$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw

$pnw Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-Q Financial Statement

#000076462217000074 Filed on November 03, 2017

Income Statement

Concept	2017 Q4	2017 Q3	2016 Q3
Revenue	$759.7M	$1.183B	$1.167B
YoY Change	2.77%	1.41%	-2.69%
Cost Of Revenue		$310.5M	$336.1M
YoY Change		-7.63%	-7.62%
Gross Profit		$872.9M	$830.8M
YoY Change		5.06%	-0.54%
Gross Profit Margin		73.76%	71.2%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$164.9M	$154.4M	$140.6M
YoY Change	16.05%	9.82%	-3.63%
% of Gross Profit		17.69%	16.92%
Operating Expenses	$650.3M	$717.7M	$680.6M
YoY Change	0.46%	5.45%	-3.2%
Operating Profit	$85.55M	$459.5M	$451.3M
YoY Change	-30.35%	1.84%	1.38%
Interest Expense	-$61.70M	$49.64M	$46.97M
YoY Change	1662.86%	5.69%	2.51%
% of Operating Profit	-72.12%	10.8%	10.41%
Other Income/Expense, Net	-$400.0K	$15.36M	$5.060M
YoY Change	-86.67%	203.56%	125.29%
Pretax Income	$47.30M	$425.3M	$409.3M
YoY Change	-44.61%	3.89%	1.95%
Income Tax	$20.78M	$144.3M	$141.4M
% Of Pretax Income	43.92%	33.94%	34.55%
Net Earnings	$26.50M	$280.9M	$267.9M
YoY Change	-54.4%	4.87%	2.26%
Net Earnings / Revenue	3.49%	23.74%	22.96%
Basic Earnings Per Share	$0.19	$2.47	$2.36
Diluted Earnings Per Share	$0.19	$2.46	$2.35
COMMON SHARES
Basic Shares Outstanding	111.7M shares	111.8M shares	111.4M shares
Diluted Shares Outstanding		112.4M shares	112.1M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$14.00M	$11.00M	$48.00M
YoY Change	55.56%	-77.08%	269.23%
Cash & Equivalents	$13.89M	$10.67M	$48.27M
Short-Term Investments
Other Short-Term Assets	$48.04M	$45.91M	$43.28M
YoY Change	6.69%	6.06%	12.6%
Inventory	$289.0M	$284.0M	$286.0M
Prepaid Expenses
Receivables	$303.0M	$423.0M	$321.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.016B	$1.174B	$977.5M
YoY Change	23.6%	20.12%	-7.96%
LONG-TERM ASSETS
Property, Plant & Equipment	$11.67B	$11.27B	$10.98B
YoY Change	2.62%	2.65%	4.99%
Goodwill
YoY Change
Intangibles	$257.2M	$256.2M	$96.79M
YoY Change	185.7%	164.7%	-28.27%
Long-Term Investments
YoY Change
Other Assets	$52.04M	$88.82M	$68.98M
YoY Change	-24.65%	28.76%	31.42%
Total Long-Term Assets	$16.00B	$15.80B	$14.83B
YoY Change	5.41%	6.58%	7.35%
TOTAL ASSETS
Total Short-Term Assets	$1.016B	$1.174B	$977.5M
Total Long-Term Assets	$16.00B	$15.80B	$14.83B
Total Assets	$17.02B	$16.98B	$15.81B
YoY Change	6.34%	7.42%	6.26%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$256.4M	$236.7M	$248.1M
YoY Change	-3.09%	-4.59%	6.05%
Accrued Expenses	$56.00M	$49.00M	$46.00M
YoY Change	5.66%	6.52%	15.0%
Deferred Revenue	$70.39M
YoY Change
Short-Term Debt	$95.40M	$131.4M	$117.3M
YoY Change	-46.16%	12.02%	105.79%
Long-Term Debt Due	$82.00M	$207.0M	$17.00M
YoY Change	-34.4%	1117.65%	-95.86%
Total Short-Term Liabilities	$1.198B	$1.303B	$1.110B
YoY Change	-7.35%	17.43%	-27.15%
LONG-TERM LIABILITIES
Long-Term Debt	$4.790B	$4.491B	$4.145B
YoY Change	19.09%	8.34%	27.26%
Other Long-Term Liabilities	$148.9M	$158.4M	$190.3M
YoY Change	-5.02%	-16.77%	3.4%
Total Long-Term Liabilities	$4.939B	$4.649B	$4.336B
YoY Change	18.19%	7.24%	25.99%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.198B	$1.303B	$1.110B
Total Long-Term Liabilities	$4.939B	$4.649B	$4.336B
Total Liabilities	$6.136B	$5.953B	$5.445B
YoY Change	12.15%	9.31%	9.68%
SHAREHOLDERS EQUITY
Retained Earnings	$2.443B	$2.576B	$2.343B
YoY Change	8.29%	9.97%	6.95%
Common Stock	$2.615B	$2.609B	$2.553B
YoY Change	0.72%	2.19%	0.95%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$5.624M	$833.0K	$130.0K
YoY Change	36.08%	540.77%	-92.63%
Treasury Stock Shares	64.46K shares	9.864K shares	1.900K shares
Shareholders Equity	$5.007B	$5.142B	$4.853B
YoY Change
Total Liabilities & Shareholders Equity	$17.02B	$16.98B	$15.81B
YoY Change	6.34%	7.42%	6.26%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2016 Q3
OPERATING ACTIVITIES
Net Income	$26.50M	$280.9M	$267.9M
YoY Change	-54.4%	4.87%	2.26%
Depreciation, Depletion And Amortization	$164.9M	$154.4M	$140.6M
YoY Change	16.05%	9.82%	-3.63%
Cash From Operating Activities	$346.1M	$481.3M	$342.6M
YoY Change	33.99%	40.48%	-19.78%
INVESTING ACTIVITIES
Capital Expenditures	-$381.0M	-$334.2M	-$283.3M
YoY Change	46.2%	17.97%	14.37%
Acquisitions
YoY Change
Other Investing Activities	-$7.900M	-$17.30M	-$11.80M
YoY Change	-141.58%	46.61%	-24.36%
Cash From Investing Activities	-$388.9M	-$351.4M	-$295.0M
YoY Change	60.97%	19.12%	12.04%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	46.00M	-124.3M	-42.30M
YoY Change	-182.0%	193.85%	-74.27%
NET CHANGE
Cash From Operating Activities	346.1M	481.3M	342.6M
Cash From Investing Activities	-388.9M	-351.4M	-295.0M
Cash From Financing Activities	46.00M	-124.3M	-42.30M
Net Change In Cash	3.200M	5.600M	5.300M
YoY Change	-108.12%	5.66%	-983.33%
FREE CASH FLOW
Cash From Operating Activities	$346.1M	$481.3M	$342.6M
Capital Expenditures	-$381.0M	-$334.2M	-$283.3M
Free Cash Flow	$727.1M	$815.5M	$625.9M
YoY Change	40.12%	30.29%	-7.25%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Period End Date DocumentPeriodEndDate	2017-09-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000764622
CY2017Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	111729775	shares
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
	dei	Entity Registrant Name EntityRegistrantName	PINNACLE WEST CAPITAL CORP
	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	18085000	USD
	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	-1625000	USD
	pnw	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	4293000	USD
CY2016Q4	pnw	Deferred Fuel And Purchased Power Regulatory Asset Current DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	12465000	USD
CY2017Q3	pnw	Deferred Fuel And Purchased Power Regulatory Asset Current DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	73966000	USD
	pnw	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	6342000	USD
CY2017Q3	pnw	Defined Benefit Plan Amountof Other Postretirement Benefit Trust Assetsfor Union Employee Medical Costs DefinedBenefitPlanAmountofOtherPostretirementBenefitTrustAssetsforUnionEmployeeMedicalCosts	145000000	USD
CY2016Q3	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-13499000	USD
	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-21103000	USD
CY2017Q3	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-3769000	USD
	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-11272000	USD
	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	28366000	USD
	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	-18153000	USD
CY2016Q3	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	2253000	USD
	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	3941000	USD
CY2017Q3	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	2784000	USD
	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	4398000	USD
CY2016Q3	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	6000	USD
	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	2000	USD
CY2017Q3	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	55000	USD
	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	154000	USD
CY2016Q3	pnw	Nonoperating Costs NonoperatingCosts	2502000	USD
	pnw	Nonoperating Costs NonoperatingCosts	6636000	USD
CY2017Q3	pnw	Nonoperating Costs NonoperatingCosts	1978000	USD
	pnw	Nonoperating Costs NonoperatingCosts	7338000	USD
CY2016Q4	pnw	Regulatory Asset Including Deferred Fuel And Purchased Power Regulatory Asset Current RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	106875000	USD
CY2017Q3	pnw	Regulatory Asset Including Deferred Fuel And Purchased Power Regulatory Asset Current RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	258317000	USD
CY2016Q4	pnw	Regulatory Liability Including Deferred Fuel And Purchased Power Regulatory Liability Current RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent	99899000	USD
CY2017Q3	pnw	Regulatory Liability Including Deferred Fuel And Purchased Power Regulatory Liability Current RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent	120671000	USD
CY2016Q4	pnw	Total Deferred Debits TotalDeferredDebits	1619108000	USD
CY2017Q3	pnw	Total Deferred Debits TotalDeferredDebits	1716573000	USD
CY2016Q4	pnw	Total Investments And Other Assets TotalInvestmentsAndOtherAssets	848650000	USD
CY2017Q3	pnw	Total Investments And Other Assets TotalInvestmentsAndOtherAssets	932490000	USD
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	264631000	USD
CY2017Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	236746000	USD
CY2016Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	250491000	USD
CY2017Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	425558000	USD
CY2016Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	210162000	USD
CY2017Q3	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	205870000	USD
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CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3037000	USD
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	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	-14848000	USD
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CY2016Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	9135000	USD
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CY2016Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	11076000	USD
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	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	91315000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	93031000	USD
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CY2016Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	48267000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	8881000	USD
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	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	8779000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	1793000	USD
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CY2017Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
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CY2016Q4	us-gaap	Common Stock No Par Value CommonStockNoParValue
CY2017Q3	us-gaap	Common Stock No Par Value CommonStockNoParValue
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CY2017Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
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CY2016Q4	us-gaap	Common Stock Value CommonStockValue	2596030000	USD
CY2017Q3	us-gaap	Common Stock Value CommonStockValue	2608825000	USD
CY2016Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	2591897000	USD
CY2017Q3	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	358000	USD
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	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	391390000	USD
CY2017Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	277581000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	468532000	USD
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	406010000	USD
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CY2016Q3	us-gaap	Cost Of Goods Sold Electric CostOfGoodsSoldElectric	336120000	USD
	us-gaap	Cost Of Goods Sold Electric CostOfGoodsSoldElectric	832253000	USD
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	us-gaap	Cost Of Goods Sold Electric CostOfGoodsSoldElectric	777475000	USD
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	us-gaap	Cost Of Services Depreciation And Amortization CostOfServicesDepreciationAndAmortization	362977000	USD
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	us-gaap	Costs And Expenses CostsAndExpenses	2026315000	USD
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	us-gaap	Costs And Expenses CostsAndExpenses	1961820000	USD
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	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	194915000	USD
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CY2017Q3	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	50469000	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	420000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-1030000	USD
CY2017Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-5632000	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	1343000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	1725000	USD
CY2016Q4	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	1000	USD
CY2017Q3	us-gaap	Derivative Instruments And Hedges Noncurrent DerivativeInstrumentsAndHedgesNoncurrent	1692000	USD
CY2016Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	47238000	USD
CY2017Q3	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	35775000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	138947000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	146204000	USD
CY2016Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	72926000	USD
CY2017Q3	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	USD
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.36
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.49
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.47
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.18
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.35
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.47
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.46
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.16
CY2016Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	28608000	USD
CY2017Q3	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	27013000	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2017Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Change In Unrealized Gain Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisChangeInUnrealizedGainLoss	0	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	-10000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	94000	USD
CY2017Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	-4000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	-10000	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-5424000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-11691000	USD
CY2017Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-1733000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-4855000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-25568000	USD
CY2015Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-32979000	USD
CY2016Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-32380000	USD
CY2016Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-39542000	USD
CY2016Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-47406000	USD
CY2017Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-36245000	USD
CY2017Q3	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-38605000	USD
CY2016Q3	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	0	USD
	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	13000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2141000	USD
CY2017Q3	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	119000	USD
	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	119000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	409346000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	612510000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	425264000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	718944000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	141446000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	209102000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	144319000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	237497000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2562000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2185000	USD
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	3751000	USD
CY2017Q3	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-57237000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-24258000	USD
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	80925000	USD
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	89827000	USD
	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-517000	USD
	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	1826000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-589000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-3751000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	4438000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1881000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-12383000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	3936000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	59589000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	59963000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-52427000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-25180000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	11665000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	22043000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	77908000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	206920000	USD
	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-46185000	USD
	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-43348000	USD
	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	54291000	USD
	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	44027000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	90022000	USD
CY2017Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	256198000	USD
CY2016Q3	us-gaap	Interest Costs Incurred InterestCostsIncurred	51293000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	154886000	USD
CY2017Q3	us-gaap	Interest Costs Incurred InterestCostsIncurred	55644000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	162477000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	46972000	USD
	us-gaap	Interest Expense InterestExpense	140037000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	49644000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	771924000	USD
CY2016Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4873000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	263027000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	388788000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14620000	USD
	us-gaap	Interest Expense InterestExpense	147099000	USD
	us-gaap	Interest Paid Net InterestPaidNet	146691000	USD
	us-gaap	Interest Paid Net InterestPaidNet	147149000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	52835000	USD
CY2017Q3	us-gaap	Interest Payable Current InterestPayableCurrent	49218000	USD
CY2016Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	65000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	370000	USD
CY2017Q3	us-gaap	Investment Income Interest InvestmentIncomeInterest	917000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	1782000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	16004253000	USD
CY2017Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	16977867000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1292946000	USD
CY2017Q3	us-gaap	Liabilities Current LiabilitiesCurrent	1303143000	USD
CY2016Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	58482000	USD
CY2017Q3	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	42077000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	10046000	USD
CY2017Q3	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	12943000	USD
CY2016Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	4425789000	USD
CY2017Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	5063258000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4021785000	USD
CY2017Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4491048000	USD
CY2016Q3	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	450000	USD
	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	1508000	USD
CY2017Q3	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	231000	USD
	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	759000	USD
CY2016Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	221910000	USD
CY2017Q3	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	238634000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	132290000	USD
CY2017Q3	us-gaap	Minority Interest MinorityInterest	135539000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	11371000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	11372000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	254195000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	269508000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1010466000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1039639000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	765050000	USD
CY2017Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4873000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14620000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	276072000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	466827000	USD
CY2016Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	5060000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	19379000	USD
CY2017Q3	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	8826000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	22226000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	684000	USD
CY2016Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	264000	USD
CY2016Q4	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	119004000	USD
CY2017Q3	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	135460000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	451258000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	733168000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	466082000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	843817000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	45028000	USD
CY2017Q3	us-gaap	Other Assets Current OtherAssetsCurrent	45905000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	69063000	USD
CY2017Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	88818000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1573000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2602000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1509000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1705000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-804000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-633000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-790000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	21000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-504000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-709000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-487000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-369000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-798000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2564000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-710000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2480000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-500000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-691000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-438000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-430000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-29000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-595000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	9000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-754000	USD
CY2016Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-18000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	608000	USD
CY2017Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	5000	USD
CY2017Q3	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	3385000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	5479000	USD
CY2016Q4	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	139474000	USD
CY2017Q3	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	141647000	USD
CY2016Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	253979000	USD
CY2017Q3	us-gaap	Other Inventory Supplies OtherInventorySupplies	257455000	USD
	us-gaap	Proceeds From Decommissioning Fund ProceedsFromDecommissioningFund	351860000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	693151000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	549478000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	34000000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	23000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	1000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1000	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	244000000	USD
CY2017Q3	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	207599000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	156784000	USD
CY2017Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	158354000	USD
CY2016Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	125000000	USD
CY2017Q3	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	207000000	USD
CY2016Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	5205000	USD
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	12085000	USD
CY2017Q3	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	4993000	USD
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	12495000	USD
CY2016Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	71000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	385000	USD
CY2017Q3	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1091000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2055000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	18353000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	20291000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	203115000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	213927000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1014910000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1027753000	USD
	us-gaap	Payments To Invest In Decommissioning Fund PaymentsToInvestInDecommissioningFund	449129000	USD
	us-gaap	Payments To Invest In Decommissioning Fund PaymentsToInvestInDecommissioningFund	353001000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	11372000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	11372000	USD
CY2016Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	509310000	USD
CY2017Q3	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	409871000	USD
	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	39355000	USD
	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	24924000	USD
	us-gaap	Proceeds From Decommissioning Fund ProceedsFromDecommissioningFund	447419000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	83300000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-68800000	USD
	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	11790000	USD
	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	-8870000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	267900000	USD
	us-gaap	Profit Loss ProfitLoss	403408000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	280945000	USD
	us-gaap	Profit Loss ProfitLoss	481447000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	17341888000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	17310294000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	11311000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	4803622000	USD
CY2017Q3	us-gaap	Stockholders Equity StockholdersEquity	5142068000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11371788000	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11272827000	USD
CY2016Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	4321000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	14849000	USD
CY2017Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6000000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	15378000	USD
CY2016Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	10194000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	31079000	USD
CY2017Q3	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	12728000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	32666000	USD
CY2016Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	12714276000	USD
CY2017Q3	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	13154599000	USD
CY2016Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	94410000	USD
CY2017Q3	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	184351000	USD
CY2016Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1313428000	USD
CY2017Q3	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1381179000	USD
CY2016Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	99899000	USD
CY2017Q3	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	120671000	USD
CY2016Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	948916000	USD
CY2017Q3	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	891715000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	353560000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2255547000	USD
CY2017Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2576193000	USD
CY2016Q3	us-gaap	Sales Revenue Net SalesRevenueNet	1166922000	USD
	us-gaap	Sales Revenue Net SalesRevenueNet	2759483000	USD
CY2017Q3	us-gaap	Sales Revenue Net SalesRevenueNet	1183322000	USD
	us-gaap	Sales Revenue Net SalesRevenueNet	2805637000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	27588000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	16553000	USD
CY2016Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	177200000	USD
CY2017Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	131400000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	12795000	USD
	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	10555000	USD
	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	16288000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4719457000	USD
CY2016Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4992135000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4935912000	USD
CY2017Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5277607000	USD
CY2016Q3	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	41284000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	125902000	USD
CY2017Q3	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	45169000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	133294000	USD
CY2016Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	138964000	USD
CY2017Q3	us-gaap	Taxes Payable Current TaxesPayableCurrent	228791000	USD
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	55317	shares
CY2017Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	9864	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	4133000	USD
CY2017Q3	us-gaap	Treasury Stock Value TreasuryStockValue	833000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4880000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	12964000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	278000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	254000	USD
	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	1628000	USD
	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	5891000	USD
CY2017Q3	us-gaap	Unrecorded Unconditional Purchase Obligation Change Of Amount As Result Of Variable Components UnrecordedUnconditionalPurchaseObligationChangeOfAmountAsResultOfVariableComponents	-1000000000	USD
CY2016Q3	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	217568000	USD
	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	703042000	USD
CY2017Q3	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	224305000	USD
	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	658294000	USD
CY2016Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	113515000	USD
CY2017Q3	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	110613000	USD
CY2016Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112100000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	111987000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112401000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112314000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111416000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111363000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111835000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111787000	shares
CY2016Q3	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	684000	shares
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	624000	shares
CY2017Q3	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	566000	shares
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	527000	shares

Files In Submission

Name	View Source	Status
0000764622-17-000074-index-headers.html	Edgar Link	pending
0000764622-17-000074-index.html	Edgar Link	pending
0000764622-17-000074.txt	Edgar Link	pending
0000764622-17-000074-xbrl.zip	Edgar Link	pending
exhibit121-93017.htm	Edgar Link	pending
exhibit122-93017.htm	Edgar Link	pending
exhibit123-93017.htm	Edgar Link	pending
exhibit311-093017.htm	Edgar Link	pending
exhibit312-093017.htm	Edgar Link	pending
exhibit313-093017.htm	Edgar Link	pending
exhibit314-093017.htm	Edgar Link	pending
exhibit321-093017.htm	Edgar Link	pending
exhibit322-093017.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
pnw-20170930.xml	Edgar Link	completed
pnw-20170930.xsd	Edgar Link	pending
pnw-20170930_cal.xml	Edgar Link	unprocessable
pnw-20170930_def.xml	Edgar Link	unprocessable
pnw-20170930_lab.xml	Edgar Link	unprocessable
pnw-20170930_pre.xml	Edgar Link	unprocessable
pnw-9301710q.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw

2017 Q4 Form 10-Q Financial Statement

#000076462217000074 Filed on November 03, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PNW PINNACLE WEST CAPITAL CORP Stock $pnw

2017 Q4 Form 10-Q Financial Statement

#000076462217000074 Filed on November 03, 2017

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw