$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw

$pnw Overview Financials Valuation SEC Filings Company Website

2018 Q2 Form 10-Q Financial Statement

#000076462218000052 Filed on August 03, 2018

Income Statement

Concept	2018 Q2	2017 Q2
Revenue	$974.1M	$944.6M
YoY Change	3.13%	3.19%
Cost Of Revenue	$257.1M	$254.6M
YoY Change	0.97%	-7.36%
Gross Profit	$717.0M	$690.0M
YoY Change	3.92%	7.72%
Gross Profit Margin	73.61%	73.05%
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$162.0M	$143.4M
YoY Change	12.97%	1.34%
% of Gross Profit	22.59%	20.78%
Operating Expenses	$735.4M	$652.7M
YoY Change	12.67%	-12.33%
Operating Profit	$242.2M	$297.3M
YoY Change	-18.53%	28.27%
Interest Expense	$54.42M	$50.06M
YoY Change	8.7%	5.29%
% of Operating Profit	22.47%	16.84%
Other Income/Expense, Net	$27.91M	$14.09M
YoY Change	98.06%	82.42%
Pretax Income	$215.7M	$261.3M
YoY Change	-17.46%	36.14%
Income Tax	$44.04M	$88.97M
% Of Pretax Income	20.42%	34.05%
Net Earnings	$171.6M	$172.3M
YoY Change	-0.41%	36.56%
Net Earnings / Revenue	17.62%	18.24%
Basic Earnings Per Share	$1.49	$1.50
Diluted Earnings Per Share	$1.48	$1.49
COMMON SHARES
Basic Shares Outstanding	112.1M shares	111.8M shares
Diluted Shares Outstanding	112.5M shares	112.3M shares

Balance Sheet

Concept	2018 Q2	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$4.000M	$5.000M
YoY Change	-20.0%	-88.37%
Cash & Equivalents	$3.839M	$4.953M
Short-Term Investments
Other Short-Term Assets	$45.87M	$45.30M
YoY Change	1.25%	5.4%
Inventory	$311.0M	$288.0M
Prepaid Expenses
Receivables	$317.0M	$291.0M
Other Receivables	$0.00	$4.000M
Total Short-Term Assets	$1.119B	$1.068B
YoY Change	4.73%	10.88%
LONG-TERM ASSETS
Property, Plant & Equipment	$12.08B	$11.28B
YoY Change	7.16%	3.16%
Goodwill
YoY Change
Intangibles	$257.0M	$265.9M
YoY Change	-3.34%	144.53%
Long-Term Investments
YoY Change
Other Assets	$59.14M	$71.12M
YoY Change	-16.85%	30.73%
Total Long-Term Assets	$16.37B	$15.60B
YoY Change	4.95%	7.04%
TOTAL ASSETS
Total Short-Term Assets	$1.119B	$1.068B
Total Long-Term Assets	$16.37B	$15.60B
Total Assets	$17.49B	$16.67B
YoY Change	4.93%	7.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$260.3M	$270.3M
YoY Change	-3.69%	-14.63%
Accrued Expenses	$56.00M	$53.00M
YoY Change	5.66%	-8.62%
Deferred Revenue
YoY Change
Short-Term Debt	$616.2M	$482.0M
YoY Change	27.85%	651.48%
Long-Term Debt Due	$600.0M	$207.0M
YoY Change	189.86%	-29.59%
Total Short-Term Liabilities	$2.239B	$1.639B
YoY Change	36.63%	10.82%
LONG-TERM LIABILITIES
Long-Term Debt	$4.192B	$4.193B
YoY Change	-0.02%	7.56%
Other Long-Term Liabilities	$168.1M	$168.9M
YoY Change	-0.51%	-14.69%
Total Long-Term Liabilities	$4.360B	$4.361B
YoY Change	-0.04%	6.48%
TOTAL LIABILITIES
Total Short-Term Liabilities	$2.239B	$1.639B
Total Long-Term Liabilities	$4.360B	$4.361B
Total Liabilities	$6.598B	$6.000B
YoY Change	9.97%	7.64%
SHAREHOLDERS EQUITY
Retained Earnings	$2.465B	$2.300B
YoY Change	7.19%	10.6%
Common Stock	$2.625B	$2.604B
YoY Change	0.78%	2.16%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$1.431M	$1.553M
YoY Change	-7.86%	1094.62%
Treasury Stock Shares	17.63K shares	19.30K shares
Shareholders Equity	$5.032B	$4.859B
YoY Change
Total Liabilities & Shareholders Equity	$17.49B	$16.67B
YoY Change	4.93%	7.28%

Cashflow Statement

Concept	2018 Q2	2017 Q2
OPERATING ACTIVITIES
Net Income	$171.6M	$172.3M
YoY Change	-0.41%	36.56%
Depreciation, Depletion And Amortization	$162.0M	$143.4M
YoY Change	12.97%	1.34%
Cash From Operating Activities	$228.9M	$150.5M
YoY Change	52.09%	-45.92%
INVESTING ACTIVITIES
Capital Expenditures	-$318.9M	-$344.8M
YoY Change	-7.51%	-2.35%
Acquisitions
YoY Change
Other Investing Activities	$1.000M	$5.300M
YoY Change	-81.13%	-47.0%
Cash From Investing Activities	-$318.0M	-$339.5M
YoY Change	-6.33%	-1.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	77.40M	191.0M
YoY Change	-59.48%	104.5%
NET CHANGE
Cash From Operating Activities	228.9M	150.5M
Cash From Investing Activities	-318.0M	-339.5M
Cash From Financing Activities	77.40M	191.0M
Net Change In Cash	-11.70M	2.000M
YoY Change	-685.0%	-92.98%
FREE CASH FLOW
Cash From Operating Activities	$228.9M	$150.5M
Capital Expenditures	-$318.9M	-$344.8M
Free Cash Flow	$547.8M	$495.3M
YoY Change	10.6%	-21.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
	dei	Document Period End Date DocumentPeriodEndDate	2018-06-30
	dei	Document Type DocumentType	10-Q
	dei	Entity Central Index Key EntityCentralIndexKey	0000764622
CY2018Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	111974139	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
CY2017Q4	pnw	Assets Fair Value Gross Liabilityand Net Pending Securities Salesand Purchases AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases	413287000	USD
CY2018Q2	pnw	Assets Fair Value Gross Liabilityand Net Pending Securities Salesand Purchases AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases	424489000	USD
	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	-4700000	USD
	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	-1082000	USD
CY2017Q4	pnw	Coal Reclamationand Union Trust CoalReclamationandUnionTrust	32542000	USD
CY2018Q2	pnw	Coal Reclamationand Union Trust CoalReclamationandUnionTrust	216338000	USD
CY2017Q4	pnw	Decommissioning Fund Investments Fair Value Net Pending Securities Salesand Purchases DecommissioningFundInvestmentsFairValueNetPendingSecuritiesSalesandPurchases	417499000	USD
CY2018Q2	pnw	Decommissioning Fund Investments Fair Value Net Pending Securities Salesand Purchases DecommissioningFundInvestmentsFairValueNetPendingSecuritiesSalesandPurchases	427199000	USD
CY2017Q4	pnw	Deferred Fuel And Purchased Power Regulatory Asset Current DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	75637000	USD
CY2018Q2	pnw	Deferred Fuel And Purchased Power Regulatory Asset Current DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	74898000	USD
	pnw	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	3194000	USD
	pnw	Deferred Investment Tax Credit DeferredInvestmentTaxCredit	2778000	USD
CY2018Q2	pnw	Defined Benefit Plan Amountof Other Postretirement Benefit Trust Assetsfor Union Employee Medical Costs DefinedBenefitPlanAmountofOtherPostretirementBenefitTrustAssetsforUnionEmployeeMedicalCosts	186000000	USD
CY2017Q2	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	4252000	USD
	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-7503000	USD
CY2018Q2	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-989000	USD
	pnw	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Derivative Gain Loss Deferred As Regulatory Asset Or Liability FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisDerivativeGainLossDeferredAsRegulatoryAssetOrLiability	-3311000	USD
	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	-13663000	USD
	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	50851000	USD
CY2017Q4	pnw	Liabilities Heldforsale Not Partof Disposal Group LiabilitiesHeldforsaleNotPartofDisposalGroup	0	USD
CY2018Q2	pnw	Liabilities Heldforsale Not Partof Disposal Group LiabilitiesHeldforsaleNotPartofDisposalGroup	26457000	USD
CY2017Q2	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	194000	USD
	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	1614000	USD
CY2018Q2	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	319000	USD
	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	1726000	USD
CY2017Q2	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	97000	USD
	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	100000	USD
CY2018Q2	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	2000	USD
	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	4000	USD
CY2017Q2	pnw	Nonoperating Costs NonoperatingCosts	3401000	USD
	pnw	Nonoperating Costs NonoperatingCosts	5360000	USD
CY2018Q2	pnw	Nonoperating Costs NonoperatingCosts	3278000	USD
	pnw	Nonoperating Costs NonoperatingCosts	4924000	USD
	pnw	Paymentsto Acquire Investmentstobe Heldin Decommissioning Trust Fund And Other Special Use Funds PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds	276505000	USD
	pnw	Paymentsto Acquire Investmentstobe Heldin Decommissioning Trust Fund And Other Special Use Funds PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds	259542000	USD
	pnw	Proceedsfrom Decommissioning Trust Fund Assets And Other Special Use Funds ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds	275364000	USD
	pnw	Proceedsfrom Decommissioning Trust Fund Assets And Other Special Use Funds ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds	258401000	USD
CY2018Q2	pnw	Public Utilities Ballot Initiative Estimated Capital Investment Increase PublicUtilitiesBallotInitiativeEstimatedCapitalInvestmentIncrease	10000000000	USD
CY2018Q2	pnw	Public Utilities Ballot Initiative Estimateof Additional Resources PublicUtilitiesBallotInitiativeEstimateofAdditionalResources	5500	MW
CY2018Q1	pnw	Public Utilities Ballot Initiative Proposed Required Energy Supply From Renewable Sources Percent PublicUtilitiesBallotInitiativeProposedRequiredEnergySupplyFromRenewableSourcesPercent	0.5
CY2018Q2	pnw	Public Utilities Ballot Initiative Statutory Fine Per Violation PublicUtilitiesBallotInitiativeStatutoryFinePerViolation	5000	USD
CY2017Q4	pnw	Regulatory Asset Including Deferred Fuel And Purchased Power Regulatory Asset Current RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	248088000	USD
CY2018Q2	pnw	Regulatory Asset Including Deferred Fuel And Purchased Power Regulatory Asset Current RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	229559000	USD
CY2017Q2	pnw	Regulatory Cost Recovery Income Debt Deferral Refunded RegulatoryCostRecoveryIncomeDebtDeferralRefunded	0	USD
	pnw	Regulatory Cost Recovery Income Debt Deferral Refunded RegulatoryCostRecoveryIncomeDebtDeferralRefunded	0	USD
CY2018Q2	pnw	Regulatory Cost Recovery Income Debt Deferral Refunded RegulatoryCostRecoveryIncomeDebtDeferralRefunded	4188000	USD
	pnw	Regulatory Cost Recovery Income Debt Deferral Refunded RegulatoryCostRecoveryIncomeDebtDeferralRefunded	6280000	USD
CY2018Q2	pnw	Regulatory Cost Recovery Revenue RegulatoryCostRecoveryRevenue	20000000	USD
	pnw	Regulatory Cost Recovery Revenue RegulatoryCostRecoveryRevenue	27000000	USD
CY2017Q4	pnw	Regulatory Liability Including Deferred Fuel And Purchased Power Regulatory Liability Current RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent	100086000	USD
CY2018Q2	pnw	Regulatory Liability Including Deferred Fuel And Purchased Power Regulatory Liability Current RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent	156757000	USD
CY2017Q4	pnw	Special Use Fund Investments Other Gross Fair Value SpecialUseFundInvestmentsOtherGrossFairValue	32542000	USD
CY2018Q2	pnw	Special Use Fund Investments Other Gross Fair Value SpecialUseFundInvestmentsOtherGrossFairValue	218540000	USD
CY2017Q4	pnw	Special Use Fund Investments Other Net Fair Value Pending Salesand Purchases SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases	525000	USD
CY2018Q2	pnw	Special Use Fund Investments Other Net Fair Value Pending Salesand Purchases SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases	1260000	USD
CY2018Q2	pnw	Special Use Fund Investments Other Reclassified Assets Held For Sale SpecialUseFundInvestmentsOtherReclassifiedAssetsHeldForSale	2000000	USD
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	pnw	Tax Cuts And Jobs Act Of2017 Reclassification From Aoci To Retained Earnings Tax Effect TaxCutsAndJobsActOf2017ReclassificationFromAOCIToRetainedEarningsTaxEffect	-8552000	USD
CY2017Q4	pnw	Total Deferred Debits TotalDeferredDebits	1601946000	USD
CY2018Q2	pnw	Total Deferred Debits TotalDeferredDebits	1421561000	USD
CY2017Q4	pnw	Total Investments And Other Assets TotalInvestmentsAndOtherAssets	955582000	USD
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CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	2513000	USD
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	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	-9378000	USD
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CY2017Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	166680000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	190951000	USD
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	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	166889000	USD
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	200698000	USD
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	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	176636000	USD
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	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	467006000	USD
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	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	454197000	USD
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	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	253366000	USD
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	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	290261000	USD
CY2017Q2	us-gaap	Costs And Expenses CostsAndExpenses	647330000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1257647000	USD
CY2018Q2	us-gaap	Costs And Expenses CostsAndExpenses	731961000	USD
	us-gaap	Costs And Expenses CostsAndExpenses	1393341000	USD
CY2017Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	112434000	USD
CY2018Q2	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	207887000	USD
CY2017Q4	us-gaap	Customer Advances For Construction CustomerAdvancesForConstruction	113996000	USD
CY2018Q2	us-gaap	Customer Advances For Construction CustomerAdvancesForConstruction	118459000	USD
CY2017Q4	us-gaap	Customer Deposits Current CustomerDepositsCurrent	70388000	USD
CY2018Q2	us-gaap	Customer Deposits Current CustomerDepositsCurrent	89681000	USD
CY2017Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	4871713000	USD
CY2018Q2	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	4791525000	USD
CY2017Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	871000000	USD
CY2018Q2	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	873643000	USD
CY2017Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	5895787000	USD
CY2018Q2	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	5902329000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	94365000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	33711000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1690805000	USD
CY2018Q2	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	1727700000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	268978000	USD
CY2018Q2	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	47619000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	291285000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	325550000	USD
CY2017Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	4737000	USD
CY2018Q2	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	3970000	USD
CY2017Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1982000	USD
CY2018Q2	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	3316000	USD
CY2017Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	1931000	USD
CY2018Q2	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	3316000	USD
CY2017Q4	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	59252000	USD
CY2018Q2	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	49096000	USD
CY2017Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	96422000	USD
CY2018Q2	us-gaap	Derivative Liabilities DerivativeLiabilities	95443000	USD
CY2017Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	37170000	USD
CY2018Q2	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	46347000	USD
CY2017Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	1516000	USD
CY2018Q2	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	2752000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	146204000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	155620000	USD
CY2017Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	77667000	USD
CY2018Q2	us-gaap	Dividends Payable Current DividendsPayableCurrent	77821000	USD
CY2017Q2	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	73113000	USD
CY2018Q2	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	77821000	USD
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.50
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.71
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.49
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.52
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.49
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.70
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.51
CY2017Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	25258000	USD
CY2018Q2	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	47591000	USD
CY2017Q2	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
CY2018Q2	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
CY2017Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	-6000	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	-6000	USD
CY2018Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Gain Loss Included In Other Comprehensive Income Loss FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInOtherComprehensiveIncomeLoss	0	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	0	USD
CY2017Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-1699000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-3122000	USD
CY2018Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-494000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Settlements FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements	-1276000	USD
CY2017Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	-4350000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	-4388000	USD
CY2018Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	-2534000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Into Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersIntoLevel3	-4979000	USD
CY2017Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-3845000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-19936000	USD
CY2018Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-13425000	USD
	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis Unobservable Inputs Reconciliation Transfers Out Of Level3 FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3	-15912000	USD
CY2016Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-47406000	USD
CY2017Q1	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-41685000	USD
CY2017Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-36245000	USD
CY2017Q4	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-18256000	USD
CY2018Q1	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-19754000	USD
CY2018Q2	us-gaap	Fair Value Net Derivative Asset Liability Measured On Recurring Basis With Unobservable Inputs FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs	-9358000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	261284000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	293680000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	215651000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	222480000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	88967000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	93178000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44039000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	42774000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2062000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	10032000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	21771000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	36614000	USD
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	11745000	USD
	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	8140000	USD
	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	71000	USD
	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	920000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	322000	USD
	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	0	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	5437000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	22970000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-44778000	USD
	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	9410000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	49162000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-24847000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	13279000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-78146000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	23418000	USD
	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-11069000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	62624000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	18672000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	50063000	USD
	us-gaap	Interest Expense InterestExpense	97455000	USD
	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-21993000	USD
	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-50112000	USD
	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	105754000	USD
	us-gaap	Increase Decrease In Unbilled Receivables IncreaseDecreaseInUnbilledReceivables	95453000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	257189000	USD
CY2018Q2	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	257040000	USD
CY2017Q2	us-gaap	Interest Costs Incurred InterestCostsIncurred	54969000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	106833000	USD
CY2018Q2	us-gaap	Interest Costs Incurred InterestCostsIncurred	60708000	USD
	us-gaap	Interest Costs Incurred InterestCostsIncurred	119662000	USD
CY2018Q2	us-gaap	Liabilities Current LiabilitiesCurrent	2238885000	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	13115000	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	54417000	USD
	us-gaap	Interest Expense InterestExpense	106616000	USD
	us-gaap	Interest Paid Net InterestPaidNet	94870000	USD
	us-gaap	Interest Paid Net InterestPaidNet	104249000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	56397000	USD
CY2018Q2	us-gaap	Interest Payable Current InterestPayableCurrent	56248000	USD
CY2017Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	387000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	864000	USD
CY2018Q2	us-gaap	Investment Income Interest InvestmentIncomeInterest	2408000	USD
	us-gaap	Investment Income Interest InvestmentIncomeInterest	4299000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	17019082000	USD
CY2018Q2	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	17492173000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1197852000	USD
CY2018Q2	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	13416000	USD
CY2017Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	5304956000	USD
CY2018Q2	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	4953048000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4789713000	USD
CY2018Q2	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4191525000	USD
CY2017Q2	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	227000	USD
	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	528000	USD
CY2018Q2	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	174000	USD
	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	350000	USD
CY2017Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	231597000	USD
CY2018Q2	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	213137000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	129040000	USD
CY2018Q2	us-gaap	Minority Interest MinorityInterest	127415000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	11372000	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	393750000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	273241000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-688240000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-2920000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-5928000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-679096000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	290562000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	395802000	USD
CY2017Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4874000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9747000	USD
CY2018Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4874000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9747000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	167443000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	190755000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	166738000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	169959000	USD
CY2017Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	14090000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	26467000	USD
CY2018Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	27906000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	55600000	USD
CY2017Q4	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	117408000	USD
CY2018Q2	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	119256000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	297257000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	364668000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	242162000	USD
	us-gaap	Operating Income Loss OperatingIncomeLoss	273496000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	48039000	USD
CY2018Q2	us-gaap	Other Assets Current OtherAssetsCurrent	45865000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	52040000	USD
CY2018Q2	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	59137000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-2150000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-6024000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-763000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	196000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4283000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3070000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1334000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	812000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	4739000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	3839000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	823000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	119000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1558000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	1115000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-564000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-1771000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-456000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-865000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	348000	USD
CY2017Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	1706000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	2094000	USD
CY2018Q2	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	7434000	USD
	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	7597000	USD
CY2017Q4	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	130666000	USD
CY2018Q2	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	140880000	USD
CY2017Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	264012000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-8000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	150000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	232000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	7000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-763000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-96000	USD
CY2017Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	4000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	679000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	0	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	96000	USD
CY2018Q2	us-gaap	Other Inventory Supplies OtherInventorySupplies	263370000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	246529000	USD
CY2018Q2	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	167202000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	148909000	USD
CY2018Q2	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	168069000	USD
CY2017Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	82000000	USD
CY2018Q2	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	600000000	USD
CY2017Q2	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	3822000	USD
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	7502000	USD
CY2018Q2	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	3771000	USD
	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	7000000	USD
CY2017Q2	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	484000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	964000	USD
CY2018Q2	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	6598000	USD
	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	10583000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2127000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4299000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	142520000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	151942000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	693626000	USD
	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	679949000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	11372000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	11372000	USD
CY2017Q2	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-6972000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-13067000	USD
CY2018Q2	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-12006000	USD
	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-24865000	USD
CY2017Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	327300000	USD
CY2018Q2	us-gaap	Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent	319604000	USD
	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	18032000	USD
	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	19339000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	251635000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	17000000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	45000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	287800000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	500849000	USD
	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	-8792000	USD
	us-gaap	Proceeds From Repurchase Of Equity ProceedsFromRepurchaseOfEquity	-2294000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	172317000	USD
	us-gaap	Profit Loss ProfitLoss	200502000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	171612000	USD
	us-gaap	Profit Loss ProfitLoss	179706000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	17798061000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	18328611000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	11669526000	USD
CY2018Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	12082802000	USD
CY2017Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	4906000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	9378000	USD
CY2018Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	6291000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	13046000	USD
CY2017Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	10456000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	19938000	USD
CY2018Q2	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	13073000	USD
	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	27152000	USD
CY2017Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	13445266000	USD
CY2018Q2	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	13802783000	USD
CY2017Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-1387000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-3116000	USD
CY2018Q2	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-1645000	USD
	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-2954000	USD
CY2017Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	172451000	USD
CY2018Q2	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	154661000	USD
CY2017Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1202302000	USD
CY2018Q2	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1233062000	USD
CY2017Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	100086000	USD
CY2018Q2	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	156757000	USD
CY2017Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	2452536000	USD
CY2018Q2	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	2389002000	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	25000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	82000000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2442511000	USD
CY2018Q2	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2465402000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	974123000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1666837000	USD
CY2017Q2	us-gaap	Revenues Revenues	944587000	USD
	us-gaap	Revenues Revenues	1622315000	USD
CY2018Q2	us-gaap	Revenues Revenues	974123000	USD
	us-gaap	Revenues Revenues	1666837000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	12891000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	13189000	USD
CY2017Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	95400000	USD
CY2018Q2	us-gaap	Short Term Borrowings ShortTermBorrowings	616249000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	8452000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	9867000	USD
	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	15021000	USD
	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	10470000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	5006690000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	5032019000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4935912000	USD
CY2017Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-42863000	USD
CY2017Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	4990077000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5135730000	USD
CY2018Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5159434000	USD
CY2017Q2	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	44289000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	88125000	USD
CY2018Q2	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	53607000	USD
	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	107207000	USD
CY2017Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	148946000	USD
CY2018Q2	us-gaap	Taxes Payable Current TaxesPayableCurrent	156362000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	64463	shares
CY2018Q2	us-gaap	Treasury Stock Shares TreasuryStockShares	17633	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	5624000	USD
CY2018Q2	us-gaap	Treasury Stock Value TreasuryStockValue	1431000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	12430000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	6277000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	222000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	0	USD
CY2017Q2	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	220985000	USD
	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	447056000	USD
CY2018Q2	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	268397000	USD
	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	534079000	USD
CY2017Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	109645000	USD
CY2018Q2	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	107710000	USD
CY2017Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112345000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112270000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112471000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112482000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111797000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	111763000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	112115000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	112067000	shares
CY2017Q2	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	548000	shares
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	507000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	356000	shares
	us-gaap	Weighted Average Number Of Shares Restricted Stock WeightedAverageNumberOfSharesRestrictedStock	415000	shares

Files In Submission

Name	View Source	Status
0000764622-18-000052-index-headers.html	Edgar Link	pending
0000764622-18-000052-index.html	Edgar Link	pending
0000764622-18-000052.txt	Edgar Link	pending
0000764622-18-000052-xbrl.zip	Edgar Link	pending
cotenancyagreementref_image1.gif	Edgar Link	pending
exhibit101-063018.htm	Edgar Link	pending
exhibit10114a-063018.htm	Edgar Link	pending
exhibit102-063018.htm	Edgar Link	pending
exhibit103-063018.htm	Edgar Link	pending
exhibit104-063018.htm	Edgar Link	pending
exhibit1074c-063018.htm	Edgar Link	pending
exhibit121-063018.htm	Edgar Link	pending
exhibit122-063018.htm	Edgar Link	pending
exhibit123-063018.htm	Edgar Link	pending
exhibit311-063018.htm	Edgar Link	pending
exhibit312-063018.htm	Edgar Link	pending
exhibit313-063018.htm	Edgar Link	pending
exhibit314-063018.htm	Edgar Link	pending
exhibit321-063018.htm	Edgar Link	pending
exhibit322-063018.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
fourcornerspurchasean_image1.jpg	Edgar Link	pending
fourcornerspurchasean_image2.jpg	Edgar Link	pending
pnw-20180630.xml	Edgar Link	completed
pnw-20180630.xsd	Edgar Link	pending
pnw-20180630_cal.xml	Edgar Link	unprocessable
pnw-20180630_def.xml	Edgar Link	unprocessable
pnw-20180630_lab.xml	Edgar Link	unprocessable
pnw-20180630_pre.xml	Edgar Link	unprocessable
pnw-6301810q.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
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R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw

2018 Q2 Form 10-Q Financial Statement

#000076462218000052 Filed on August 03, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PNW PINNACLE WEST CAPITAL CORP Stock $pnw

2018 Q2 Form 10-Q Financial Statement

#000076462218000052 Filed on August 03, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw