$ANET
Arista Networks, Inc. Stock $anet

$anet Overview Financials Valuation SEC Filings Company Website

2019 Q2 Form 10-Q Financial Statement

#000159653219000184 Filed on August 02, 2019

Income Statement

Concept	2019 Q2	2018 Q2	2018 Q1
Revenue	$608.3M	$519.8M	$472.5M
YoY Change	17.02%	28.29%	40.84%
Cost Of Revenue	$218.1M	$186.0M	$169.6M
YoY Change	17.3%	27.87%	39.83%
Gross Profit	$390.2M	$333.9M	$302.9M
YoY Change	16.86%	28.53%	41.41%
Gross Profit Margin	64.14%	64.23%	64.11%
Selling, General & Admin	$69.06M	$64.61M	$61.82M
YoY Change	6.89%	4.29%	4.46%
% of Gross Profit	17.7%	19.35%	20.41%
Research & Development	$114.3M	$104.1M	$102.4M
YoY Change	9.82%	28.18%	25.43%
% of Gross Profit	29.29%	31.17%	33.79%
Depreciation & Amortization	$4.800M	$5.400M	$5.697M
YoY Change	-11.11%	8.0%	15.35%
% of Gross Profit	1.23%	1.62%	1.88%
Operating Expenses	$183.4M	$573.7M	$164.2M
YoY Change	-68.04%	300.78%	16.61%
Operating Profit	$206.8M	-$239.8M	$138.7M
YoY Change	-186.25%	-305.6%	88.97%
Interest Expense	$0.00	$680.0K	$687.0K
YoY Change	-100.0%	9.15%	-198.14%
% of Operating Profit	0.0%		0.5%
Other Income/Expense, Net	$13.81M	-$2.169M	$4.156M
YoY Change	-736.75%	-537.3%	1240.65%
Pretax Income	$220.6M	-$242.0M	$142.9M
YoY Change	-191.19%	-306.58%	93.81%
Income Tax	$31.40M	-$86.70M	-$1.644M
% Of Pretax Income	14.23%		-1.15%
Net Earnings	$189.3M	-$155.3M	$144.5M
YoY Change	-221.89%	-251.21%	74.22%
Net Earnings / Revenue	31.11%	-29.87%	30.59%
Basic Earnings Per Share	$2.47	-$2.08	$1.95
Diluted Earnings Per Share	$2.33	-$2.08	$1.79
COMMON SHARES
Basic Shares Outstanding	76.55M shares	74.50M shares	73.99M shares
Diluted Shares Outstanding	81.34M shares	74.50M shares	80.72M shares

Balance Sheet

Concept	2019 Q2	2018 Q2	2018 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.258B	$1.860B	$1.738B
YoY Change	21.36%	65.39%	66.6%
Cash & Equivalents	$944.4M	$711.2M	$886.2M
Short-Term Investments	$1.313B	$1.149B	$851.9M
Other Short-Term Assets	$43.67M	$87.16M	$82.84M
YoY Change	-49.9%	-29.92%	-26.18%
Inventory	$314.2M	$245.4M	$268.1M
Prepaid Expenses
Receivables	$343.1M	$260.9M	$207.3M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.029B	$2.621B	$2.379B
YoY Change	15.57%	34.44%	36.98%
LONG-TERM ASSETS
Property, Plant & Equipment	$41.02M	$73.74M	$73.83M
YoY Change	-44.37%	-2.77%	-3.27%
Goodwill	$53.68M
YoY Change
Intangibles
YoY Change
Long-Term Investments	$31.50M	$35.00M	$36.10M
YoY Change	-10.0%	-3.05%	0.0%
Other Assets	$27.11M	$20.02M	$22.88M
YoY Change	35.4%	-1.41%	15.06%
Total Long-Term Assets	$412.8M	$211.6M	$200.9M
YoY Change	95.12%	-1.03%	-0.94%
TOTAL ASSETS
Total Short-Term Assets	$3.029B	$2.621B	$2.379B
Total Long-Term Assets	$412.8M	$211.6M	$200.9M
Total Assets	$3.441B	$2.832B	$2.580B
YoY Change	21.51%	30.94%	33.02%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$86.13M	$53.18M	$70.43M
YoY Change	61.96%	-33.87%	15.49%
Accrued Expenses	$113.9M	$86.69M	$85.73M
YoY Change	31.38%	2.7%	13.86%
Deferred Revenue	$272.4M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$525.0M	$826.8M	$457.8M
YoY Change	-36.5%	35.36%	-14.03%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$36.60M	$37.10M
YoY Change	-100.0%	-5.43%	-5.12%
Other Long-Term Liabilities	$25.35M	$22.12M	$21.34M
YoY Change	14.63%	176.73%	164.51%
Total Long-Term Liabilities	$25.35M	$22.12M	$21.34M
YoY Change	14.63%	176.73%	164.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$525.0M	$826.8M	$457.8M
Total Long-Term Liabilities	$25.35M	$22.12M	$21.34M
Total Liabilities	$915.7M	$1.112B	$735.0M
YoY Change	-17.66%	38.12%	3.34%
SHAREHOLDERS EQUITY
Retained Earnings	$1.485B	$852.0M	$1.007B
YoY Change	74.28%	37.07%	94.12%
Common Stock	$8.000K	$8.000K	$8.000K
YoY Change	0.0%	14.29%	14.29%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.526B	$1.720B	$1.845B
YoY Change
Total Liabilities & Shareholders Equity	$3.441B	$2.832B	$2.580B
YoY Change	21.51%	30.94%	33.02%

Cashflow Statement

Concept	2019 Q2	2018 Q2	2018 Q1
OPERATING ACTIVITIES
Net Income	$189.3M	-$155.3M	$144.5M
YoY Change	-221.89%	-251.21%	74.22%
Depreciation, Depletion And Amortization	$4.800M	$5.400M	$5.697M
YoY Change	-11.11%	8.0%	15.35%
Cash From Operating Activities	$196.4M	$130.6M	$195.5M
YoY Change	50.38%	64.9%	20.07%
INVESTING ACTIVITIES
Capital Expenditures	-$3.400M	-$6.800M	$6.336M
YoY Change	-50.0%	38.78%	36.4%
Acquisitions
YoY Change
Other Investing Activities	$33.10M	-$306.4M	-$177.5M
YoY Change	-110.8%	5907.84%	-6016.67%
Cash From Investing Activities	$29.70M	-$313.1M	-$183.9M
YoY Change	-109.49%	3031.0%	10923.02%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-91.10M	8.100M	$15.31M
YoY Change	-1224.69%	8.0%	-17.33%
NET CHANGE
Cash From Operating Activities	196.4M	130.6M	$195.5M
Cash From Investing Activities	29.70M	-313.1M	-$183.9M
Cash From Financing Activities	-91.10M	8.100M	$15.31M
Net Change In Cash	135.0M	-174.4M	$26.97M
YoY Change	-177.41%	-327.38%	-85.01%
FREE CASH FLOW
Cash From Operating Activities	$196.4M	$130.6M	$195.5M
Capital Expenditures	-$3.400M	-$6.800M	$6.336M
Free Cash Flow	$199.8M	$137.4M	$189.2M
YoY Change	45.41%	63.38%	19.59%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018Q4	anet	Allowance For Doubtful Accounts And Product Sales Return Reserve AllowanceForDoubtfulAccountsAndProductSalesReturnReserve	9120000	USD
CY2019Q2	anet	Allowance For Doubtful Accounts And Product Sales Return Reserve AllowanceForDoubtfulAccountsAndProductSalesReturnReserve	7488000	USD
CY2018Q2	anet	Restricted Cash Pledged As Collateral RestrictedCashPledgedAsCollateral	4000000	USD
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q2
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
	dei	Entity Central Index Key EntityCentralIndexKey	0001596532
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2019Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.0001
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2019Q2	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	1000000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	75668000	shares
CY2019Q2	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	76555000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	75668000	shares
CY2019Q2	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	76555000	shares
CY2018Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	0	USD
CY2019Q2	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	0	USD
CY2019Q2	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2018Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	10300000	USD
CY2018Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	1200000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
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CY2019Q2	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	100000000	shares
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	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2019-06-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-36468
	dei	Entity Registrant Name EntityRegistrantName	Arista Networks, Inc.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-1751121
	dei	Entity Address Address Line1 EntityAddressAddressLine1	5453 Great America Parkway
	dei	Entity Address City Or Town EntityAddressCityOrTown	Santa Clara
	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95054
	dei	City Area Code CityAreaCode	(408)
	dei	Local Phone Number LocalPhoneNumber	547-5500
	dei	Security12b Title Security12bTitle	Common Stock, $0.0001 par value
	dei	Trading Symbol TradingSymbol	ANET
	dei	Security Exchange Name SecurityExchangeName	NYSE
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	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	189158000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-155187000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	390076000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-10725000	USD
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.47
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.08
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.12
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.14
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.08
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.14
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76552000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74503000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76238000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74250000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	81335000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74503000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	81271000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74250000	shares
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	189251000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-155269000	USD
	us-gaap	Net Income Loss NetIncomeLoss	390280000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10731000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-272000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1167000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-37000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-814000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	2887000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	242000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	6066000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1799000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2615000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-925000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6029000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2613000	USD
CY2019Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	191866000	USD
CY2018Q2	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-156194000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	396309000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-13344000	USD
CY2019Q1	us-gaap	Stockholders Equity StockholdersEquity	2400367000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	2143389000	USD
CY2019Q2	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	0	USD
	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	3702000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	189251000	USD
	us-gaap	Net Income Loss NetIncomeLoss	390280000	USD
CY2019Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2615000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6029000	USD
CY2019Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	24297000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	48588000	USD
CY2019Q2	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	11781000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	38104000	USD
CY2019Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2812000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4662000	USD
CY2019Q2	anet	Adjustments To Additional Paid In Capital Vesting Of Stock Options And Restricted Stock AdjustmentsToAdditionalPaidInCapitalVestingOfStockOptionsAndRestrictedStock	69000	USD
	anet	Adjustments To Additional Paid In Capital Vesting Of Stock Options And Restricted Stock AdjustmentsToAdditionalPaidInCapitalVestingOfStockOptionsAndRestrictedStock	138000	USD
CY2019Q2	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	100008000	USD
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	100008000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	2525560000	USD
CY2019Q2	us-gaap	Stockholders Equity StockholdersEquity	2525560000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	1845039000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	1661914000	USD
CY2018Q2	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	0	USD
	us-gaap	Cumulative Effect On Retained Earnings Net Of Tax1 CumulativeEffectOnRetainedEarningsNetOfTax1	3574000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-155269000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10731000	USD
CY2018Q2	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-925000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2613000	USD
CY2018Q2	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	22478000	USD
	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	43329000	USD
CY2018Q2	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	11510000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	28810000	USD
CY2018Q2	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	2927000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4463000	USD
CY2018Q2	anet	Adjustments To Additional Paid In Capital Vesting Of Stock Options And Restricted Stock AdjustmentsToAdditionalPaidInCapitalVestingOfStockOptionsAndRestrictedStock	67000	USD
	anet	Adjustments To Additional Paid In Capital Vesting Of Stock Options And Restricted Stock AdjustmentsToAdditionalPaidInCapitalVestingOfStockOptionsAndRestrictedStock	153000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	1719973000	USD
CY2018Q2	us-gaap	Stockholders Equity StockholdersEquity	1719973000	USD
	us-gaap	Net Income Loss NetIncomeLoss	390280000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10731000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16757000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	11328000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	48588000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	43329000	USD
	anet	Noncash Lease Expense NoncashLeaseExpense	7955000	USD
	anet	Noncash Lease Expense NoncashLeaseExpense	0	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7914000	USD
	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-18281000	USD
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	1150000	USD
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-9100000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	4260000	USD
	us-gaap	Investment Income Net Amortization Of Discount And Premium InvestmentIncomeNetAmortizationOfDiscountAndPremium	783000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	11303000	USD
	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	13571000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	49620000	USD
	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-60759000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-48864000	USD
	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	72418000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	4635000	USD
	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-629000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-6783000	USD
	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3597000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-9476000	USD
	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-47153000	USD
	anet	Legal Settlement Charges LegalSettlementCharges	0	USD
	anet	Legal Settlement Charges LegalSettlementCharges	405000000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-85009000	USD
	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-50096000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	14399000	USD
	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	6653000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	3955000	USD
	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-1237000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	366476000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	326125000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	549383000	USD
	anet	Repayments Of Longterm Lease Financing Obligations RepaymentsOfLongtermLeaseFinancingObligations	0	USD
	anet	Repayments Of Longterm Lease Financing Obligations RepaymentsOfLongtermLeaseFinancingObligations	921000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-496972000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	552512000	USD
	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	222764000	USD
	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	696665000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8639000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13071000	USD
	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	0	USD
	us-gaap	Payments For Proceeds From Investments PaymentsForProceedsFromInvestments	8000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	2000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-5510000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	38104000	USD
	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	28810000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4662000	USD
	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	4463000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100008000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-66566000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	23426000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	72000	USD
	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-607000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	294472000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-148028000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	654164000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	864697000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	948636000	USD
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	716669000	USD
	anet	Right Of Use Asset Obtained In Exchange For Operating Lease Liability Recorded Upon Adoption RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityRecordedUponAdoption	93207000	USD
	anet	Right Of Use Asset Obtained In Exchange For Operating Lease Liability Recorded Upon Adoption RightOfUseAssetObtainedInExchangeForOperatingLeaseLiabilityRecordedUponAdoption	0	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	9130000	USD
	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1376000	USD
	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1077000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	31851000	USD
CY2019Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	24437000	USD
	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-top:8px;text-align:justify;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates </span></div><div style="line-height:120%;padding-top:8px;text-align:justify;text-indent:48px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of the accompanying condensed consolidated financial statements in conformity with GAAP requires us to make estimates and assumptions that affect the amounts reported and disclosed in the consolidated financial statements and accompanying notes. Those estimates and assumptions include, but are not limited to, revenue recognition and deferred revenue; allowance for doubtful accounts, sales rebates and return reserves; valuation of goodwill and acquisition-related intangible assets, accounting for income taxes, including the valuation allowance on deferred tax assets and reserves for uncertain tax positions; estimate of useful lives of long-lived assets including intangible assets; valuation of inventory and contract manufacturer/supplier liabilities; recognition and measurement of contingent liabilities; valuation of equity investments in privately-held companies; determination of fair value for stock-based awards; estimate of incremental borrowing rate for determining the present value of future lease payments; and valuation of warranty accruals. We evaluate our estimates and assumptions based on historical experience and other factors and adjust those estimates and assumptions when facts and circumstances dictate. Actual results could differ materially from those estimates.</span></div>
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75355000	USD
CY2019Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	42549000	USD
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	93207000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	126492000	USD
CY2019Q1	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	125327000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	30907000	USD
CY2019Q1	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	41056000	USD
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2019Q1	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	88230000	USD
CY2018Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	35431000	USD
CY2019Q1	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	0	USD
CY2019Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1194505000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1190803000	USD
CY2019Q2	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	526027000	USD
CY2019Q2	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	526027000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1308900000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4561000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	72000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1313389000	USD
CY2019Q2	anet	Other Assets Amortized Cost OtherAssetsAmortizedCost	4222000	USD
CY2019Q2	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	4222000	USD
CY2019Q2	anet	Cash Equivalents Marketable Securities And Other Assets Amortized Cost CashEquivalentsMarketableSecuritiesAndOtherAssetsAmortizedCost	1839149000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4561000	USD
CY2019Q2	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	72000	USD
CY2019Q2	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1843638000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents Fair Value Disclosure CashAndCashEquivalentsFairValueDisclosure	322080000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1307771000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	622000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2196000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1306197000	USD
CY2018Q4	anet	Other Assets Amortized Cost OtherAssetsAmortizedCost	4214000	USD
CY2018Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	4214000	USD
CY2018Q4	anet	Cash Equivalents Marketable Securities And Other Assets Amortized Cost CashEquivalentsMarketableSecuritiesAndOtherAssetsAmortizedCost	1634065000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	622000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2196000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1632491000	USD
	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2019Q2	us-gaap	Debt Securities Available For Sale Term DebtSecuritiesAvailableForSaleTerm	P24M
CY2019Q2	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	932285000	USD
CY2019Q2	anet	Available For Sale Securities Debt Maturities Year One Through Two Fair Value AvailableForSaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue	381104000	USD
CY2019Q2	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1313389000	USD
	anet	Marketable Securities Weighted Average Remaining Life MarketableSecuritiesWeightedAverageRemainingLife	P0Y9M18D
CY2019Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	944414000	USD
CY2018Q2	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	711157000	USD
CY2019Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	4222000	USD
CY2018Q2	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	5512000	USD
CY2019Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	948636000	USD
CY2018Q2	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	716669000	USD
CY2019Q2	anet	Restricted Cash Pledged As Collateral RestrictedCashPledgedAsCollateral	4000000.0	USD
CY2018Q2	anet	Restricted Cash Letter Of Credit RestrictedCashLetterOfCredit	1100000	USD
CY2019Q2	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	350568000	USD
CY2018Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	340897000	USD
CY2019Q2	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	837000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	507000	USD
CY2019Q2	anet	Product Return Reserve Current ProductReturnReserveCurrent	6651000	USD
CY2018Q4	anet	Product Return Reserve Current ProductReturnReserveCurrent	8613000	USD
CY2019Q2	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	343080000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	331777000	USD
CY2019Q2	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	105639000	USD
CY2018Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	76795000	USD
CY2019Q2	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	208538000	USD
CY2018Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	187762000	USD
CY2019Q2	us-gaap	Inventory Net InventoryNet	314177000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	264557000	USD
CY2019Q2	us-gaap	Prepaid Taxes PrepaidTaxes	43464000	USD
CY2018Q4	us-gaap	Prepaid Taxes PrepaidTaxes	38636000	USD
CY2019Q2	anet	Inventory Deposit Current InventoryDepositCurrent	14250000	USD
CY2018Q4	anet	Inventory Deposit Current InventoryDepositCurrent	14639000	USD
CY2019Q2	us-gaap	Other Assets Current OtherAssetsCurrent	43665000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	95730000	USD
CY2019Q2	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	12079000	USD
CY2018Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	13316000	USD
CY2019Q2	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	113458000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	162321000	USD
CY2019Q2	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	129046000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	165367000	USD
CY2019Q2	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	88023000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	90012000	USD
CY2019Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	41023000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75355000	USD
CY2019Q2	us-gaap	Depreciation Depreciation	4800000	USD
CY2018Q2	us-gaap	Depreciation Depreciation	5400000	USD
	us-gaap	Depreciation Depreciation	9500000	USD
	us-gaap	Depreciation Depreciation	10700000	USD
CY2019Q2	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	55957000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	70755000	USD
CY2019Q2	anet	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	30318000	USD
CY2018Q4	anet	Accrued Manufacturing Costs Current AccruedManufacturingCostsCurrent	31336000	USD
CY2019Q2	anet	Accrued Product Development Costs Current AccruedProductDevelopmentCostsCurrent	12189000	USD
CY2018Q4	anet	Accrued Product Development Costs Current AccruedProductDevelopmentCostsCurrent	6988000	USD
CY2019Q2	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	6312000	USD
CY2018Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	5678000	USD
CY2019Q2	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	5074000	USD
CY2018Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	5362000	USD
CY2019Q2	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	4048000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	3135000	USD
CY2019Q2	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	113898000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	123254000	USD
CY2018Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	5362000	USD
CY2017Q4	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	7415000	USD
	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	2082000	USD
	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	3813000	USD
	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	2370000	USD
	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	3046000	USD
CY2019Q2	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	5074000	USD
CY2018Q2	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	8182000	USD
CY2017Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	USD
CY2019Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	1668000	USD
CY2018Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	6959000	USD
CY2019Q1	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	5699000	USD
CY2018Q1	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	0	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	6341000	USD
CY2018Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	6959000	USD
CY2019Q2	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	1668000	USD
	anet	Contract With Customer Liability Contract Liabilities Recognized ContractWithCustomerLiabilityContractLiabilitiesRecognized	10122000	USD
CY2019Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	37314000	USD
CY2018Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	18838000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	32595000	USD
CY2017Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	16521000	USD
CY2019Q2	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	3552000	USD
CY2018Q2	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1933000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	6766000	USD
	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	4070000	USD
CY2019Q2	anet	Contract With Customer Liability Beginning Balance Reclassified To Deferred Revenue ContractWithCustomerLiabilityBeginningBalanceReclassifiedToDeferredRevenue	1593000	USD
CY2018Q2	anet	Contract With Customer Liability Beginning Balance Reclassified To Deferred Revenue ContractWithCustomerLiabilityBeginningBalanceReclassifiedToDeferredRevenue	906000	USD
	anet	Contract With Customer Liability Beginning Balance Reclassified To Deferred Revenue ContractWithCustomerLiabilityBeginningBalanceReclassifiedToDeferredRevenue	1205000	USD
	anet	Contract With Customer Liability Beginning Balance Reclassified To Deferred Revenue ContractWithCustomerLiabilityBeginningBalanceReclassifiedToDeferredRevenue	731000	USD
CY2019Q2	anet	Contract With Customer Liability Contract Liabilities Recognized ContractWithCustomerLiabilityContractLiabilitiesRecognized	9857000	USD
CY2018Q2	anet	Contract With Customer Liability Contract Liabilities Recognized ContractWithCustomerLiabilityContractLiabilitiesRecognized	5843000	USD
	anet	Contract With Customer Liability Contract Liabilities Recognized ContractWithCustomerLiabilityContractLiabilitiesRecognized	17402000	USD
CY2019Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	42026000	USD
CY2018Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	21842000	USD
CY2019Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	42026000	USD
CY2018Q2	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	21842000	USD
CY2019Q1	us-gaap	Deferred Revenue DeferredRevenue	536471000	USD
CY2018Q1	us-gaap	Deferred Revenue DeferredRevenue	456054000	USD
CY2018Q4	us-gaap	Deferred Revenue DeferredRevenue	587227000	USD
CY2017Q4	us-gaap	Deferred Revenue DeferredRevenue	498740000	USD
CY2019Q2	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	119542000	USD
CY2018Q2	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	112998000	USD
	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	253616000	USD
	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	238557000	USD
CY2019Q2	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	85289000	USD
CY2018Q2	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	105588000	USD
	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	168607000	USD
	us-gaap	Deferred Revenue Period Increase Decrease DeferredRevenuePeriodIncreaseDecrease	188461000	USD
CY2019Q2	us-gaap	Deferred Revenue DeferredRevenue	502218000	USD
CY2018Q2	us-gaap	Deferred Revenue DeferredRevenue	448644000	USD
CY2019Q2	us-gaap	Deferred Revenue DeferredRevenue	502218000	USD
CY2018Q2	us-gaap	Deferred Revenue DeferredRevenue	448644000	USD
CY2019Q2	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	545700000	USD
CY2019Q2	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.83
CY2019Q2	us-gaap	Revenue Remaining Performance Obligation Percentage RevenueRemainingPerformanceObligationPercentage	0.17
CY2019Q2	us-gaap	Interest Income Other InterestIncomeOther	13107000	USD
CY2018Q2	us-gaap	Interest Income Other InterestIncomeOther	7964000	USD
	us-gaap	Interest Income Other InterestIncomeOther	25005000	USD
	us-gaap	Interest Income Other InterestIncomeOther	13348000	USD
CY2019Q2	us-gaap	Interest Expense InterestExpense	0	USD
CY2018Q2	us-gaap	Interest Expense InterestExpense	680000	USD
	us-gaap	Interest Expense InterestExpense	0	USD
	us-gaap	Interest Expense InterestExpense	1367000	USD
CY2019Q2	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	0	USD
CY2018Q2	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-9100000	USD
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	1150000	USD
	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-9100000	USD
CY2019Q2	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	704000	USD
CY2018Q2	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-353000	USD
	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-11000	USD
	us-gaap	Other Nonoperating Gains Losses OtherNonoperatingGainsLosses	-894000	USD
CY2019Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	13811000	USD
CY2018Q2	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-2169000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	26144000	USD
	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	1987000	USD
CY2019Q2	anet	Equity Securities Without Readily Determinable Fair Value Initial Costs EquitySecuritiesWithoutReadilyDeterminableFairValueInitialCosts	44136000	USD
CY2018Q4	anet	Equity Securities Without Readily Determinable Fair Value Initial Costs EquitySecuritiesWithoutReadilyDeterminableFairValueInitialCosts	44136000	USD
CY2019Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount	15000000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount	15000000	USD
CY2019Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	2350000	USD
	us-gaap	Variable Lease Cost VariableLeaseCost	2995000	USD
CY2019Q2	us-gaap	Operating Lease Expense OperatingLeaseExpense	7146000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	1200000	USD
CY2019Q2	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	31486000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	30336000	USD
CY2019Q2	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	0	USD
	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	1200000	USD
	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	1200000	USD
	us-gaap	Equity Securities Without Readily Determinable Fair Value Impairment Loss Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueImpairmentLossAnnualAmount	10300000	USD
CY2013Q3	anet	Lessee Leasing Arrangements Financing Obligation Term Of Contract LesseeLeasingArrangementsFinancingObligationTermOfContract	P120M
CY2019Q2	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	94203000	USD
CY2019Q2	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	14666000	USD
CY2019Q2	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	89705000	USD
CY2019Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	104371000	USD
CY2019Q2	us-gaap	Operating Lease Cost OperatingLeaseCost	5615000	USD
	us-gaap	Operating Lease Cost OperatingLeaseCost	11098000	USD
CY2019Q2	us-gaap	Variable Lease Cost VariableLeaseCost	1531000	USD
	us-gaap	Operating Lease Expense OperatingLeaseExpense	14093000	USD
CY2019Q2	us-gaap	Operating Lease Payments OperatingLeasePayments	4600000	USD
	us-gaap	Operating Lease Payments OperatingLeasePayments	9000000.0	USD
CY2018Q2	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	2900000	USD
	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5700000	USD
CY2019Q2	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y2M12D
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Remainder Of Fiscal Year LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	9458000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	20042000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	20800000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	21153000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	17498000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	35870000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	124821000	USD
CY2019Q2	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	20450000	USD
CY2019Q2	us-gaap	Operating Lease Liability OperatingLeaseLiability	104371000	USD
CY2019Q2	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.051
CY2019Q2	us-gaap	Purchase Commitment Remaining Minimum Amount Committed PurchaseCommitmentRemainingMinimumAmountCommitted	230900000	USD
CY2019Q2	anet	Restricted Deposits Assets RestrictedDepositsAssets	17000000.0	USD
CY2018Q4	anet	Restricted Deposits Assets RestrictedDepositsAssets	17400000	USD
CY2019Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1000000000.0	USD
CY2019Q2	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	900000000.0	USD
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	29.39
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	14000	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	32.22
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	4961000	shares
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	41.57
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y9M18D
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1081820000	USD
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2628000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5899000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	37.09
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P5Y2M12D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	1027741000	USD
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	76000	shares
	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	226.53
	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	1000000	shares
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	26.75
	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P4Y3M18D
CY2019Q2	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	612008000	USD
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	15386000	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	76000	shares
	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	14000	shares
	anet	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Shares Traded For Taxes ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsSharesTradedForTaxes	18000	shares
CY2019Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	15108000	shares
CY2019Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	24297000	USD
CY2018Q2	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	22478000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	48588000	USD
	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	43329000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	189251000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-155269000	USD
	us-gaap	Net Income Loss NetIncomeLoss	390280000	USD
	us-gaap	Net Income Loss NetIncomeLoss	-10731000	USD
CY2019Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	99000	USD
CY2018Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-82000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	217000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	-6000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	189152000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-155187000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	390063000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-10725000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	189152000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-155187000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	390063000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-10725000	USD
CY2019Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	6000	USD
CY2018Q2	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	13000	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	189158000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-155187000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	390076000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-10725000	USD
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76552000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74503000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76238000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74250000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76552000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74503000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	76238000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74250000	shares
CY2019Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	4775000	shares
CY2018Q2	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	5025000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019Q2	anet	Incremental Common Shares Attributable To Dilutive Effect Of Employee Stock Purchase Plan IncrementalCommonSharesAttributableToDilutiveEffectOfEmployeeStockPurchasePlan	8000	shares
CY2018Q2	anet	Incremental Common Shares Attributable To Dilutive Effect Of Employee Stock Purchase Plan IncrementalCommonSharesAttributableToDilutiveEffectOfEmployeeStockPurchasePlan	0	shares
	anet	Incremental Common Shares Attributable To Dilutive Effect Of Employee Stock Purchase Plan IncrementalCommonSharesAttributableToDilutiveEffectOfEmployeeStockPurchasePlan	8000	shares
	anet	Incremental Common Shares Attributable To Dilutive Effect Of Employee Stock Purchase Plan IncrementalCommonSharesAttributableToDilutiveEffectOfEmployeeStockPurchasePlan	0	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	81335000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74503000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	81271000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	74250000	shares
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.47
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.08
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.12
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.14
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.33
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.08
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	4.80
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.14
CY2019Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	226000	shares
CY2018Q2	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8156000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	247000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	8300000	shares
CY2019Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	220648000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-241972000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	427323000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-99078000	USD
CY2019Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	31397000	USD
CY2018Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-86703000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	37043000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-88347000	USD
CY2019Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.142
CY2018Q2	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.358
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.087
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.892
CY2019Q2	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	9800000	USD
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	608321000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	519845000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1203745000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	992334000	USD
CY2019Q2	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	41023000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	75355000	USD

Files In Submission

Name	View Source	Status
0001596532-19-000184-index-headers.html	Edgar Link	pending
0001596532-19-000184-index.html	Edgar Link	pending
0001596532-19-000184.txt	Edgar Link	pending
0001596532-19-000184-xbrl.zip	Edgar Link	pending
anet-20190630.xsd	Edgar Link	pending
anet-20190630_cal.xml	Edgar Link	unprocessable
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anet-20190630_lab.xml	Edgar Link	unprocessable
anet-20190630_pre.xml	Edgar Link	unprocessable
anet20190630-10q.htm	Edgar Link	pending
anet20190630-10q_htm.xml	Edgar Link	completed
ex311ceocertificationq.htm	Edgar Link	pending
ex312cfocertificationq.htm	Edgar Link	pending
ex321ceoandcfo906certi.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
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report.css	Edgar Link	pending
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$ANET
Arista Networks, Inc. Stock $anet

2019 Q2 Form 10-Q Financial Statement

#000159653219000184 Filed on August 02, 2019

Income Statement

Balance Sheet

Cashflow Statement

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$ANET Arista Networks, Inc. Stock $anet

2019 Q2 Form 10-Q Financial Statement

#000159653219000184 Filed on August 02, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ANET
Arista Networks, Inc. Stock $anet