Represents the equity in earnings or losses of subsidiaries for the reporting period.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Total costs of sales and operating expenses for the period.

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- Definition

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Total interest costs incurred during the period and either capitalized or charged against earnings.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business).

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The net result for the period of deducting operating expenses from operating revenues.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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SCHEDULE I - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Statement of Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CONDENSED FINANCIAL STATEMENTS
Operating revenues	$ 726,450us-gaap_SalesRevenueNet	$ 1,172,667us-gaap_SalesRevenueNet	$ 906,264us-gaap_SalesRevenueNet	$ 686,251us-gaap_SalesRevenueNet	$ 699,762us-gaap_SalesRevenueNet	$ 1,152,392us-gaap_SalesRevenueNet	$ 915,822us-gaap_SalesRevenueNet	$ 686,652us-gaap_SalesRevenueNet	$ 3,491,632us-gaap_SalesRevenueNet	$ 3,454,628us-gaap_SalesRevenueNet	$ 3,301,804us-gaap_SalesRevenueNet
Operating expenses									2,680,390us-gaap_CostsAndExpenses	2,608,305us-gaap_CostsAndExpenses	2,450,049us-gaap_CostsAndExpenses
OPERATING INCOME	60,184us-gaap_OperatingIncomeLoss	421,775us-gaap_OperatingIncomeLoss	254,113us-gaap_OperatingIncomeLoss	75,170us-gaap_OperatingIncomeLoss	83,900us-gaap_OperatingIncomeLoss	415,688us-gaap_OperatingIncomeLoss	259,812us-gaap_OperatingIncomeLoss	86,923us-gaap_OperatingIncomeLoss	811,242us-gaap_OperatingIncomeLoss	846,323us-gaap_OperatingIncomeLoss	851,755us-gaap_OperatingIncomeLoss
Other
Total									18,652us-gaap_NonoperatingIncomeExpense	11,261us-gaap_NonoperatingIncomeExpense	4,200us-gaap_NonoperatingIncomeExpense
Interest expense									200,950us-gaap_InterestCostsIncurred	201,888us-gaap_InterestCostsIncurred	214,616us-gaap_InterestCostsIncurred
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									644,401	670,557	656,310
Income tax benefit	5,007us-gaap_IncomeTaxExpenseBenefit	134,753us-gaap_IncomeTaxExpenseBenefit	74,540us-gaap_IncomeTaxExpenseBenefit	6,405us-gaap_IncomeTaxExpenseBenefit	9,167us-gaap_IncomeTaxExpenseBenefit	131,912us-gaap_IncomeTaxExpenseBenefit	77,043us-gaap_IncomeTaxExpenseBenefit	12,469us-gaap_IncomeTaxExpenseBenefit	220,705us-gaap_IncomeTaxExpenseBenefit	230,591us-gaap_IncomeTaxExpenseBenefit	237,317us-gaap_IncomeTaxExpenseBenefit
INCOME FROM CONTINUING OPERATIONS	9,535	248,086	141,384	24,691	32,814	234,718	139,598	32,836	423,696	439,966	418,993
Income (loss) from discontinued operations - net of income taxes									0	0	(5,829)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	5,410	243,961	132,458	15,766	24,260	226,163	131,207	24,444	397,595	406,074	381,542
Other comprehensive income									9,912	35,955	38,155
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS									407,507us-gaap_ComprehensiveIncomeNetOfTax	442,029us-gaap_ComprehensiveIncomeNetOfTax	419,697us-gaap_ComprehensiveIncomeNetOfTax
Pinnacle West
CONDENSED FINANCIAL STATEMENTS
Operating revenues									642	799	6,133
Operating expenses									23,507	24,930	12,125
OPERATING INCOME									(22,865)	(24,131)	(5,992)
Other
Equity in earnings of subsidiaries									411,528	420,926	391,528
Other expense									(3,276)	(1,999)	(2,001)
Total									408,252	418,927	389,527
Interest expense									3,663	3,226	4,868
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									381,724	391,570	378,667
Income tax benefit									(15,871)	(14,504)	(7,079)
INCOME FROM CONTINUING OPERATIONS									397,595	406,074	385,746
Income (loss) from discontinued operations - net of income taxes										0	(4,204)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS									397,595	406,074	381,542
Other comprehensive income									9,912	35,955	38,155
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS									$ 407,507	$ 442,029	$ 419,697