1,756,000)
Change in other long-term assets	(59,344,000)	(41,757,000)	6,872,000
Change in other long-term liabilities	(78,210,000)	(24,682,000)	29,801,000
Net cash flow provided by operating activities	1,099,627,000	1,153,307,000	1,171,122,000
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(910,634,000)	(1,016,322,000)	(889,551,000)
Contributions in aid of construction	20,325,000	41,090,000	49,876,000
Allowance for borrowed funds used during construction	(15,457,000)	(14,861,000)	(14,971,000)
Proceeds from nuclear decommissioning trust sales	356,195,000	446,025,000	417,603,000
Investment in nuclear decommissioning trust	(373,444,000)	(463,274,000)	(434,852,000)
Other	347,000	(2,059,000)	(1,099,000)
Net cash flow used for investing activities	(922,668,000)	(1,009,401,000)	(872,994,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	731,126,000	136,307,000	476,081,000
Repayment of long-term debt	(652,578,000)	(122,828,000)	(654,286,000)
Short-term borrowings and payments — net	(5,725,000)	60,950,000	92,175,000
Dividends paid on common stock	(246,671,000)	(235,244,000)	(225,075,000)
Common stock equity issuance	15,288,000	17,319,000	15,955,000
Distributions to noncontrolling interests	(20,482,000)	(17,385,000)	(10,529,000)
Other	161,000	299,000	170,000
Net cash flow used for financing activities	(178,881,000)	(160,582,000)	(305,509,000)
NET DECREASE IN CASH AND CASH EQUIVALENTS	(1,922,000)	(16,676,000)	(7,381,000)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	9,526,000	26,202,000	33,583,000
CASH AND CASH EQUIVALENTS AT END OF YEAR	7,604,000	9,526,000	26,202,000
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	(102,154,000)	18,537,000	2,543,000
Interest, net of amounts capitalized	177,074,000	184,010,000	200,923,000
Significant non-cash investing and financing activities:
Accrued capital expenditures	44,712,000	33,184,000	26,208,000
Dividends declared but not paid	65,790,000	62,528,000	59,789,000
Liabilities assumed relating to acquisition of SCE Four Corners’ interest (see Note 3)	0	145,609,000	0
ARIZONA PUBLIC SERVICE COMPANY
CASH FLOWS FROM OPERATING ACTIVITIES
Net Income	447,320,000	458,861,000	427,110,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization including nuclear fuel	496,393,000	492,226,000	481,168,000
Deferred fuel and purchased power	(26,927,000)	21,678,000	71,573,000
Deferred fuel and purchased power amortization	40,757,000	31,190,000	(116,716,000)
Allowance for equity funds used during construction	(30,790,000)	(25,581,000)	(22,436,000)
Deferred income taxes	155,401,000	278,101,000	202,159,000
Deferred investment tax credit	26,246,000	52,542,000	41,579,000
Change in derivative instruments fair value	339,000	534,000	(749,000)
Change in derivative instruments fair value
Customer and other receivables	(52,466,000)	(46,552,000)	12,914,000
Accrued unbilled revenues	(3,737,000)	(1,951,000)	30,394,000
Materials, supplies and fossil fuel	3,724,000	(11,878,000)	(23,043,000)
Income tax receivable	135,179,000	(134,590,000)	(2,280,000)
Other current assets	3,766,000	(17,112,000)	(27,745,000)
Accounts payable	(2,355,000)	47,870,000	(97,395,000)
Accrued taxes	8,650,000	5,760,000	7,330,000
Other current liabilities	33,970,000	(9,005,000)	6,070,000
Change in margin and collateral accounts — assets	(343,000)	993,000	2,216,000
Change in margin and collateral accounts — liabilities	(24,975,000)	12,355,000	137,785,000
Change in unrecognized tax benefits	2,778,000	(91,244,000)	(2,583,000)
Change in long-term regulatory liabilities	59,618,000	64,473,000	13,539,000
Change in long-term income tax receivable	0	137,665,000	(1,756,000)
Change in other long-term assets	(65,521,000)	(46,043,000)	1,391,000
Change in other long-term liabilities	(82,860,000)	(25,601,000)	34,854,000
Net cash flow provided by operating activities	1,124,167,000	1,194,691,000	1,175,379,000
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(910,084,000)	(1,016,322,000)	(889,551,000)
Contributions in aid of construction	20,325,000	41,090,000	49,876,000
Allowance for borrowed funds used during construction	(15,457,000)	(14,861,000)	(14,971,000)
Proceeds from nuclear decommissioning trust sales	356,195,000	446,025,000	417,603,000
Investment in nuclear decommissioning trust	(373,444,000)	(463,274,000)	(434,852,000)
Other	347,000	(2,067,000)	(1,099,000)
Net cash flow used for investing activities	(922,118,000)	(1,009,409,000)	(872,994,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Issuance of long-term debt	606,126,000	136,307,000	351,081,000
Repayment of long-term debt	(527,578,000)	(122,828,000)	(529,286,000)
Short-term borrowings and payments — net	(5,725,000)	60,950,000	92,175,000
Dividends paid on common stock	(253,600,000)	(242,100,000)	(222,200,000)
Distributions to noncontrolling interests	(20,482,000)	(17,385,000)	(10,529,000)
Net cash flow used for financing activities	(201,259,000)	(185,056,000)	(318,759,000)
NET DECREASE IN CASH AND CASH EQUIVALENTS	790,000	226,000	(16,374,000)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	3,725,000	3,499,000	19,873,000
CASH AND CASH EQUIVALENTS AT END OF YEAR	4,515,000	3,725,000	3,499,000
Supplemental disclosure of cash flow information:
Income taxes, net of refunds	(86,054,000)	7,524,000	1,196,000
Interest, net of amounts capitalized	173,436,000	180,757,000	196,038,000
Significant non-cash investing and financing activities:
Accrued capital expenditures	44,712,000	33,184,000	26,208,000
Dividends declared but not paid	65,800,000	62,500,000	59,800,000
Liabilities assumed relating to acquisition of SCE Four Corners’ interest (see Note 3)	$ 0	$ 145,609,000	$ 0