$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw

$pnw Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000076462222000014 Filed on February 25, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$798.9M	$3.804B	$741.0M
YoY Change	7.81%	6.05%	10.53%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$186.8M	$719.1M	$170.6M
YoY Change	9.5%	4.79%	4.47%
% of Gross Profit
Operating Expenses	$748.8M	$2.999B	$710.1M
YoY Change	5.46%	7.14%	5.42%
Operating Profit		$805.3M
YoY Change		2.18%
Interest Expense	-$47.16M	$233.3M	-$46.90M
YoY Change	0.55%	1.87%	48.89%
% of Operating Profit		28.97%
Other Income/Expense, Net	$25.04M	$174.0M	-$18.40M
YoY Change	-236.1%	95.39%	-222.67%
Pretax Income	$27.90M	$746.0M	-$34.40M
YoY Change	-181.11%	15.09%	74.62%
Income Tax	$32.57M	$110.1M	$30.60M
% Of Pretax Income	116.73%	14.76%
Net Earnings	$27.58M	$635.9M	-$19.40M
YoY Change	-242.19%	11.56%	-128.18%
Net Earnings / Revenue	3.45%	16.72%	-2.62%
Basic Earnings Per Share		$5.48
Diluted Earnings Per Share	$243.6K	$5.47	-$172.1K
COMMON SHARES
Basic Shares Outstanding	112.8M shares	112.9M shares	112.6M shares
Diluted Shares Outstanding		113.2M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$9.969M	$9.969M	$60.00M
YoY Change	-83.39%	-83.39%	500.0%
Cash & Equivalents	$9.969M	$9.969M	$59.97M
Short-Term Investments
Other Short-Term Assets	$83.90M	$799.9M	$76.63M
YoY Change	9.49%	59.02%	23.68%
Inventory	$367.2M	$367.2M	$334.0M
Prepaid Expenses
Receivables	$366.6M	$366.6M	$294.0M
Other Receivables	$7.514M	$7.514M	$7.000M
Total Short-Term Assets	$1.551B	$1.551B	$1.198B
YoY Change	29.44%	29.47%	16.34%
LONG-TERM ASSETS
Property, Plant & Equipment	$14.18B	$16.60B	$13.73B
YoY Change	3.33%	7.95%	4.01%
Goodwill
YoY Change
Intangibles	$273.7M		$282.6M
YoY Change	-3.14%		-2.75%
Long-Term Investments
YoY Change
Other Assets	$97.88M	$3.575B	$91.10M
YoY Change	7.44%	13.19%	-6.03%
Total Long-Term Assets	$20.45B	$20.45B	$18.82B
YoY Change	8.66%	8.66%	7.87%
TOTAL ASSETS
Total Short-Term Assets	$1.551B	$1.551B	$1.198B
Total Long-Term Assets	$20.45B	$20.45B	$18.82B
Total Assets	$22.00B	$22.00B	$20.02B
YoY Change	9.9%	9.91%	8.34%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$393.1M	$393.1M	$318.6M
YoY Change	23.38%	23.22%	-8.04%
Accrued Expenses	$157.8M	$157.8M	$132.0M
YoY Change	19.53%	19.53%	100.0%
Deferred Revenue	$42.29M		$48.34M
YoY Change	-12.51%		-25.53%
Short-Term Debt	$292.0M	$292.0M	$169.0M
YoY Change	72.78%	72.78%	47.37%
Long-Term Debt Due	$150.0M	$150.0M	$0.00
YoY Change			-100.0%
Total Short-Term Liabilities	$1.757B	$1.757B	$1.360B
YoY Change	29.14%	29.18%	-34.54%
LONG-TERM LIABILITIES
Long-Term Debt	$6.914B	$6.914B	$6.314B
YoY Change	9.49%	9.5%	30.66%
Other Long-Term Liabilities	$232.9M	$4.813B	$190.6M
YoY Change	22.17%	12.82%	19.27%
Total Long-Term Liabilities	$7.147B	$11.73B	$6.505B
YoY Change	9.87%	10.84%	30.3%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.757B	$1.757B	$1.360B
Total Long-Term Liabilities	$7.147B	$11.73B	$6.505B
Total Liabilities	$8.904B	$16.10B	$7.865B
YoY Change	13.2%	11.89%	11.24%
SHAREHOLDERS EQUITY
Retained Earnings	$3.265B		$3.025B
YoY Change	7.92%		6.61%
Common Stock	$2.703B		$2.677B
YoY Change	0.94%		0.67%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$6.401M		$6.289M
YoY Change	1.78%		-33.29%
Treasury Stock Shares	87.61K shares		72.01K shares
Shareholders Equity	$5.906B	$5.906B	$5.634B
YoY Change
Total Liabilities & Shareholders Equity	$22.00B	$22.00B	$20.02B
YoY Change	9.9%	9.91%	8.34%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	$27.58M	$635.9M	-$19.40M
YoY Change	-242.19%	11.56%	-128.18%
Depreciation, Depletion And Amortization	$186.8M	$719.1M	$170.6M
YoY Change	9.5%	4.79%	4.47%
Cash From Operating Activities	$199.5M	$860.0M	$194.4M
YoY Change	2.62%	-11.01%	59.47%
INVESTING ACTIVITIES
Capital Expenditures	-$467.0M	-$1.473B	-$355.5M
YoY Change	31.38%	11.07%	6.6%
Acquisitions
YoY Change
Other Investing Activities	$42.43M	-$6.458M	$33.30M
YoY Change	27.41%	-18.08%	-3.76%
Cash From Investing Activities	-$424.6M	-$1.387B	-$322.3M
YoY Change	31.75%	8.54%	7.79%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		-$2.350M
YoY Change		69.19%
Debt Paid & Issued, Net		$0.00
YoY Change		-100.0%
Cash From Financing Activities	209.4M	$476.9M	6.000M
YoY Change	3389.95%	32.06%	-96.19%
NET CHANGE
Cash From Operating Activities	199.5M	$860.0M	194.4M
Cash From Investing Activities	-424.6M	-$1.387B	-322.3M
Cash From Financing Activities	209.4M	$476.9M	6.000M
Net Change In Cash	-15.72M	-$50.00M	-121.9M
YoY Change	-87.11%	-200.63%	521.94%
FREE CASH FLOW
Cash From Operating Activities	$199.5M	$860.0M	$194.4M
Capital Expenditures	-$467.0M	-$1.473B	-$355.5M
Free Cash Flow	$666.5M	$2.333B	$549.9M
YoY Change	21.21%	1.77%	20.75%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0000764622
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	1-8962
CY2021	dei	Entity Registrant Name EntityRegistrantName	PINNACLE WEST CAPITAL CORPORATION
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	86-0512431
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	AZ
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	400 North Fifth Street, P.O. Box 53999
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	Phoenix
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	AZ
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	85072-3999
CY2021	dei	City Area Code CityAreaCode	(602)
CY2021	dei	Local Phone Number LocalPhoneNumber	250-1000
CY2021	dei	Security12b Title Security12bTitle	Common Stock,No Par Value
CY2021	dei	Trading Symbol TradingSymbol	PNW
CY2021	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	9024891205	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	112931929	shares
CY2021	dei	Auditor Firm AuditorFirmId	34
CY2021	dei	Auditor Name AuditorName	Deloitte & Touche LLP
CY2021	dei	Auditor Location AuditorLocation	Phoenix, Arizona
CY2021	us-gaap	Revenues Revenues	3803835000	USD
CY2020	us-gaap	Revenues Revenues	3586982000	USD
CY2019	us-gaap	Revenues Revenues	3471209000	USD
CY2021	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	1152551000	USD
CY2020	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	993419000	USD
CY2019	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	1042237000	USD
CY2021	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	954067000	USD
CY2020	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	958910000	USD
CY2019	us-gaap	Utilities Operating Expense Maintenance And Operations UtilitiesOperatingExpenseMaintenanceAndOperations	941616000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold Depreciation And Amortization CostOfGoodsAndServicesSoldDepreciationAndAmortization	650875000	USD
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CY2021	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	6393000	USD
CY2021	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	234639000	USD
CY2020	us-gaap	Taxes Excluding Income And Excise Taxes TaxesExcludingIncomeAndExciseTaxes	224835000	USD
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CY2020	us-gaap	Costs And Expenses CostsAndExpenses	2798830000	USD
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CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	41737000	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	33776000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	31431000	USD
CY2021	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-112541000	USD
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CY2019	us-gaap	Pension And Other Postretirement Benefit Expense PensionAndOtherPostretirementBenefitExpense	-22989000	USD
CY2021	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	45100000	USD
CY2020	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	56703000	USD
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	50263000	USD
CY2021	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	25396000	USD
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CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	21052000	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	18530000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Additions PublicUtilitiesAllowanceForFundsUsedDuringConstructionAdditions	18528000	USD
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CY2021	us-gaap	Income Loss Including Portion Attributable To Noncontrolling Interest IncomeLossIncludingPortionAttributableToNoncontrollingInterest	746030000	USD
CY2020	us-gaap	Income Loss Including Portion Attributable To Noncontrolling Interest IncomeLossIncludingPortionAttributableToNoncontrollingInterest	648225000	USD
CY2019	us-gaap	Income Loss Including Portion Attributable To Noncontrolling Interest IncomeLossIncludingPortionAttributableToNoncontrollingInterest	542040000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110086000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78173000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15773000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	635944000	USD
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CY2019	us-gaap	Profit Loss ProfitLoss	557813000	USD
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	17224000	USD
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CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	618720000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	550559000	USD
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CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	112910000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	112666000	shares
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CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113192000	shares
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CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	626655000	USD
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CY2021Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	133980000	USD
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	132197000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	25354000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	19782000	USD
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CY2020Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	314745000	USD
CY2021Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	18032000	USD
CY2020Q4	us-gaap	Energy Related Inventory Other Fossil Fuel EnergyRelatedInventoryOtherFossilFuel	19552000	USD
CY2021Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	7514000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	6792000	USD
CY2021Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	63481000	USD
CY2020Q4	us-gaap	Derivative Instruments And Hedges DerivativeInstrumentsAndHedges	2931000	USD
CY2021Q4	pnw	Deferred Fuel And Purchased Power Regulatory Asset Current DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	388148000	USD
CY2020Q4	pnw	Deferred Fuel And Purchased Power Regulatory Asset Current DeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	175835000	USD
CY2021Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	130376000	USD
CY2020Q4	us-gaap	Regulatory Assets Current RegulatoryAssetsCurrent	115878000	USD
CY2021Q4	us-gaap	Other Assets Current OtherAssetsCurrent	83896000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	76627000	USD
CY2021Q4	us-gaap	Assets Current AssetsCurrent	1551100000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1198319000	USD
CY2021Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1294757000	USD
CY2020Q4	us-gaap	Decommissioning Trust Assets Amount DecommissioningTrustAssetsAmount	1138435000	USD
CY2021Q4	pnw	Coal Reclamationand Union Trust CoalReclamationandUnionTrust	358410000	USD
CY2020Q4	pnw	Coal Reclamationand Union Trust CoalReclamationandUnionTrust	254509000	USD
CY2021Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	46908000	USD
CY2020Q4	us-gaap	Credit Risk Derivative Assets At Fair Value CreditRiskDerivativeAssetsAtFairValue	1818000	USD
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	97884000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	91104000	USD
CY2021Q4	pnw	Total Investments And Other Assets TotalInvestmentsAndOtherAssets	1797959000	USD
CY2020Q4	pnw	Total Investments And Other Assets TotalInvestmentsAndOtherAssets	1485866000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	21688661000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	20837885000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7504603000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7110310000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	14184058000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	13727575000	USD
CY2021Q4	pnw	Construction Work In Progress Gross ConstructionWorkInProgressGross	1329478000	USD
CY2020Q4	pnw	Construction Work In Progress Gross ConstructionWorkInProgressGross	937384000	USD
CY2021Q4	us-gaap	Sale Leaseback Transaction Accumulated Depreciation SaleLeasebackTransactionAccumulatedDepreciation	256884000	USD
CY2020Q4	us-gaap	Sale Leaseback Transaction Accumulated Depreciation SaleLeasebackTransactionAccumulatedDepreciation	253014000	USD
CY2021Q4	pnw	Public Utilities Property Plant And Equipment Sale Leaseback Net PublicUtilitiesPropertyPlantAndEquipmentSaleLeasebackNet	94166000	USD
CY2020Q4	pnw	Public Utilities Property Plant And Equipment Sale Leaseback Net PublicUtilitiesPropertyPlantAndEquipmentSaleLeasebackNet	98036000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	737694000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	698500000	USD
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	273693000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	282570000	USD
CY2021Q4	pnw	Accumulated Amortization On Nuclear Fuel AccumulatedAmortizationOnNuclearFuel	133122000	USD
CY2020Q4	pnw	Accumulated Amortization On Nuclear Fuel AccumulatedAmortizationOnNuclearFuel	137207000	USD
CY2021Q4	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	106039000	USD
CY2020Q4	us-gaap	Nuclear Fuel Net Of Amortization NuclearFuelNetOfAmortization	113645000	USD
CY2021Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	15987434000	USD
CY2020Q4	us-gaap	Public Utilities Property Plant And Equipment Net PublicUtilitiesPropertyPlantAndEquipmentNet	15159210000	USD
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1192987000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1133987000	USD
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	890057000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	505064000	USD
CY2021Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	545723000	USD
CY2020Q4	us-gaap	Defined Benefit Plan Assets For Plan Benefits Noncurrent DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent	502992000	USD
CY2021Q4	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	37962000	USD
CY2020Q4	us-gaap	Other Deferred Costs Net OtherDeferredCostsNet	34983000	USD
CY2021Q4	pnw	Total Deferred Debits TotalDeferredDebits	2666729000	USD
CY2020Q4	pnw	Total Deferred Debits TotalDeferredDebits	2177026000	USD
CY2021Q4	us-gaap	Assets Assets	22003222000	USD
CY2020Q4	us-gaap	Assets Assets	20020421000	USD
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	393083000	USD
CY2020Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	318585000	USD
CY2021Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	168645000	USD
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	159551000	USD
CY2021Q4	us-gaap	Interest Payable Current InterestPayableCurrent	57332000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	56962000	USD
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	95988000	USD
CY2020Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	93531000	USD
CY2021Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	292000000	USD
CY2020Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	169000000	USD
CY2021Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	150000000	USD
CY2020Q4	us-gaap	Other Long Term Debt Current OtherLongTermDebtCurrent	0	USD
CY2021Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	42293000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	48340000	USD
CY2021Q4	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	4373000	USD
CY2020Q4	us-gaap	Derivative Instruments And Hedges Liabilities DerivativeInstrumentsAndHedgesLiabilities	7557000	USD
CY2021Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	4473000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	15586000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	100443000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	74785000	USD
CY2021Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	296271000	USD
CY2020Q4	us-gaap	Regulatory Liability Current RegulatoryLiabilityCurrent	229088000	USD
CY2021Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	151968000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	187448000	USD
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1756869000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1360433000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6913735000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6314266000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	2311862000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	2135403000	USD
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	2499213000	USD
CY2020Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	2450169000	USD
CY2021Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	762909000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	689497000	USD
CY2021Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	152865000	USD
CY2020Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	166484000	USD
CY2021Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	0	USD
CY2020Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	11062000	USD
CY2021Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	257151000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	221032000	USD
CY2021Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	174616000	USD
CY2020Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	170097000	USD
CY2021Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	186570000	USD
CY2020Q4	us-gaap	Accumulated Deferred Investment Tax Credit AccumulatedDeferredInvestmentTaxCredit	191372000	USD
CY2021Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	4657000	USD
CY2020Q4	us-gaap	Liability For Uncertain Tax Positions Noncurrent LiabilityForUncertainTaxPositionsNoncurrent	5834000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	728401000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	361336000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	232914000	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	190643000	USD
CY2021Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	7311158000	USD
CY2020Q4	us-gaap	Deferred Credits And Other Liabilities DeferredCreditsAndOtherLiabilities	6592929000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	150000000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	113014528	shares
CY2020Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	112760051	shares
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	2702743000	USD
CY2020Q4	us-gaap	Common Stock Value CommonStockValue	2677482000	USD
CY2021Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	87608	shares
CY2020Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	72006	shares
CY2021Q4	us-gaap	Treasury Stock Value TreasuryStockValue	6401000	USD
CY2020Q4	us-gaap	Treasury Stock Value TreasuryStockValue	6289000	USD
CY2021Q4	pnw	Common Stock Value Common And Treasury CommonStockValueCommonAndTreasury	2696342000	USD
CY2020Q4	pnw	Common Stock Value Common And Treasury CommonStockValueCommonAndTreasury	2671193000	USD
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3264719000	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3025106000	USD
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-54861000	USD
CY2020Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-62796000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	5906200000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	5633503000	USD
CY2021Q4	us-gaap	Minority Interest MinorityInterest	115260000	USD
CY2020Q4	us-gaap	Minority Interest MinorityInterest	119290000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6021460000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5752793000	USD
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	22003222000	USD
CY2020Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	20020421000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	635944000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	570052000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	557813000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	719141000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	686253000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	664140000	USD
CY2021	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-256871000	USD
CY2020	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-93651000	USD
CY2019	us-gaap	Increase Decrease In Regulatory Clause Revenue IncreaseDecreaseInRegulatoryClauseRevenue	-82481000	USD
CY2021	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	44557000	USD
CY2020	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	-12047000	USD
CY2019	pnw	Increase Decrease Deferred Fuel And Purchased Power Amortization IncreaseDecreaseDeferredFuelAndPurchasedPowerAmortization	49508000	USD
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	41737000	USD
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	33776000	USD
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Capitalized Cost Of Equity PublicUtilitiesAllowanceForFundsUsedDuringConstructionCapitalizedCostOfEquity	31431000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	117471000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	69469000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1479000	USD
CY2021	pnw	Deferred Investment Tax Credit Expense DeferredInvestmentTaxCreditExpense	-4802000	USD
CY2020	pnw	Deferred Investment Tax Credit Expense DeferredInvestmentTaxCreditExpense	-5096000	USD
CY2019	pnw	Deferred Investment Tax Credit Expense DeferredInvestmentTaxCreditExpense	-3938000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	18460000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	18292000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	18376000	USD
CY2021	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	72559000	USD
CY2020	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	18191000	USD
CY2019	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	12789000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	1783000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	4032000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	-9005000	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	32870000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-11623000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	51826000	USD
CY2021	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	722000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-14935000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	21727000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	22720000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	30640000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	3507000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	20267000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-6059000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	50641000	USD
CY2021	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	9094000	USD
CY2020	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	14652000	USD
CY2019	us-gaap	Increase Decrease In Accrued Taxes Payable IncreaseDecreaseInAccruedTaxesPayable	-9920000	USD
CY2021	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-52086000	USD
CY2020	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	22520000	USD
CY2019	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-84651000	USD
CY2021	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	50000	USD
CY2020	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-404000	USD
CY2019	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	247000	USD
CY2021	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	350000	USD
CY2020	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	100000	USD
CY2019	pnw	Change In Margin And Collateral Accounts Liabilities ChangeInMarginAndCollateralAccountsLiabilities	-125000	USD
CY2021	pnw	Increase Decrease In Liability For Uncertainty In Income Taxes IncreaseDecreaseInLiabilityForUncertaintyInIncomeTaxes	-568000	USD
CY2020	pnw	Increase Decrease In Liability For Uncertainty In Income Taxes IncreaseDecreaseInLiabilityForUncertaintyInIncomeTaxes	2220000	USD
CY2019	pnw	Increase Decrease In Liability For Uncertainty In Income Taxes IncreaseDecreaseInLiabilityForUncertaintyInIncomeTaxes	2704000	USD
CY2021	us-gaap	Increase Decrease In Regulatory Liabilities IncreaseDecreaseInRegulatoryLiabilities	57549000	USD
CY2020	us-gaap	Increase Decrease In Regulatory Liabilities IncreaseDecreaseInRegulatoryLiabilities	13017000	USD
CY2019	us-gaap	Increase Decrease In Regulatory Liabilities IncreaseDecreaseInRegulatoryLiabilities	124221000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	246473000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	67453000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	82895000	USD
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-29578000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-186227000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-132666000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	860014000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	966365000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	956726000	USD
CY2021	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1473475000	USD
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1326584000	USD
CY2019	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1191447000	USD
CY2021	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	105654000	USD
CY2020	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	62503000	USD
CY2019	us-gaap	Proceeds From Contribution In Aid Of Construction ProceedsFromContributionInAidOfConstruction	70693000	USD
CY2021	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	-21052000	USD
CY2020	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	-18530000	USD
CY2019	us-gaap	Allowance For Funds Used During Construction Investing Activities AllowanceForFundsUsedDuringConstructionInvestingActivities	-18528000	USD
CY2021	pnw	Proceedsfrom Decommissioning Trust Fund Assets And Other Special Use Funds ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds	1720966000	USD
CY2020	pnw	Proceedsfrom Decommissioning Trust Fund Assets And Other Special Use Funds ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds	819518000	USD
CY2019	pnw	Proceedsfrom Decommissioning Trust Fund Assets And Other Special Use Funds ProceedsfromDecommissioningTrustFundAssetsAndOtherSpecialUseFunds	719034000	USD
CY2021	pnw	Paymentsto Acquire Investmentstobe Heldin Decommissioning Trust Fund And Other Special Use Funds PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds	1725480000	USD
CY2020	pnw	Paymentsto Acquire Investmentstobe Heldin Decommissioning Trust Fund And Other Special Use Funds PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds	822608000	USD
CY2019	pnw	Paymentsto Acquire Investmentstobe Heldin Decommissioning Trust Fund And Other Special Use Funds PaymentstoAcquireInvestmentstobeHeldinDecommissioningTrustFundAndOtherSpecialUseFunds	722181000	USD
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-6458000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-7883000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-11452000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1386929000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1277818000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1130977000	USD
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	746999000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1596672000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1092188000	USD
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	915150000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	600000000	USD
CY2021	pnw	Proceeds From Repayments Of Short Term Debt Net ProceedsFromRepaymentsOfShortTermDebtNet	142000000	USD
CY2020	pnw	Proceeds From Repayments Of Short Term Debt Net ProceedsFromRepaymentsOfShortTermDebtNet	73325000	USD
CY2019	pnw	Proceeds From Repayments Of Short Term Debt Net ProceedsFromRepaymentsOfShortTermDebtNet	54275000	USD
CY2021	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	751690000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	49000000	USD
CY2021	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	19000000	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	770690000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	65000000	USD
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	369478000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	350577000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	329643000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-2350000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	-1389000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	692000	USD
CY2021	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	21255000	USD
CY2020	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	22743000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	22744000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	476916000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	361138000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	178768000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-49999000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	49685000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	4517000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	59968000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10283000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	5766000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	9969000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	59968000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	10283000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5348705000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	557813000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-9388000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.04
CY2019	us-gaap	Dividends Common Stock DividendsCommonStock	341893000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	25296000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	11202000	USD
CY2019	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	6600000	USD
CY2019	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	22743000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5553188000	USD
CY2020	us-gaap	Profit Loss ProfitLoss	570052000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-5700000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.23
CY2020	us-gaap	Dividends Common Stock DividendsCommonStock	363063000	USD
CY2020	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	17921000	USD
CY2020	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	7181000	USD
CY2020	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	10319000	USD
CY2020	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	22743000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5752793000	USD
CY2021	us-gaap	Profit Loss ProfitLoss	635944000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7935000	USD
CY2021	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.36
CY2021	us-gaap	Dividends Common Stock DividendsCommonStock	379108000	USD
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	25261000	USD
CY2021	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4655000	USD
CY2021	us-gaap	Stock Issued During Period Value Treasury Stock Reissued StockIssuedDuringPeriodValueTreasuryStockReissued	4543000	USD
CY2021	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	21255000	USD
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	-2000	USD
CY2021Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6021460000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:11.5pt;font-weight:700;line-height:120%">Accounting Records and Use of Estimates</span></div><div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:11.5pt;font-weight:400;line-height:120%"> </span></div><div style="text-indent:36pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:11.5pt;font-weight:400;line-height:120%">Our accounting records are maintained in accordance with accounting principles generally accepted in the United States of America (“GAAP”). The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.</span></div>
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	66000000	USD
CY2021	us-gaap	Cost Of Goods And Services Sold Depreciation CostOfGoodsAndServicesSoldDepreciation	575000000	USD
CY2020	us-gaap	Cost Of Goods And Services Sold Depreciation CostOfGoodsAndServicesSoldDepreciation	553000000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold Depreciation CostOfGoodsAndServicesSoldDepreciation	522000000	USD
CY2021	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0287
CY2020	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0284
CY2019	us-gaap	Public Utilities Property Plant And Equipment Disclosure Of Composite Depreciation Rate For Plants In Service PublicUtilitiesPropertyPlantAndEquipmentDisclosureOfCompositeDepreciationRateForPlantsInService	0.0281
CY2021	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.0675
CY2020	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.0672
CY2019	us-gaap	Public Utilities Allowance For Funds Used During Construction Rate PublicUtilitiesAllowanceForFundsUsedDuringConstructionRate	0.0698
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	95988000	USD
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	93531000	USD
CY2019Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	87982000	USD
CY2021	pnw	Income Tax Percentage Likelihood Largest Tax Benefit Amountis Realized IncomeTaxPercentageLikelihoodLargestTaxBenefitAmountisRealized	0.50
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	229000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-3019000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12535000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	227584000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	216951000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	218664000	USD
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	167733000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	113502000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	141297000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	80000000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	70000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	75000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	63000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	44000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	33000000	USD
CY2021Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	27000000	USD
CY2021	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P6Y
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3803835000	USD
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3586982000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3471209000	USD
CY2021	pnw	Regulatory Cost Recovery Revenue RegulatoryCostRecoveryRevenue	44000000	USD
CY2020	pnw	Regulatory Cost Recovery Revenue RegulatoryCostRecoveryRevenue	54000000	USD
CY2019	pnw	Regulatory Cost Recovery Revenue RegulatoryCostRecoveryRevenue	56000000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	19782000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	8171000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	4069000	USD
CY2021	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	22251000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	20633000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	11819000	USD
CY2021	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	16679000	USD
CY2020	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	9022000	USD
CY2019	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	7717000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	25354000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	19782000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Premiums And Other Receivables AllowanceForDoubtfulAccountsPremiumsAndOtherReceivables	8171000	USD
CY2019Q4	pnw	Public Utilities Requested Longterm Debt Cost Of Capital Percentage PublicUtilitiesRequestedLongtermDebtCostOfCapitalPercentage	0.0410
CY2019Q4	pnw	Public Utilities Requested Equity Cost Of Capital Percentage PublicUtilitiesRequestedEquityCostOfCapitalPercentage	0.1015
CY2019Q4	pnw	Public Utilities Requested Weighted Average Cost Of Capital Percentage PublicUtilitiesRequestedWeightedAverageCostOfCapitalPercentage	0.0741
CY2019Q4	pnw	Rate Plan Comparison Tool Number Of Customers RatePlanComparisonToolNumberOfCustomers	13000	Customer
CY2019Q4	pnw	Rate Plan Comparison Tool Inconvenience Payment RatePlanComparisonToolInconveniencePayment	25	USD
CY2020Q3	pnw	Rate Plan Comparison Tool Inconvenience Payment RatePlanComparisonToolInconveniencePayment	25	USD
CY2020Q3	pnw	Rate Plan Comparison Tool Number Of Customers RatePlanComparisonToolNumberOfCustomers	3800	Customer
CY2021Q4	pnw	Regulatory Asset Including Deferred Fuel And Purchased Power Regulatory Asset Current RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	518524000	USD
CY2021Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1192987000	USD
CY2020Q4	pnw	Regulatory Asset Including Deferred Fuel And Purchased Power Regulatory Asset Current RegulatoryAssetIncludingDeferredFuelAndPurchasedPowerRegulatoryAssetCurrent	291713000	USD
CY2020Q4	us-gaap	Regulatory Assets Noncurrent RegulatoryAssetsNoncurrent	1133987000	USD
CY2021Q4	pnw	Regulatory Liability Including Deferred Fuel And Purchased Power Regulatory Liability Current RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent	296271000	USD
CY2021Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	2499213000	USD
CY2020Q4	pnw	Regulatory Liability Including Deferred Fuel And Purchased Power Regulatory Liability Current RegulatoryLiabilityIncludingDeferredFuelAndPurchasedPowerRegulatoryLiabilityCurrent	229088000	USD
CY2020Q4	us-gaap	Regulatory Liability Noncurrent RegulatoryLiabilityNoncurrent	2450169000	USD
CY2017	us-gaap	Tax Cuts And Jobs Act Of2017 Change In Tax Rate Income Tax Expense Benefit TaxCutsAndJobsActOf2017ChangeInTaxRateIncomeTaxExpenseBenefit	1140000000	USD
CY2021	us-gaap	Regulatory Liability Amortization Period RegulatoryLiabilityAmortizationPeriod	P28Y6M
CY2021	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	31000000	USD
CY2020	us-gaap	Income Tax Reconciliation Deductions Other IncomeTaxReconciliationDeductionsOther	31000000	USD
CY2021	pnw	Income Tax Expense Benefit Attributable To Non Controlling Interests IncomeTaxExpenseBenefitAttributableToNonControllingInterests	0	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	45655000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	43435000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	40731000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3305000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	43435000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3418000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3373000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1449000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1431000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1843000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2659000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1965000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2078000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2664000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	664000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	434000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	45086000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	45655000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	26300000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	25714000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	22813000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	-535000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	266000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Expense UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense	459000	USD
CY2021Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1320000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1855000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1589000	USD
CY2021Q4	pnw	Unrecognized Tax Benefits Interest On Income Taxes Receivable UnrecognizedTaxBenefitsInterestOnIncomeTaxesReceivable	1000000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-5041000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11869000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-13551000	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2458000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1932000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3195000	USD
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	156666000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-2583000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	13801000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-10356000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	95327000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	53398000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-14982000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	17342000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	10974000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	9565000	USD
CY2021	pnw	Deferred Income Tax Expense Benefit Continuing And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations	112669000	USD
CY2020	pnw	Deferred Income Tax Expense Benefit Continuing And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations	64372000	USD
CY2019	pnw	Deferred Income Tax Expense Benefit Continuing And Discontinued Operations DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations	-5417000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110086000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78173000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15773000	USD
CY2019	pnw	Effective Income Tax Rate Reconciliation State Income Tax Credit Net Of Federal Income Tax EffectiveIncomeTaxRateReconciliationStateIncomeTaxCreditNetOfFederalIncomeTax	-8519000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	136127000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	113828000	USD
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	22656000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	19146000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	18599000	USD
CY2021	pnw	Effective Income Tax Rate Reconciliation State Income Tax Credit Net Of Federal Income Tax EffectiveIncomeTaxRateReconciliationStateIncomeTaxCreditNetOfFederalIncomeTax	-7015000	USD
CY2020	pnw	Effective Income Tax Rate Reconciliation State Income Tax Credit Net Of Federal Income Tax EffectiveIncomeTaxRateReconciliationStateIncomeTaxCreditNetOfFederalIncomeTax	-8951000	USD
CY2021	pnw	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Benefit Amount EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackBenefitAmount	-5915000	USD
CY2020	pnw	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Benefit Amount EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackBenefitAmount	0	USD
CY2019	pnw	Effective Income Tax Rate Reconciliation Net Operating Loss Carryback Benefit Amount EffectiveIncomeTaxRateReconciliationNetOperatingLossCarrybackBenefitAmount	0	USD
CY2021	pnw	Effective Income Tax Rate Reconciliation Excess Deferred Income Taxes Amount EffectiveIncomeTaxRateReconciliationExcessDeferredIncomeTaxesAmount	-36558000	USD
CY2020	pnw	Effective Income Tax Rate Reconciliation Excess Deferred Income Taxes Amount EffectiveIncomeTaxRateReconciliationExcessDeferredIncomeTaxesAmount	-50543000	USD
CY2019	pnw	Effective Income Tax Rate Reconciliation Excess Deferred Income Taxes Amount EffectiveIncomeTaxRateReconciliationExcessDeferredIncomeTaxesAmount	-124082000	USD
CY2021	pnw	Income Tax Reconciliation Allowance For Equity Funds Used During Construction IncomeTaxReconciliationAllowanceForEquityFundsUsedDuringConstruction	4180000	USD
CY2020	pnw	Income Tax Reconciliation Allowance For Equity Funds Used During Construction IncomeTaxReconciliationAllowanceForEquityFundsUsedDuringConstruction	2747000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2178000	USD
CY2019	pnw	Income Tax Reconciliation Allowance For Equity Funds Used During Construction IncomeTaxReconciliationAllowanceForEquityFundsUsedDuringConstruction	2476000	USD
CY2021	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	3617000	USD
CY2020	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	4094000	USD
CY2019	us-gaap	Income Tax Reconciliation Minority Interest Income Expense IncomeTaxReconciliationMinorityInterestIncomeExpense	4094000	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	7620000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	7510000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Investment IncomeTaxReconciliationTaxCreditsInvestment	6851000	USD
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-4331000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-3255000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	110086000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	78173000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15773000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	677000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	4287000	USD
CY2021Q4	pnw	Deferred Tax Assets Excess Deferred Income Taxes DeferredTaxAssetsExcessDeferredIncomeTaxes	306915000	USD
CY2020Q4	pnw	Deferred Tax Assets Excess Deferred Income Taxes DeferredTaxAssetsExcessDeferredIncomeTaxes	319091000	USD
CY2021Q4	pnw	Deferred Tax Assets Regulatory Liabilities Asset Retirement Obligation And Removal Costs DeferredTaxAssetsRegulatoryLiabilitiesAssetRetirementObligationAndRemovalCosts	174952000	USD
CY2020Q4	pnw	Deferred Tax Assets Regulatory Liabilities Asset Retirement Obligation And Removal Costs DeferredTaxAssetsRegulatoryLiabilitiesAssetRetirementObligationAndRemovalCosts	157470000	USD
CY2021Q4	pnw	Deferred Tax Assets Regulatory Liabilities Unamortized Investment Tax Credits DeferredTaxAssetsRegulatoryLiabilitiesUnamortizedInvestmentTaxCredits	49601000	USD
CY2020Q4	pnw	Deferred Tax Assets Regulatory Liabilities Unamortized Investment Tax Credits DeferredTaxAssetsRegulatoryLiabilitiesUnamortizedInvestmentTaxCredits	50879000	USD
CY2021Q4	pnw	Deferred Tax Assets Regulatory Liabilities Other Postretirement Benefits DeferredTaxAssetsRegulatoryLiabilitiesOtherPostretirementBenefits	92654000	USD
CY2020Q4	pnw	Deferred Tax Assets Regulatory Liabilities Other Postretirement Benefits DeferredTaxAssetsRegulatoryLiabilitiesOtherPostretirementBenefits	95778000	USD
CY2021Q4	pnw	Deferred Tax Assets Regulatory Liabilities Other DeferredTaxAssetsRegulatoryLiabilitiesOther	65815000	USD
CY2020Q4	pnw	Deferred Tax Assets Regulatory Liabilities Other DeferredTaxAssetsRegulatoryLiabilitiesOther	43551000	USD
CY2021Q4	pnw	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	204890000	USD
CY2020Q4	pnw	Deferred Tax Assets Operating Lease Liability DeferredTaxAssetsOperatingLeaseLiability	107853000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	42136000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	45853000	USD
CY2021Q4	pnw	Deferred Tax Assets Coal Reclamation Liabilities DeferredTaxAssetsCoalReclamationLiabilities	43165000	USD
CY2020Q4	pnw	Deferred Tax Assets Coal Reclamation Liabilities DeferredTaxAssetsCoalReclamationLiabilities	42065000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1134712000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	996755000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2570613000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	2489899000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	27276000	USD
CY2021Q4	pnw	Deferred Tax Assets Renewable Energy Incentives DeferredTaxAssetsRenewableEnergyIncentives	22646000	USD
CY2020Q4	pnw	Deferred Tax Assets Renewable Energy Incentives DeferredTaxAssetsRenewableEnergyIncentives	25355000	USD
CY2021Q4	pnw	Deferred Tax Assets Credit And Loss Carryforwards DeferredTaxAssetsCreditAndLossCarryforwards	57077000	USD
CY2020Q4	pnw	Deferred Tax Assets Credit And Loss Carryforwards DeferredTaxAssetsCreditAndLossCarryforwards	26460000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	74184000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	78113000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	1174000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Pension And Other Postretirement Assets DeferredTaxLiabilitiesPensionAndOtherPostretirementAssets	133624000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Pension And Other Postretirement Assets DeferredTaxLiabilitiesPensionAndOtherPostretirementAssets	123462000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Other Special Use Funds DeferredTaxLiabilitiesOtherSpecialUseFunds	64610000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Other Special Use Funds DeferredTaxLiabilitiesOtherSpecialUseFunds	42927000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	204890000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Operating Lease Right Of Use Assets DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets	107853000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Regulatory Assets Allowance For Equity Funds Used During Construction DeferredTaxLiabilitiesRegulatoryAssetsAllowanceForEquityFundsUsedDuringConstruction	42616000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Regulatory Assets Allowance For Equity Funds Used During Construction DeferredTaxLiabilitiesRegulatoryAssetsAllowanceForEquityFundsUsedDuringConstruction	41038000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Regulatory Assets Deferred Fuel And Purchased Power Mark To Market DeferredTaxLiabilitiesRegulatoryAssetsDeferredFuelAndPurchasedPowerMarkToMarket	96033000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Regulatory Assets Deferred Fuel And Purchased Power Mark To Market DeferredTaxLiabilitiesRegulatoryAssetsDeferredFuelAndPurchasedPowerMarkToMarket	47673000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Regulatory Assets Pension And Other Postretirement Benefits DeferredTaxLiabilitiesRegulatoryAssetsPensionAndOtherPostretirementBenefits	126010000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Regulatory Assets Pension And Other Postretirement Benefits DeferredTaxLiabilitiesRegulatoryAssetsPensionAndOtherPostretirementBenefits	116219000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Regulatory Assets Retired Power Plan Costs DeferredTaxLiabilitiesRegulatoryAssetsRetiredPowerPlanCosts	28389000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Regulatory Assets Retired Power Plan Costs DeferredTaxLiabilitiesRegulatoryAssetsRetiredPowerPlanCosts	35214000	USD
CY2021Q4	pnw	Deferred Tax Liabilities Regulatory Assets Other DeferredTaxLiabilitiesRegulatoryAssetsOther	123902000	USD
CY2020Q4	pnw	Deferred Tax Liabilities Regulatory Assets Other DeferredTaxLiabilitiesRegulatoryAssetsOther	106227000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	28611000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	20472000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3446574000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	3132158000	USD
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2311862000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	2135403000	USD
CY2021	pnw	Increase Decrease In Deferred Income Taxes Due To Regulation Adoption IncreaseDecreaseInDeferredIncomeTaxesDueToRegulationAdoption	-42000000	USD
CY2021Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6913735000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	6314266000	USD
CY2021Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	7063735000	USD
CY2021Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	7726354000	USD
CY2020Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	6314266000	USD
CY2020Q4	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	7612841000	USD
CY2019Q4	pnw	Defined Benefit Plan Ultimate Health Care Cost Trend Rateusedin Calculating Benefit Obligations DefinedBenefitPlanUltimateHealthCareCostTrendRateusedinCalculatingBenefitObligations	0.0475
CY2021Q4	pnw	Defined Benefit Plan Post65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Obligation DefinedBenefitPlanPost65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitObligation	0.0200
CY2021Q4	pnw	Defined Benefit Plan Accumulated Benefit Obligation Funded Percentage DefinedBenefitPlanAccumulatedBenefitObligationFundedPercentage	1
CY2021Q4	pnw	Defined Benefit Plan Accumulated Benefit Obligation Funded Percentage DefinedBenefitPlanAccumulatedBenefitObligationFundedPercentage	1
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0400
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Compensation Increase DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease	0.0400
CY2021Q4	pnw	Defined Benefit Plan Pre65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Obligation DefinedBenefitPlanPre65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitObligation	0.0600
CY2020Q4	pnw	Defined Benefit Plan Pre65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Obligation DefinedBenefitPlanPre65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitObligation	0.0650
CY2021	pnw	Defined Benefit Plan Pre65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Costs DefinedBenefitPlanPre65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitCosts	0.0650
CY2020	pnw	Defined Benefit Plan Pre65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Costs DefinedBenefitPlanPre65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitCosts	0.0700
CY2019	pnw	Defined Benefit Plan Pre65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Costs DefinedBenefitPlanPre65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitCosts	0.0700
CY2021Q4	pnw	Defined Benefit Plan Ultimate Health Care Cost Trend Rateusedin Calculating Benefit Obligations DefinedBenefitPlanUltimateHealthCareCostTrendRateusedinCalculatingBenefitObligations	0.0475
CY2020Q4	pnw	Defined Benefit Plan Ultimate Health Care Cost Trend Rateusedin Calculating Benefit Obligations DefinedBenefitPlanUltimateHealthCareCostTrendRateusedinCalculatingBenefitObligations	0.0475
CY2021Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0475
CY2020Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0475
CY2019Q4	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate1 DefinedBenefitPlanUltimateHealthCareCostTrendRate1	0.0475
CY2021	pnw	Defined Benefit Plan Pre65 Participant Periodafterwhich Rate Reaches Ultimate Trend Rateusedin Calculating Benefit Obligations DefinedBenefitPlanPre65ParticipantPeriodafterwhichRateReachesUltimateTrendRateusedinCalculatingBenefitObligations	P4Y
CY2020	pnw	Defined Benefit Plan Pre65 Participant Periodafterwhich Rate Reaches Ultimate Trend Rateusedin Calculating Benefit Obligations DefinedBenefitPlanPre65ParticipantPeriodafterwhichRateReachesUltimateTrendRateusedinCalculatingBenefitObligations	P5Y
CY2021	pnw	Defined Benefit Plan Pre65 Participant Periodafterwhich Rate Reaches Ultimate Trend Rateusedin Calculating Benefit Costs DefinedBenefitPlanPre65ParticipantPeriodafterwhichRateReachesUltimateTrendRateusedinCalculatingBenefitCosts	P4Y
CY2020	pnw	Defined Benefit Plan Pre65 Participant Periodafterwhich Rate Reaches Ultimate Trend Rateusedin Calculating Benefit Costs DefinedBenefitPlanPre65ParticipantPeriodafterwhichRateReachesUltimateTrendRateusedinCalculatingBenefitCosts	P5Y
CY2019	pnw	Defined Benefit Plan Pre65 Participant Periodafterwhich Rate Reaches Ultimate Trend Rateusedin Calculating Benefit Costs DefinedBenefitPlanPre65ParticipantPeriodafterwhichRateReachesUltimateTrendRateusedinCalculatingBenefitCosts	P7Y
CY2021Q4	pnw	Defined Benefit Plan Post65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Obligation DefinedBenefitPlanPost65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitObligation	0.0200
CY2020Q4	pnw	Defined Benefit Plan Post65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Obligation DefinedBenefitPlanPost65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitObligation	0.0200
CY2021	pnw	Defined Benefit Plan Post65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Costs DefinedBenefitPlanPost65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitCosts	0.0200
CY2020	pnw	Defined Benefit Plan Post65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Costs DefinedBenefitPlanPost65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitCosts	0.0475
CY2019	pnw	Defined Benefit Plan Post65 Health Care Cost Trend Rate Assumedfor Next Fiscal Year Usedin Calculating Benefit Costs DefinedBenefitPlanPost65HealthCareCostTrendRateAssumedforNextFiscalYearUsedinCalculatingBenefitCosts	0.0475
CY2021Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate	0.0450
CY2020Q4	us-gaap	Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationWeightedAverageInterestCreditingRate	0.0450
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate	0.0450
CY2020	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate	0.0450
CY2019	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate	0.0450
CY2021Q4	pnw	Defined Benefit Plan Partnership Funding Commitments Maximum Contribution Amount DefinedBenefitPlanPartnershipFundingCommitmentsMaximumContributionAmount	50000000	USD
CY2021	pnw	Defined Benefit Plan Partnership Funding Commitments Funded Amount DefinedBenefitPlanPartnershipFundingCommitmentsFundedAmount	38000000	USD
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CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	124260000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	87376000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	60228000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	118969000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	122331000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	114015000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3872000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3804000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	4385000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	116803000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	116909000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	112388000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	112616000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	124819000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	334883000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	918418000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	89574000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	828844000	USD
CY2021Q4	pnw	Lease Notyet Commenced Liability Leaseand Nonlease Payments LeaseNotyetCommencedLiabilityLeaseandNonleasePayments	1300000000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	116661000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	75097000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	69075000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	500582000	USD
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CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	11262000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0213
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CY2021Q4	pnw	Equity Contribution Guarantees EquityContributionGuarantees	2000000	USD
CY2021Q4	pnw	Production Tax Credit Guarantees ProductionTaxCreditGuarantees	37000000	USD
CY2021Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	4690000	USD
CY2021Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	110389000	USD
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CY2021Q4	pnw	Special Use Fund Investments Other Gross Fair Value SpecialUseFundInvestmentsOtherGrossFairValue	358410000	USD
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	618720000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	550559000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	538320000	USD
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	112910000	shares
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CY2021Q4	pnw	Assets Fair Value Gross Liabilityand Net Pending Securities Salesand Purchases AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases	563512000	USD
CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1763556000	USD
CY2021Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	3105000	USD
CY2021Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	4373000	USD
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CY2020Q4	pnw	Special Use Fund Investments Other Net Fair Value Pending Salesand Purchases SpecialUseFundInvestmentsOtherNetFairValuePendingSalesandPurchases	504000	USD
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CY2020Q4	pnw	Assets Fair Value Gross Liabilityand Net Pending Securities Salesand Purchases AssetsFairValueGrossLiabilityandNetPendingSecuritiesSalesandPurchases	588460000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1397693000	USD
CY2020Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	2986000	USD
CY2020Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	18619000	USD
CY2021Q4	pnw	Stated Interest Ratefor Notes Receivable StatedInterestRateforNotesReceivable	0.039
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CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	113192000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112942000	shares
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CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.48
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CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	18000000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	18000000	USD
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CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	3000000	USD
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CY2021Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	11000000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
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CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	22000000	USD
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CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P3Y
CY2021	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	0	USD
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	6726000	USD
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	12210000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	10377000	USD
CY2021	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	0	USD
CY2020	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	2358000	USD
CY2019	us-gaap	Gain On Sale Of Investments GainOnSaleOfInvestments	0	USD
CY2021	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	53000	USD
CY2020	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	149000	USD
CY2019	pnw	Miscellaneous Other Nonoperating Income MiscellaneousOtherNonoperatingIncome	63000	USD
CY2021	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	45100000	USD
CY2020	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	56703000	USD
CY2019	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	50263000	USD
CY2021	pnw	Nonoperating Costs NonoperatingCosts	13008000	USD
CY2020	pnw	Nonoperating Costs NonoperatingCosts	12400000	USD
CY2019	pnw	Nonoperating Costs NonoperatingCosts	10663000	USD
CY2021	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	1367000	USD
CY2020	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	0	USD
CY2019	us-gaap	Loss On Sale Of Investments LossOnSaleOfInvestments	1835000	USD
CY2021	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	11021000	USD
CY2020	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	45376000	USD
CY2019	pnw	Miscellaneous Other Nonoperating Expense MiscellaneousOtherNonoperatingExpense	5382000	USD
CY2021	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	25396000	USD
CY2020	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	57776000	USD
CY2019	us-gaap	Other Nonoperating Expense OtherNonoperatingExpense	17880000	USD

Files In Submission

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$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw

2021 Q4 Form 10-K Financial Statement

#000076462222000014 Filed on February 25, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PNW PINNACLE WEST CAPITAL CORP Stock $pnw

2021 Q4 Form 10-K Financial Statement

#000076462222000014 Filed on February 25, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PNW
PINNACLE WEST CAPITAL CORP Stock $pnw