$ZS
Zscaler, Inc. Stock $zs

$zs Overview Financials Valuation SEC Filings Company Website

2021 Q3 Form 10-K Financial Statement

#000171368321000175 Filed on September 16, 2021

Income Statement

Concept	2021 Q3	2021	2020 Q3
Revenue	$197.1M	$673.1M	$125.9M
YoY Change	56.53%	56.07%	46.23%
Cost Of Revenue	$45.48M	$150.3M	$31.40M
YoY Change	44.83%	57.02%	81.5%
Gross Profit	$151.6M	$522.8M	$94.50M
YoY Change	60.42%	55.81%	37.35%
Gross Profit Margin	76.92%	77.67%	75.06%
Selling, General & Admin	$162.7M	$555.9M	$106.6M
YoY Change	52.63%	58.11%	88.67%
% of Gross Profit	107.33%	106.34%	112.8%
Research & Development	$56.18M	$174.7M	$32.80M
YoY Change	71.28%	78.44%	94.08%
% of Gross Profit	37.06%	33.41%	34.71%
Depreciation & Amortization	$10.33M	$36.46M	$6.770M
YoY Change	52.56%	72.7%	89.64%
% of Gross Profit	6.81%	6.97%	7.16%
Operating Expenses	$219.0M	$730.6M	$139.4M
YoY Change	57.1%	62.54%	89.15%
Operating Profit	-$67.40M	-$207.8M	-$44.90M
YoY Change	50.1%	82.36%	816.33%
Interest Expense	-$13.11M	$53.36M	-$4.000M
YoY Change	227.75%	961.97%	-290.48%
% of Operating Profit
Other Income/Expense, Net	$329.0K	$1.186M	-$300.0K
YoY Change	-209.67%	-629.46%	50.0%
Pretax Income	-$80.18M	-$257.2M	-$49.10M
YoY Change	63.3%	128.14%	718.33%
Income Tax	$845.0K	$4.851M	$500.0K
% Of Pretax Income
Net Earnings	-$81.02M	-$262.0M	-$49.50M
YoY Change	63.68%	127.62%	833.96%
Net Earnings / Revenue	-41.11%	-38.93%	-39.32%
Basic Earnings Per Share		-$1.93
Diluted Earnings Per Share	-$588.0K	-$1.93	-$375.9K
COMMON SHARES
Basic Shares Outstanding	138.7M shares	135.7M shares	132.9M shares
Diluted Shares Outstanding		135.7M shares

Balance Sheet

Concept	2021 Q3	2021	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.503B	$1.503B	$1.371B
YoY Change	9.63%	9.63%	275.86%
Cash & Equivalents	$275.9M	$275.9M	$141.9M
Short-Term Investments	$1.227B	$1.227B	$1.229B
Other Short-Term Assets	$88.64M	$88.64M	$63.60M
YoY Change	39.37%	39.37%	66.93%
Inventory
Prepaid Expenses
Receivables	$257.1M	$257.1M	$147.6M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.848B	$1.848B	$1.582B
YoY Change	16.85%	16.85%	218.85%
LONG-TERM ASSETS
Property, Plant & Equipment	$108.6M	$152.9M	$75.73M
YoY Change	43.36%	36.65%	84.51%
Goodwill	$58.98M		$30.06M
YoY Change	96.2%		301.91%
Intangibles
YoY Change
Long-Term Investments		$5.100M
YoY Change		155.0%
Other Assets	$15.65M	$160.2M	$8.054M
YoY Change	94.31%	91.41%	253.71%
Total Long-Term Assets	$409.3M	$409.3M	$251.7M
YoY Change	62.65%	62.63%	132.86%
TOTAL ASSETS
Total Short-Term Assets	$1.848B	$1.848B	$1.582B
Total Long-Term Assets	$409.3M	$409.3M	$251.7M
Total Assets	$2.258B	$2.258B	$1.833B
YoY Change	23.14%	23.13%	203.47%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$12.55M	$12.55M	$5.233M
YoY Change	139.77%	141.29%	-15.71%
Accrued Expenses	$136.4M	$136.4M	$81.40M
YoY Change	67.53%	67.53%	136.63%
Deferred Revenue	$571.3M		$337.3M
YoY Change	69.39%		52.34%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$720.2M	$720.2M	$423.9M
YoY Change	69.9%	69.9%	61.83%
LONG-TERM LIABILITIES
Long-Term Debt	$913.5M	$913.5M	$861.6M
YoY Change	6.03%	6.03%
Other Long-Term Liabilities	$4.453M	$94.99M	$2.586M
YoY Change	72.2%	50.54%	-32.66%
Total Long-Term Liabilities	$4.453M	$1.009B	$2.586M
YoY Change	72.2%	9.07%	-32.66%
TOTAL LIABILITIES
Total Short-Term Liabilities	$720.2M	$720.2M	$423.9M
Total Long-Term Liabilities	$4.453M	$1.009B	$2.586M
Total Liabilities	$1.729B	$1.729B	$1.349B
YoY Change	28.18%	28.19%	356.23%
SHAREHOLDERS EQUITY
Retained Earnings	-$601.6M		-$339.6M
YoY Change	77.16%		51.29%
Common Stock	$139.0K		$133.0K
YoY Change	4.51%		4.72%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$528.9M	$528.9M	$484.8M
YoY Change
Total Liabilities & Shareholders Equity	$2.258B	$2.258B	$1.833B
YoY Change	23.14%	23.13%	203.47%

Cashflow Statement

Concept	2021 Q3	2021	2020 Q3
OPERATING ACTIVITIES
Net Income	-$81.02M	-$262.0M	-$49.50M
YoY Change	63.68%	127.62%	833.96%
Depreciation, Depletion And Amortization	$10.33M	$36.46M	$6.770M
YoY Change	52.56%	72.7%	89.64%
Cash From Operating Activities	$44.74M	$202.0M	$31.64M
YoY Change	41.39%	154.72%	77.45%
INVESTING ACTIVITIES
Capital Expenditures	-$17.03M	$48.17M	-$20.72M
YoY Change	-17.78%	11.82%	101.75%
Acquisitions		$40.53M
YoY Change		2.35%
Other Investing Activities	$120.2M	-$51.37M	-$998.0M
YoY Change	-112.04%	-94.79%	-53184.04%
Cash From Investing Activities	$103.1M	-$109.7M	-$1.019B
YoY Change	-110.12%	-89.44%	12041.84%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	21.45M	$41.68M	1.004B
YoY Change	-97.86%	-95.92%	7032.95%
NET CHANGE
Cash From Operating Activities	44.74M	$202.0M	31.64M
Cash From Investing Activities	103.1M	-$109.7M	-1.019B
Cash From Financing Activities	21.45M	$41.68M	1.004B
Net Change In Cash	169.3M	$134.0M	17.26M
YoY Change	880.93%	111.54%	-26.62%
FREE CASH FLOW
Cash From Operating Activities	$44.74M	$202.0M	$31.64M
Capital Expenditures	-$17.03M	$48.17M	-$20.72M
Free Cash Flow	$61.77M	$153.9M	$52.36M
YoY Change	17.97%	324.54%	86.33%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001713683
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Local Phone Number LocalPhoneNumber	533-0288
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2020Q2	us-gaap	Debt Instrument Convertible Conversion Ratio1 DebtInstrumentConvertibleConversionRatio1	0.0066
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-07-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--07-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	001-38413
CY2021	dei	Entity Registrant Name EntityRegistrantName	ZSCALER, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	26-1173892
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	120 Holger Way
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	San Jose
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95134
CY2021	dei	City Area Code CityAreaCode	408
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.001 Par Value
CY2021	dei	Trading Symbol TradingSymbol	ZS
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	399000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-627000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	0	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1113000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	195000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	392000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-263142000	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-114921000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-28263000	USD
CY2018Q3	us-gaap	Stockholders Equity StockholdersEquity	240236000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	29862000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	16436000	USD
CY2019	zs	Repayment Of Notes Receivable Stockholders RepaymentOfNotesReceivableStockholders	1905000	USD
CY2019	zs	Increase Decrease To Notes Receivable Related To Early Exercised Stock Options IncreaseDecreaseToNotesReceivableRelatedToEarlyExercisedStockOptions	146000	USD
CY2019	zs	Adjustments To Additional Paid In Capital Initial Public Offering Costs Adjustment AdjustmentsToAdditionalPaidInCapitalInitialPublicOfferingCostsAdjustment	300000	USD
CY2019	zs	Adjustments To Additional Paid In Capital Early Exercise Of Stock Options AdjustmentsToAdditionalPaidInCapitalEarlyExerciseOfStockOptions	983000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	46953000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	392000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-28655000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	308558000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	21602000	USD
CY2021	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	20995000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	15333000	USD
CY2020	zs	Stock Vested During Period Value StockVestedDuringPeriodValue	0	USD
CY2020	zs	Adjustments To Additional Paid In Capital Early Exercise Of Stock Options AdjustmentsToAdditionalPaidInCapitalEarlyExerciseOfStockOptions	463000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	125675000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	273364000	USD
CY2020	zs	Adjustment To Additional Paid In Capital Purchase Of Capped Call AdjustmentToAdditionalPaidInCapitalPurchaseOfCappedCall	145245000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	195000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-115116000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	484829000	USD
CY2021	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	18221000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	25704000	USD
CY2021	zs	Stock Vested During Period Value StockVestedDuringPeriodValue	0	USD
CY2021	zs	Adjustments To Additional Paid In Capital Early Exercise Of Stock Options AdjustmentsToAdditionalPaidInCapitalEarlyExerciseOfStockOptions	93000	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	263190000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1113000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-262029000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	528895000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-262029000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-115116000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-28655000	USD
CY2021	zs	Depreciation Depletion And Amortization Excluding Amortization Of Deferred Contract Costs DepreciationDepletionAndAmortizationExcludingAmortizationOfDeferredContractCosts	29663000	USD
CY2020	zs	Depreciation Depletion And Amortization Excluding Amortization Of Deferred Contract Costs DepreciationDepletionAndAmortizationExcludingAmortizationOfDeferredContractCosts	17734000	USD
CY2019	zs	Depreciation Depletion And Amortization Excluding Amortization Of Deferred Contract Costs DepreciationDepletionAndAmortizationExcludingAmortizationOfDeferredContractCosts	10398000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6795000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3384000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	908000	USD
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	40558000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	24922000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	18651000	USD
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	51923000	USD
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	4885000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	0	USD
CY2020	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	13555000	USD
CY2019	us-gaap	Operating Lease Right Of Use Asset Amortization Expense OperatingLeaseRightOfUseAssetAmortizationExpense	0	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	258535000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	121395000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	46423000	USD
CY2021	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-11715000	USD
CY2020	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	-50000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	2181000	USD
CY2021	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	2406000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1172000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	1392000	USD
CY2021	us-gaap	Asset Impairment Charges AssetImpairmentCharges	416000	USD
CY2020	us-gaap	Asset Impairment Charges AssetImpairmentCharges	746000	USD
CY2019	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-307000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-321000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-284000	USD
CY2020	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	21092000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	14990000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-109668000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	111605000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	54222000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	31730000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	137673000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	65052000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Asset IncreaseDecreaseInContractWithCustomerAsset	32526000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3388000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	13580000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7642000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7451000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	862000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	495000	USD
CY2021	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	6532000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	2292000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	-336000	USD
CY2021	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	43877000	USD
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	27900000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	-1849000	USD
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	262425000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	118017000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	87179000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	22051000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	7604000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	202040000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	79317000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	58027000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	48165000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	43072000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	25520000	USD
CY2021	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	10132000	USD
CY2020	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	8737000	USD
CY2019	us-gaap	Payments To Develop Software PaymentsToDevelopSoftware	3162000	USD
CY2021	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2020	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	0	USD
CY2019	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	1480000	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	40530000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	39601000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	11432000	USD
CY2021	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	3077000	USD
CY2020	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	2000000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	815480000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1255629000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	335186000	USD
CY2021	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	785217000	USD
CY2020	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	289785000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	199716000	USD
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	22499000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1038162000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-162074000	USD
CY2021	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2019	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	1797000	USD
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	18221000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	21602000	USD
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	15333000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	29862000	USD
CY2021	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	25704000	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	16436000	USD
CY2021	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	2250000	USD
CY2020	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2021	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	1130522000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2021	zs	Payments For Capped Call PaymentsForCappedCall	0	USD
CY2020	zs	Payments For Capped Call PaymentsForCappedCall	145245000	USD
CY2019	zs	Payments For Capped Call PaymentsForCappedCall	0	USD
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	22000	USD
CY2021	zs	Proceeds From Repayment Of Notes Receivable Stockholders ProceedsFromRepaymentOfNotesReceivableStockholders	0	USD
CY2020	zs	Proceeds From Repayment Of Notes Receivable Stockholders ProceedsFromRepaymentOfNotesReceivableStockholders	0	USD
CY2019	zs	Proceeds From Repayment Of Notes Receivable Stockholders ProceedsFromRepaymentOfNotesReceivableStockholders	1905000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	41675000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2021	zs	Net Change In Capital Expenditures Included In Liabilities NetChangeInCapitalExpendituresIncludedInLiabilities	14000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1022212000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	46384000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	134047000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	63367000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-57663000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	141851000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	78484000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	136147000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	275898000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	141851000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	78484000	USD
CY2021	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4144000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2525000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1770000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	1462000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	0	USD
CY2020	zs	Net Change In Capital Expenditures Included In Liabilities NetChangeInCapitalExpendituresIncludedInLiabilities	-1486000	USD
CY2019	zs	Net Change In Capital Expenditures Included In Liabilities NetChangeInCapitalExpendituresIncludedInLiabilities	2911000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	27627000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	31673000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2021	us-gaap	Stock Issued1 StockIssued1	93000	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	463000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	983000	USD
CY2021	zs	Deferred Offering Costs Accrued But Not Paid DeferredOfferingCostsAccruedButNotPaid	0	USD
CY2020	zs	Deferred Offering Costs Accrued But Not Paid DeferredOfferingCostsAccruedButNotPaid	0	USD
CY2019	zs	Deferred Offering Costs Accrued But Not Paid DeferredOfferingCostsAccruedButNotPaid	-2097000	USD
CY2021	us-gaap	Fiscal Period FiscalPeriod	<div style="margin-bottom:9pt;margin-top:6pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:144%">Fiscal Year </span></div><div style="margin-bottom:9pt;margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">Our fiscal year ends on July 31. References to fiscal 2021, for example, refer to our fiscal year ended July 31, 2021.</span></div>
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:9pt;margin-top:18pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:144%">Use of Estimates </span></div><div style="margin-top:6pt;text-align:justify;text-indent:25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Such estimates include, but are not limited to, the determination of revenue recognition, deferred revenue, deferred contract acquisition costs, valuation of acquired intangible assets, period of benefit generated from our deferred contract acquisition costs, allowance for doubtful accounts, valuation of common stock options and stock-based awards, useful lives of property and equipment, useful lives of acquired intangible assets, recoverability of goodwill, valuation of deferred tax assets and liabilities, loss contingencies related to litigation, fair value and effective interest rate of convertible senior notes, valuation of non-marketable equity investments and the discount rate used for operating leases. Management determines these estimates and assumptions based on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ significantly from these estimates, and such differences may be material to the consolidated financial statements.</span></div><div style="margin-bottom:9pt;margin-top:6pt;text-align:justify;text-indent:25pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">Due to the COVID-19 pandemic, there is ongoing uncertainty and significant disruption in the global economy and financial markets. We are not aware of any specific event or circumstances that would require an update to our estimates, judgments or assumptions or a revision to the carrying value of our assets or liabilities as of the date of issuance of these consolidated financial statements. These estimates, judgments and assumptions may change in the future, as new events occur or additional information is obtained.</span></div>
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:9pt;margin-top:6pt;text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:144%">Concentration of Risks </span></div><div style="margin-bottom:9pt;margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">We generate revenue primarily from sale of subscriptions to access our cloud platform, together with related support services. Our sales team, along with our channel partner network of global telecommunications service providers, system integrators and value-added resellers (collectively "channel partners"), sells our services worldwide to organizations of all sizes. Due to the nature of our services and the terms and conditions of our contracts with our channel partners, our business could be affected unfavorably if we are not able to continue our relationships with them. </span></div><div style="margin-bottom:9pt;margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">Our financial instruments that are exposed to concentrations of credit risk consist primarily of cash, cash equivalents, short-term investments and accounts receivable. Although we deposit our cash with multiple financial institutions, the deposits, at times, may exceed federally insured limits. Cash equivalents and short-term investments consist of highly liquid investments in money market funds, U.S. treasury, U.S. agency securities and corporate debt securities, which are invested through financial institutions in the United States.</span></div><div style="margin-bottom:9pt;margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">We grant credit to our customers in the normal course of business. We monitor the financial condition of our customers to reduce credit risk. Refer to Note 2, Revenue Recognition, for information regarding customers with concentration of 10% or more of the total balance of accounts receivable, net.</span></div>
CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2021	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2019	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2020	us-gaap	Other Than Temporary Impairment Loss Debt Securities Available For Sale OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSale	0	USD
CY2021Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	16500000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	13200000	USD
CY2019Q3	us-gaap	Capitalized Computer Software Gross CapitalizedComputerSoftwareGross	3700000	USD
CY2021Q3	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	5900000	USD
CY2020Q3	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	1400000	USD
CY2019Q3	us-gaap	Capitalized Computer Software Accumulated Amortization CapitalizedComputerSoftwareAccumulatedAmortization	1000000	USD
CY2021	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	400000	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	700000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P4Y
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period1 ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1	P4Y
CY2021	us-gaap	Advertising Expense AdvertisingExpense	11800000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	11800000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	8600000	USD
CY2021	us-gaap	Guarantees Indemnifications And Warranties Policies GuaranteesIndemnificationsAndWarrantiesPolicies	<div style="margin-top:6pt;text-align:justify;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:144%">Warranties and Indemnification</span></div><div style="margin-bottom:9pt;margin-top:12pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:144%">Our cloud platform is generally warranted to be free of defects under normal use and to perform substantially in accordance with the subscription agreement. Additionally, our contracts generally include provisions for indemnifying customers and channel partners against liabilities if our services infringe or misappropriate a third party’s intellectual property rights. Costs and liabilities incurred as a result of warranties and indemnification obligations were not material during the periods presented.</span></div>
CY2021Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	630600000	USD
CY2020Q3	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	369800000	USD
CY2021	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	335500000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	220900000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	143900000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	1553500000	USD
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.49
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P12M
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.97
CY2021Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P3Y
CY2021Q3	us-gaap	Capitalized Contract Cost Amortization Period CapitalizedContractCostAmortizationPeriod	P5Y
CY2020Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	109915000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	69785000	USD
CY2018Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	55910000	USD
CY2021	zs	Capitalization Of Contract Acquisition Costs CapitalizationOfContractAcquisitionCosts	137673000	USD
CY2020	zs	Capitalization Of Contract Acquisition Costs CapitalizationOfContractAcquisitionCosts	65052000	USD
CY2019	zs	Capitalization Of Contract Acquisition Costs CapitalizationOfContractAcquisitionCosts	32526000	USD
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	40558000	USD
CY2020	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	24922000	USD
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	18651000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	207030000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	109915000	USD
CY2019Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	69785000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	57373000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	32240000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	149657000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	77675000	USD
CY2021Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	207030000	USD
CY2020Q3	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	109915000	USD
CY2021Q3	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	46700000	USD
CY2020Q3	us-gaap	Accrued Sales Commission Current And Noncurrent AccruedSalesCommissionCurrentAndNoncurrent	21000000.0	USD
CY2021Q3	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	178336000	USD
CY2021Q3	zs	Cash Equivalents Gross Unrealized Gains CashEquivalentsGrossUnrealizedGains	0	USD
CY2021Q3	zs	Cash Equivalents Gross Unrealized Losses CashEquivalentsGrossUnrealizedLosses	0	USD
CY2021Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	178336000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1226562000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	255000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	163000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1226654000	USD
CY2021Q3	zs	Cash Equivalents And Available For Sale Securities At Cost CashEquivalentsAndAvailableForSaleSecuritiesAtCost	1404898000	USD
CY2021Q3	zs	Cash Equivalents And Short Term Investments Gross Unrealized Gains CashEquivalentsAndShortTermInvestmentsGrossUnrealizedGains	255000	USD
CY2021Q3	zs	Cash Equivalents And Short Term Investments Gross Unrealized Losses CashEquivalentsAndShortTermInvestmentsGrossUnrealizedLosses	163000	USD
CY2021Q3	zs	Cash Equivalents And Short Term Investments Estimated Fair Value CashEquivalentsAndShortTermInvestmentsEstimatedFairValue	1404990000	USD
CY2020Q3	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	106684000	USD
CY2020Q3	zs	Cash Equivalents Gross Unrealized Gains CashEquivalentsGrossUnrealizedGains	0	USD
CY2020Q3	zs	Cash Equivalents Gross Unrealized Losses CashEquivalentsGrossUnrealizedLosses	1000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	106683000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1228143000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	907000	USD
CY2020Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	328000	USD
CY2020Q3	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1228722000	USD
CY2020Q3	zs	Cash Equivalents And Available For Sale Securities At Cost CashEquivalentsAndAvailableForSaleSecuritiesAtCost	1334827000	USD
CY2020Q3	zs	Cash Equivalents And Short Term Investments Gross Unrealized Gains CashEquivalentsAndShortTermInvestmentsGrossUnrealizedGains	907000	USD
CY2020Q3	zs	Cash Equivalents And Short Term Investments Gross Unrealized Losses CashEquivalentsAndShortTermInvestmentsGrossUnrealizedLosses	329000	USD
CY2020Q3	zs	Cash Equivalents And Short Term Investments Estimated Fair Value CashEquivalentsAndShortTermInvestmentsEstimatedFairValue	1335405000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	800659000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	800793000	USD
CY2021Q3	zs	Debt Securities Available For Sale Maturity After One Through Two Years Amortized Cost DebtSecuritiesAvailableForSaleMaturityAfterOneThroughTwoYearsAmortizedCost	425903000	USD
CY2021Q3	zs	Debt Securities Available For Sale Maturity After One Through Two Years Fair Value DebtSecuritiesAvailableForSaleMaturityAfterOneThroughTwoYearsFairValue	425861000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1226562000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1226654000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	568898000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	163000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	568898000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	163000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	794415000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	327000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	5502000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	799917000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	328000	USD
CY2021Q3	us-gaap	Interest Receivable Current InterestReceivableCurrent	3900000	USD
CY2020Q3	us-gaap	Interest Receivable Current InterestReceivableCurrent	3800000	USD
CY2021	zs	Payments To Acquire Equity Securities Without Readily Determinable Fair Value PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	3100000	USD
CY2021Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	5100000	USD
CY2020Q3	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	2000000.0	USD
CY2021Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	185793000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	126362000	USD
CY2021Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	77217000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	50628000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	108576000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75734000	USD
CY2021	zs	Depreciation Depletion And Amortization Excluding Amortization Of Deferred Contract Costs DepreciationDepletionAndAmortizationExcludingAmortizationOfDeferredContractCosts	29700000	USD
CY2020	zs	Depreciation Depletion And Amortization Excluding Amortization Of Deferred Contract Costs DepreciationDepletionAndAmortizationExcludingAmortizationOfDeferredContractCosts	17700000	USD
CY2019	zs	Depreciation Depletion And Amortization Excluding Amortization Of Deferred Contract Costs DepreciationDepletionAndAmortizationExcludingAmortizationOfDeferredContractCosts	10400000	USD
CY2021	us-gaap	Derivative Term Of Contract DerivativeTermOfContract	P18M
CY2020Q3	us-gaap	Goodwill Goodwill	30059000	USD
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	28918000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	58977000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	28316000	USD
CY2021	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	14900000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	43216000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	4292000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6795000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11087000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	24024000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	32129000	USD
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	6800000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3400000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	900000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	8678000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	8181000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6741000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	6038000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2491000	USD
CY2021Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	32129000	USD
CY2020Q2	us-gaap	Proceeds From Issuance Of Debt ProceedsFromIssuanceOfDebt	1130500000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	5025000	USD
CY2020Q2	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	150.80
CY2020Q2	us-gaap	Debt Instrument Convertible Number Of Equity Instruments DebtInstrumentConvertibleNumberOfEquityInstruments	7626000	shares
CY2020Q2	us-gaap	Debt Instrument Convertible Threshold Trading Days DebtInstrumentConvertibleThresholdTradingDays	20	trading_day
CY2020Q2	us-gaap	Debt Instrument Convertible Threshold Consecutive Trading Days1 DebtInstrumentConvertibleThresholdConsecutiveTradingDays1	30	trading_day
CY2020Q2	us-gaap	Debt Instrument Convertible Threshold Percentage Of Stock Price Trigger DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger	1.30
CY2020Q2	zs	Debt Instrument Convertible Trading Days Available For Conversion DebtInstrumentConvertibleTradingDaysAvailableForConversion	5	trading_day
CY2020Q2	zs	Debt Instrument Convertible Threshold Consecutive Trading Days Available For Conversion DebtInstrumentConvertibleThresholdConsecutiveTradingDaysAvailableForConversion	5	trading_day
CY2020Q2	zs	Debt Instrument Convertible Threshold Percentage Of Conversion DebtInstrumentConvertibleThresholdPercentageOfConversion	0.98
CY2021Q3	us-gaap	Debt Instrument Convertible Threshold Percentage Of Stock Price Trigger DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger	1.30
CY2021Q3	us-gaap	Debt Instrument Convertible Threshold Trading Days DebtInstrumentConvertibleThresholdTradingDays	20	trading_day
CY2021Q3	us-gaap	Debt Instrument Convertible Threshold Consecutive Trading Days1 DebtInstrumentConvertibleThresholdConsecutiveTradingDays1	30	trading_day
CY2020Q2	us-gaap	Debt Instrument Redemption Price Percentage Of Principal Amount Redeemed DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed	1
CY2020Q2	us-gaap	Debt Instrument Interest Rate Effective Percentage DebtInstrumentInterestRateEffectivePercentage	0.0575
CY2020Q2	zs	Debt Instrument Convertible Equity Component Gross DebtInstrumentConvertibleEquityComponentGross	278500000	USD
CY2020Q2	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	19500000	USD
CY2020Q2	zs	Adjustments To Additional Paid In Capital Debt Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalDebtIssuedIssuanceCosts	4700000	USD
CY2020Q2	us-gaap	Debt Instrument Convertible Carrying Amount Of The Equity Component DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent	273400000	USD
CY2020Q2	zs	Adjustments To Additional Paid In Capital Debt Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalDebtIssuedIssuanceCosts	4700000	USD
CY2020Q2	zs	Debt Instrument Convertible Equity Component Tax Effect DebtInstrumentConvertibleEquityComponentTaxEffect	400000	USD
CY2021Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1150000000	USD
CY2020Q3	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1150000000	USD
CY2021Q3	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	224527000	USD
CY2020Q3	us-gaap	Debt Instrument Unamortized Discount Premium Net DebtInstrumentUnamortizedDiscountPremiumNet	273829000	USD
CY2021Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	11935000	USD
CY2020Q3	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	14556000	USD
CY2021Q3	us-gaap	Long Term Debt LongTermDebt	913538000	USD
CY2020Q3	us-gaap	Long Term Debt LongTermDebt	861615000	USD
CY2021	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	1441000	USD
CY2020	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	140000	USD
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	49302000	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	4638000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2621000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	247000	USD
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	53364000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	13602000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2221000	USD
CY2021Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1931700000	USD
CY2020Q3	us-gaap	Long Term Debt Fair Value LongTermDebtFairValue	1307500000	USD
CY2020Q2	us-gaap	Option Indexed To Issuers Equity Strike Price1 OptionIndexedToIssuersEquityStrikePrice1	150.80
CY2020Q2	zs	Option Indexed To Issuers Equity Cap Price OptionIndexedToIssuersEquityCapPrice	246.76
CY2020Q2	zs	Adjustment To Additional Paid In Capital Purchase Of Capped Call AdjustmentToAdditionalPaidInCapitalPurchaseOfCappedCall	145200000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	20946000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2303000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	6436000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	3223000	USD
CY2021	us-gaap	Sublease Income SubleaseIncome	199000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	126000	USD
CY2021	us-gaap	Lease Cost LeaseCost	29404000	USD
CY2020	us-gaap	Lease Cost LeaseCost	19002000	USD
CY2021Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	44339000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	36119000	USD
CY2021Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	19842000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	15600000	USD
CY2021Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	31225000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	28023000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	22100000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	7600000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3000000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	13800000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	21167000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	14039000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	8184000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4994000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	5015000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	840000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	54239000	USD
CY2021Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3172000	USD
CY2021Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	51067000	USD
CY2021	zs	Operating Lease Lease Not Yet Commenced Expense OperatingLeaseLeaseNotYetCommencedExpense	10100000	USD
CY2021Q3	us-gaap	Purchase Obligation PurchaseObligation	25200000	USD
CY2020Q3	us-gaap	Purchase Obligation PurchaseObligation	20000000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Next Twelve Months PurchaseObligationDueInNextTwelveMonths	10118000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Second Year PurchaseObligationDueInSecondYear	13401000	USD
CY2021Q3	us-gaap	Purchase Obligation Due In Third Year PurchaseObligationDueInThirdYear	1725000	USD
CY2021Q3	us-gaap	Purchase Obligation PurchaseObligation	25244000	USD
CY2017Q4	us-gaap	Loss Contingency Patents Allegedly Infringed Number LossContingencyPatentsAllegedlyInfringedNumber	4	patent
CY2021Q3	zs	Common Stock Number Of Votes For Each Share CommonStockNumberOfVotesForEachShare	1	vote
CY2021Q3	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	44048000	shares
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	21300000	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5175000	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.90
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	625904000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2021	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	2466000	shares
CY2021	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	7.39
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	421789000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	112000	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	8.31
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2597000	shares
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	10.37
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y2M12D
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	585829000	USD
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2546000	shares
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	6.46
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P3Y6M
CY2020Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	314111000	USD
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	1777000	shares
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	8.53
CY2021	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P2Y10M24D
CY2021Q3	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	404151000	USD
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	421800000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	242400000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	300900000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	22.76
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2021Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Per Share Weighted Average Price Of Shares Purchased ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased	75.92
CY2020Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Per Share Weighted Average Price Of Shares Purchased ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased	18.76
CY2019Q3	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Per Share Weighted Average Price Of Shares Purchased ShareBasedCompensationArrangementByShareBasedPaymentAwardPerShareWeightedAveragePriceOfSharesPurchased	14.53
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	258535000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	121395000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	46423000	USD
CY2021Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	729200000	USD
CY2021	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y10M24D
CY2021	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	6300000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	4400000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	500000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-275189000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-123085000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-34145000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	18011000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	10357000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	6233000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-257178000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-112728000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-27912000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	126000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	45000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	64000	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	7104000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	4013000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2325000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	7230000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4058000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2389000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-349000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-864000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1431000	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-243000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-107000	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-2027000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-563000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-108000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2379000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1670000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-1646000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4851000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2388000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	743000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2021	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.002
CY2021	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.001
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.004
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.009
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	-0.001
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	-0.002
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Meals And Entertainment EffectiveIncomeTaxRateReconciliationNondeductibleExpenseMealsAndEntertainment	-0.019
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.439
CY2021	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.019
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	0.370
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Percent EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent	1.472
CY2021	zs	Effective Income Tax Rate Reconciliation Provision To Return Adjustments EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments	0.001
CY2020	zs	Effective Income Tax Rate Reconciliation Provision To Return Adjustments EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments	-0.003
CY2019	zs	Effective Income Tax Rate Reconciliation Provision To Return Adjustments EffectiveIncomeTaxRateReconciliationProvisionToReturnAdjustments	0.012
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.041
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.068
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.100
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.706
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.650
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1.769
CY2021	zs	Effective Income Tax Rate Reconciliation Tax Withholding Percent EffectiveIncomeTaxRateReconciliationTaxWithholdingPercent	-0.007
CY2020	zs	Effective Income Tax Rate Reconciliation Tax Withholding Percent EffectiveIncomeTaxRateReconciliationTaxWithholdingPercent	-0.011
CY2019	zs	Effective Income Tax Rate Reconciliation Tax Withholding Percent EffectiveIncomeTaxRateReconciliationTaxWithholdingPercent	-0.024
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.005
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.001
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	21849000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	14218000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	27123000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	42225000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	23573000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1273000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	1002000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.021
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.027
CY2021Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	341777000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	149430000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	7769000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	3896000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	33028000	USD
CY2021Q3	zs	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	10505000	USD
CY2020Q3	zs	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	8571000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	130236000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	113412000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	742000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	33000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	459168000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	227846000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	345756000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	97610000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	6341000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	4224000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	46709000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost	24727000	USD
CY2021Q3	zs	Deferred Tax Liabilities Convertible Debt DeferredTaxLiabilitiesConvertibleDebt	50593000	USD
CY2020Q3	zs	Deferred Tax Liabilities Convertible Debt DeferredTaxLiabilitiesConvertibleDebt	61071000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	9069000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	6978000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	103732000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	131000	USD
CY2021Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	112712000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	97131000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	700000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	479000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	130236000	USD
CY2018Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	45578000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Period Increase Decrease ValuationAllowancesAndReservesPeriodIncreaseDecrease	215520000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Period Increase Decrease ValuationAllowancesAndReservesPeriodIncreaseDecrease	26504000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Period Increase Decrease ValuationAllowancesAndReservesPeriodIncreaseDecrease	58154000	USD
CY2021Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	345756000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	130236000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	103732000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Period Increase Decrease ValuationAllowancesAndReservesPeriodIncreaseDecrease	215500000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Period Increase Decrease ValuationAllowancesAndReservesPeriodIncreaseDecrease	26500000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Period Increase Decrease ValuationAllowancesAndReservesPeriodIncreaseDecrease	58200000	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18500000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4427000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1611000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4471000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10509000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	581000	USD
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	8573000	USD
CY2021Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18501000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	-262029000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-115116000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-28655000	USD
CY2021	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	135654000	shares
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	129323000	shares
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	123566000	shares
CY2021	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-1.93
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.89
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.23
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	18569000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14554000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14048000	shares
CY2021	us-gaap	Debt Instrument Convertible Number Of Equity Instruments DebtInstrumentConvertibleNumberOfEquityInstruments	7600000	shares
CY2021Q3	us-gaap	Debt Instrument Convertible Conversion Price1 DebtInstrumentConvertibleConversionPrice1	150.80
CY2021	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2021Q3	us-gaap	Noncurrent Assets NoncurrentAssets	152915000	USD
CY2020Q3	us-gaap	Noncurrent Assets NoncurrentAssets	111853000	USD

Files In Submission

Name	View Source	Status
0001713683-21-000175-index-headers.html	Edgar Link	pending
0001713683-21-000175-index.html	Edgar Link	pending
0001713683-21-000175.txt	Edgar Link	pending
0001713683-21-000175-xbrl.zip	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
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report.css	Edgar Link	pending
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zs-20210731.htm	Edgar Link	pending
zs-20210731.xsd	Edgar Link	pending
zs-20210731_cal.xml	Edgar Link	unprocessable
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zs-20210731_htm.xml	Edgar Link	completed
zs-20210731_lab.xml	Edgar Link	unprocessable
zs-20210731_pre.xml	Edgar Link	unprocessable
zsexhibit211fy2110k.htm	Edgar Link	pending
zsexhibit231fy2110k.htm	Edgar Link	pending
zsexhibit311fy2110k.htm	Edgar Link	pending
zsexhibit312fy2110k.htm	Edgar Link	pending
zsexhibit321fy2110k.htm	Edgar Link	pending

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2021 Q3 Form 10-K Financial Statement

#000171368321000175 Filed on September 16, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ZS Zscaler, Inc. Stock $zs

2021 Q3 Form 10-K Financial Statement

#000171368321000175 Filed on September 16, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ZS
Zscaler, Inc. Stock $zs