$DXCM
DEXCOM INC Stock $dxcm

$dxcm Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000109355720000029 Filed on February 13, 2020

Income Statement

Concept	2019 Q4	2018 Q4	2018 Q3
Revenue	$462.8M	$338.0M	$266.7M
YoY Change	36.92%	52.94%	44.47%
Cost Of Revenue	$149.5M	$115.2M	$98.10M
YoY Change	29.77%	70.67%	70.31%
Gross Profit	$309.3M	$222.8M	$168.6M
YoY Change	38.82%	45.15%	32.76%
Gross Profit Margin	66.83%	65.92%	63.22%
Selling, General & Admin	$129.0M	$112.1M	$104.6M
YoY Change	15.08%	20.8%	24.23%
% of Gross Profit	41.71%	50.31%	62.04%
Research & Development	$78.80M	$275.3M	$50.10M
YoY Change	-71.38%	465.3%	15.7%
% of Gross Profit	25.48%	123.56%	29.72%
Depreciation & Amortization	$14.30M	$8.600M	$7.800M
YoY Change	66.28%	-46.58%	81.4%
% of Gross Profit	4.62%	3.86%	4.63%
Operating Expenses	$207.8M	$387.4M	$154.7M
YoY Change	-46.36%	173.78%	21.33%
Operating Profit	$101.5M	-$164.6M	$13.90M
YoY Change	-161.66%	-1471.67%	-2880.0%
Interest Expense	-$7.200M	-$16.90M	$4.900M
YoY Change	-57.4%	412.12%	8.89%
% of Operating Profit	-7.09%		35.25%
Other Income/Expense, Net		$4.600M	$900.0K
YoY Change		-4700.0%	-30.77%
Pretax Income	$94.30M	-$176.9M	$44.80M
YoY Change	-153.31%	-1526.61%	-1892.0%
Income Tax	$1.600M	$3.200M	-$1.800M
% Of Pretax Income	1.7%		-4.02%
Net Earnings	$92.70M	-$179.7M	$46.60M
YoY Change	-151.59%	1811.7%	-2430.0%
Net Earnings / Revenue	20.03%	-53.17%	17.47%
Basic Earnings Per Share	$1.01	-$2.03	$0.53
Diluted Earnings Per Share	$1.00	-$2.03	$0.52
COMMON SHARES
Basic Shares Outstanding	91.53M shares	88.84M shares	88.50M shares
Diluted Shares Outstanding			90.30M shares

Balance Sheet

Concept	2019 Q4	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.533B	$1.230B	$625.9M
YoY Change	24.69%	124.15%	19.04%
Cash & Equivalents	$446.2M	$1.137B	$367.4M
Short-Term Investments	$1.087B	$92.70M	$258.5M
Other Short-Term Assets	$30.00M	$16.50M	$20.40M
YoY Change	81.82%	-0.6%	53.38%
Inventory	$119.8M	$70.70M	$55.20M
Prepaid Expenses
Receivables	$286.3M	$226.7M	$169.8M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.969B	$1.700B	$914.1M
YoY Change	15.88%	128.21%	31.92%
LONG-TERM ASSETS
Property, Plant & Equipment	$321.3M	$183.1M	$169.6M
YoY Change	75.48%	25.76%	24.61%
Goodwill	$18.60M	$18.70M	$18.40M
YoY Change	-0.53%	54.55%	53.33%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$14.20M	$14.70M	$12.20M
YoY Change	-3.4%	764.71%	542.11%
Total Long-Term Assets	$425.6M	$216.5M	$200.2M
YoY Change	96.58%	35.82%	33.47%
TOTAL ASSETS
Total Short-Term Assets	$1.969B	$1.700B	$914.1M
Total Long-Term Assets	$425.6M	$216.5M	$200.2M
Total Assets	$2.395B	$1.916B	$1.114B
YoY Change	25.0%	111.92%	32.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$102.3M	$75.50M	$57.70M
YoY Change	35.5%	61.67%	147.64%
Accrued Expenses	$255.6M	$144.0M	$132.7M
YoY Change	77.5%	61.8%	43.3%
Deferred Revenue	$1.700M	$2.900M
YoY Change	-41.38%	-9.38%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$600.0K
YoY Change
Total Short-Term Liabilities	$360.2M	$222.4M	$193.9M
YoY Change	61.96%	60.12%	64.04%
LONG-TERM LIABILITIES
Long-Term Debt	$1.074B	$1.018B	$346.1M
YoY Change	5.55%	204.4%	4.66%
Other Long-Term Liabilities	$20.10M	$20.00M	$19.40M
YoY Change	0.5%	9.89%	16.17%
Total Long-Term Liabilities	$20.10M	$20.00M	$19.40M
YoY Change	0.5%	9.89%	16.17%
TOTAL LIABILITIES
Total Short-Term Liabilities	$360.2M	$222.4M	$193.9M
Total Long-Term Liabilities	$20.10M	$20.00M	$19.40M
Total Liabilities	$1.512B	$1.253B	$552.1M
YoY Change	20.73%	158.45%	20.31%
SHAREHOLDERS EQUITY
Retained Earnings	-$695.7M	-$798.9M	-$619.2M
YoY Change	-12.92%	18.92%	-6.52%
Common Stock	$1.676B	$1.561B	$1.182B
YoY Change	7.39%	42.69%	12.69%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$100.0M	$100.0M
YoY Change	0.0%
Treasury Stock Shares	800.0K shares	800.0K shares
Shareholders Equity	$882.6M	$663.3M	$562.2M
YoY Change
Total Liabilities & Shareholders Equity	$2.395B	$1.916B	$1.114B
YoY Change	25.0%	111.92%	32.2%

Cashflow Statement

Concept	2019 Q4	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	$92.70M	-$179.7M	$46.60M
YoY Change	-151.59%	1811.7%	-2430.0%
Depreciation, Depletion And Amortization	$14.30M	$8.600M	$7.800M
YoY Change	66.28%	-46.58%	81.4%
Cash From Operating Activities	$143.7M	$33.70M	$56.80M
YoY Change	326.41%	-18.2%	56.91%
INVESTING ACTIVITIES
Capital Expenditures	-$44.10M	-$17.70M	-$23.80M
YoY Change	149.15%	0.57%	76.3%
Acquisitions
YoY Change
Other Investing Activities	-$50.20M	$48.60M	$28.40M
YoY Change	-203.29%	194.55%	-222.94%
Cash From Investing Activities	-$94.30M	$30.90M	$4.600M
YoY Change	-405.18%	-2909.09%	-112.57%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-100.0K	701.6M	5.400M
YoY Change	-100.01%	701500.0%	25.58%
NET CHANGE
Cash From Operating Activities	143.7M	33.70M	56.80M
Cash From Investing Activities	-94.30M	30.90M	4.600M
Cash From Financing Activities	-100.0K	701.6M	5.400M
Net Change In Cash	49.30M	766.2M	66.80M
YoY Change	-93.57%	1805.97%	1612.82%
FREE CASH FLOW
Cash From Operating Activities	$143.7M	$33.70M	$56.80M
Capital Expenditures	-$44.10M	-$17.70M	-$23.80M
Free Cash Flow	$187.8M	$51.40M	$80.60M
YoY Change	265.37%	-12.59%	62.17%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001093557
CY2018Q4	dxcm	Fair Value Assets Level3 Transfers Amount FairValueAssetsLevel3TransfersAmount	0	USD
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	91100000	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	92400000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	90000000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	91600000	shares
CY2018Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2017	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2018	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019	dei	Entity File Number EntityFileNumber	000-51222
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019	dei	Entity Registrant Name EntityRegistrantName	DEXCOM, INC.
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	800000	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	33-0857544
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92121
CY2019	dei	City Area Code CityAreaCode	858
CY2019	dei	Local Phone Number LocalPhoneNumber	200-0200
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.001 Par Value Per Share
CY2019	dei	Trading Symbol TradingSymbol	DXCM
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2019	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	0	USD
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	6340 Sequence Drive
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	20100000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	20000000.0	USD
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	13556600000	USD
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CY2019Q4	dxcm	Debt Securities Available For Sale And Equity Securities DebtSecuritiesAvailableForSaleAndEquitySecurities	1087100000	USD
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CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	30000000.0	USD
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CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	321300000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	183100000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	71500000	USD
CY2018Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	0	USD
CY2019Q4	us-gaap	Goodwill Goodwill	18600000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	18700000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	14200000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	14700000	USD
CY2019Q4	us-gaap	Assets Assets	2395000000.0	USD
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CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	88500000	USD
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CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	13600000	USD
CY2018Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	0	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	1700000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2900000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	360200000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	222400000	USD
CY2018Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	100000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	1675900000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	1512400000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	1252700000	USD
CY2018Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2019Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	100000	USD
CY2019Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	1059700000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017	dxcm	Effective Income Tax Reconciliation Permanent Items EffectiveIncomeTaxReconciliationPermanentItems	700000	USD
CY2018Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	1010300000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	72400000	USD
CY2019Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
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CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	100000000.0	USD
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CY2019	dxcm	Collaborative Research And Development Fee CollaborativeResearchAndDevelopmentFee	0	USD
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CY2017	dxcm	Collaborative Research And Development Fee CollaborativeResearchAndDevelopmentFee	0	USD
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CY2018	us-gaap	Operating Expenses OperatingExpenses	850200000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	534600000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	142300000	USD
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CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-42500000	USD
CY2019	us-gaap	Interest Expense InterestExpense	60300000	USD
CY2017	us-gaap	Interest Expense InterestExpense	12800000	USD
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CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
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CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-200000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	800000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4100000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1600000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	101900000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-123000000.0	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-51800000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	283800000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	2700000	USD
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	7400000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	106700000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-50200000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-1600000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	419400000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	1900000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	8900000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	101900000	USD
CY2018	us-gaap	Stock Issued During Period Value Purchase Of Assets StockIssuedDuringPeriodValuePurchaseOfAssets	217700000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	183800000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	-218900000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	100000000.0	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-127100000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	4100000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	663300000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	300000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	11600000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	102700000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Convertible Debt With Conversion Feature AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature	700000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	800000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	882600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-127100000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-50200000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	48700000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	29100000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16100000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	102700000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	101900000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	106200000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	49600000	USD
CY2018	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	17900000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	9400000	USD
CY2019	dxcm	R Dexpensethroughissuanceofcommonstock RDexpensethroughissuanceofcommonstock	0	USD
CY2018	dxcm	R Dexpensethroughissuanceofcommonstock RDexpensethroughissuanceofcommonstock	217700000	USD
CY2017	dxcm	R Dexpensethroughissuanceofcommonstock RDexpensethroughissuanceofcommonstock	0	USD
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	0	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	36000000.0	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	0	USD
CY2017	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	0	USD
CY2019	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	-4200000	USD
CY2018	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	44100000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2100000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-4700000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-7900000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	60000000.0	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	93200000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	31800000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	49100000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	25500000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-400000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7200000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	3000000.0	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	6700000	USD
CY2019	dxcm	Increase Decreasein Operating Lease Assetsand Liabilities Net IncreaseDecreaseinOperatingLeaseAssetsandLiabilitiesNet	2400000	USD
CY2018	dxcm	Increase Decreasein Operating Lease Assetsand Liabilities Net IncreaseDecreaseinOperatingLeaseAssetsandLiabilitiesNet	0	USD
CY2017	dxcm	Increase Decreasein Operating Lease Assetsand Liabilities Net IncreaseDecreaseinOperatingLeaseAssetsandLiabilitiesNet	0	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	109000000.0	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	56200000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	21100000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	16000000.0	USD
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	23800000	USD
CY2017	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	14800000	USD
CY2019	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	-200000	USD
CY2018	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	800000	USD
CY2017	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	4800000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	314500000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	123200000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	92000000.0	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2030400000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	452500000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	171800000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	1196400000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	392100000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	93400000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1200000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	1000000.0	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	0	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	180000000.0	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	67100000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	66000000.0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	94500000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	11300000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1015200000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-139800000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-144400000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	11900000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	10800000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	10100000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	100000000.0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	836600000	USD
CY2017	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	389000000.0	USD
CY2019	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	183800000	USD
CY2017	us-gaap	Proceeds From Issuance Of Warrants ProceedsFromIssuanceOfWarrants	0	USD
CY2019	dxcm	Purchaseof Convertible Note Hedge PurchaseofConvertibleNoteHedge	0	USD
CY2018	dxcm	Purchaseof Convertible Note Hedge PurchaseofConvertibleNoteHedge	218900000	USD
CY2017	dxcm	Purchaseof Convertible Note Hedge PurchaseofConvertibleNoteHedge	0	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	75000000.0	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2017	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	75000000.0	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1200000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1900000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	10700000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	710400000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	399100000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-700000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1800000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	300000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-690700000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	695600000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	347000000.0	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1137100000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	441500000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	446400000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1137100000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	441500000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	446200000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1137000000.0	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	441500000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	200000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	100000	USD
CY2017Q4	us-gaap	Restricted Cash RestrictedCash	0	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	446400000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1137100000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	441500000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	14200000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	10800000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	6300000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	10400000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	3600000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	2400000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	4800000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	2300000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	1400000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	<div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"/></tr><tr><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/></tr><tr><td colspan="5" style="vertical-align:bottom;border-bottom:1px dotted #58a618;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;color:#58a618;font-style:italic;font-weight:bold;">Organization and Business</span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-indent:30px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">DexCom, Inc. is a medical device company focused on the design, development and commercialization of CGM system(s) for use by people with diabetes and by healthcare providers. Unless the context requires otherwise, the terms “we,” “us,” “our,” the “company,” or “DexCom” refer to DexCom, Inc. and its subsidiaries.</span></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:center;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"/></tr><tr><td style="width:18%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:22%;"/></tr><tr><td colspan="5" style="vertical-align:bottom;border-bottom:1px dotted #58a618;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;color:#58a618;font-style:italic;font-weight:bold;">Basis of Presentation and Principles of Consolidation</span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"/></tr><tr><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/></tr><tr><td colspan="5" style="vertical-align:bottom;border-bottom:1px dotted #58a618;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;color:#58a618;font-style:italic;font-weight:bold;">Use of Estimates</span></div></td></tr></table></div><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles, or GAAP, requires us to make certain estimates and assumptions that affect the amounts reported in our financial statements and the disclosures made in the accompanying notes. Areas requiring significant estimates include pharmacy rebates, transaction price, net accounts receivable, excess or obsolete inventories and the valuation of inventory, and accruals for litigation contingencies. Despite our intention to establish accurate estimates and use reasonable assumptions, actual results may differ from our estimates.</span></div>
CY2019	dxcm	Maturity Threshold Of Investments Classified To Cash Equivalents MaturityThresholdOfInvestmentsClassifiedToCashEquivalents	P90D
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:99.609375%;border-collapse:collapse;text-align:left;"><tr><td colspan="5"/></tr><tr><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/><td style="width:20%;"/></tr><tr><td colspan="5" style="vertical-align:bottom;border-bottom:1px dotted #58a618;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;color:#58a618;font-style:italic;font-weight:bold;">Concentration of Credit Risk and Significant Customers</span></div></td></tr></table></div></div><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-indent:32px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Financial instruments which potentially subject us to concentrations of credit risk consist primarily of cash, cash equivalents, short-term marketable securities, and accounts receivable. We limit our exposure to credit risk by placing our cash and investments with high credit quality financial institutions. We have also established guidelines regarding diversification of our investments and their maturities that are designed to maintain principal and maximize liquidity. We review these guidelines periodically and modify them to take advantage of trends in yields and interest rates and changes in our operations and financial position. </span></div>
CY2019	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2019	dxcm	Revenue Recognition Sales Returns Coverage Period RevenueRecognitionSalesReturnsCoveragePeriod	P30D
CY2019Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	3600000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	2600000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	1900000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	2100000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	0	USD
CY2019	dxcm	Amortization Period For Incentive Compensation Costs AmortizationPeriodForIncentiveCompensationCosts	P1Y
CY2019	us-gaap	Advertising Expense AdvertisingExpense	31800000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	25400000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	21900000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-127100000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-50200000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.11
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.44
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.58
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.10
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.44
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.58
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91100000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	88200000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86300000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92300000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88200000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	86300000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14600000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	17200000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7100000	shares
CY2019Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	255000000.0	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1087100000	USD
CY2019Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	700000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	1342800000	USD
CY2018Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	266000000.0	USD
CY2018Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	38000000.0	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	210600000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	514600000	USD
CY2019Q4	us-gaap	Fair Value Assets Level1 To Level2 Transfers Amount FairValueAssetsLevel1ToLevel2TransfersAmount	0	USD
CY2019Q4	dxcm	Fair Value Assets Level3 Transfers Amount FairValueAssetsLevel3TransfersAmount	0	USD
CY2019	us-gaap	Goodwill And Intangible Asset Impairment GoodwillAndIntangibleAssetImpairment	0	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1086700000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	500000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1087100000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni Cost EquitySecuritiesFvNiCost	2000000.0	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Gain EquitySecuritiesFvNiUnrealizedGain	36000000.0	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Loss EquitySecuritiesFvNiUnrealizedLoss	0	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	38000000.0	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	210700000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	210600000	USD
CY2018Q4	dxcm	Debt Securities Available For Sale And Equity Securities Amortized Cost DebtSecuritiesAvailableForSaleAndEquitySecuritiesAmortizedCost	212700000	USD
CY2018	dxcm	Debt Securities Available For Sale And Equity Securities Unrealized Gain DebtSecuritiesAvailableForSaleAndEquitySecuritiesUnrealizedGain	36000000.0	USD
CY2018	dxcm	Debt Securities Available For Sale And Equity Securities Unrealized Loss DebtSecuritiesAvailableForSaleAndEquitySecuritiesUnrealizedLoss	100000	USD
CY2018Q4	dxcm	Debt Securities Available For Sale And Equity Securities DebtSecuritiesAvailableForSaleAndEquitySecurities	248600000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Term DebtSecuritiesAvailableForSaleTerm	P12M
CY2019	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-4200000	USD
CY2018	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	80100000	USD
CY2017	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	0	USD
CY2019	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	-4200000	USD
CY2018	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	44100000	USD
CY2017	us-gaap	Debt And Equity Securities Realized Gain Loss DebtAndEquitySecuritiesRealizedGainLoss	0	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	7400000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	6800000	USD
CY2018Q4	dxcm	Financing Lease Obligation FinancingLeaseObligation	7300000	USD
CY2019	us-gaap	Debt And Equity Securities Unrealized Gain Loss DebtAndEquitySecuritiesUnrealizedGainLoss	0	USD
CY2018	us-gaap	Debt And Equity Securities Unrealized Gain Loss DebtAndEquitySecuritiesUnrealizedGainLoss	36000000.0	USD
CY2017	us-gaap	Debt And Equity Securities Unrealized Gain Loss DebtAndEquitySecuritiesUnrealizedGainLoss	0	USD
CY2019Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	292100000	USD
CY2018Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	233900000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5800000	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	7200000	USD
CY2019Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	286300000	USD
CY2018Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	226700000	USD
CY2019Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	64900000	USD
CY2018Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	30800000	USD
CY2019Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	11100000	USD
CY2018Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	11200000	USD
CY2019Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	43800000	USD
CY2018Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	28700000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	119800000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	70700000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	426300000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	262900000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	105000000.0	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	79800000	USD
CY2019Q4	dxcm	Financing Lease Obligation FinancingLeaseObligation	14400000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	321300000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	183100000	USD
CY2019	us-gaap	Depreciation Depreciation	46900000	USD
CY2018	us-gaap	Depreciation Depreciation	28600000	USD
CY2017	us-gaap	Depreciation Depreciation	16100000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-10500000	USD
CY2018	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-5400000	USD
CY2017	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-11000000.0	USD
CY2019Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	102300000	USD
CY2018Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	75500000	USD
CY2019Q4	dxcm	Accrued Tax Audit And Legal Fees AccruedTaxAuditAndLegalFees	14000000.0	USD
CY2018Q4	dxcm	Accrued Tax Audit And Legal Fees AccruedTaxAuditAndLegalFees	11700000	USD
CY2019Q4	dxcm	Pharmacy Rebates PharmacyRebates	93300000	USD
CY2018Q4	dxcm	Pharmacy Rebates PharmacyRebates	36100000	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	7400000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	6800000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	39400000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	17000000.0	USD
CY2019Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	256400000	USD
CY2018Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	147100000	USD
	us-gaap	Restructuring Charges RestructuringCharges	8000000.0	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	6800000	USD
CY2017Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	8800000	USD
CY2019	dxcm	Standard Product Warranty Accrual Charges To Costs And Expenses StandardProductWarrantyAccrualChargesToCostsAndExpenses	32700000	USD
CY2018	dxcm	Standard Product Warranty Accrual Charges To Costs And Expenses StandardProductWarrantyAccrualChargesToCostsAndExpenses	17400000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	32100000	USD
CY2018	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	19400000	USD
CY2018Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	9400000	USD
CY2019Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	5700000	USD
CY2018Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	3300000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	20100000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	20000000.0	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	58800000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	21300000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	11100000	USD
CY2019Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	195600000	USD
CY2019Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	26700000	USD
CY2019Q1	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	15300000	USD
CY2019Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	40400000	USD
CY2019Q1	us-gaap	Finance Lease Liability FinanceLeaseLiability	15900000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	600000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	17400000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1300000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	17400000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1300000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	14600000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1400000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	14300000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	1400000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	12500000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	1500000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	23900000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	13900000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	100100000	USD
CY2019Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	20800000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	14300000	USD
CY2019Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	5800000	USD
CY2019Q4	dxcm	Operating Lease Liability Less Payments Due On Short Term Leases Not Recorded As A Liability OperatingLeaseLiabilityLessPaymentsDueOnShortTermLeasesNotRecordedAsALiability	85800000	USD
CY2019Q4	dxcm	Finance Leases Liability Less Payments Due On Short Term Leases Not Recorded As A Liability FinanceLeasesLiabilityLessPaymentsDueOnShortTermLeasesNotRecordedAsALiability	15000000.0	USD
CY2019Q4	dxcm	Lessee Operating Leases Short Term Lease Payments Due LesseeOperatingLeasesShortTermLeasePaymentsDue	200000	USD
CY2019Q4	dxcm	Finance Lease Short Term Leases Payments Due FinanceLeaseShortTermLeasesPaymentsDue	0	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	86000000.0	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	15000000.0	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	13600000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	72400000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	14400000	USD
CY2019	dxcm	Lessee Future Lease Cost Lease Notyet Commenced LesseeFutureLeaseCostLeaseNotyetCommenced	5500000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1100000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	800000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	12200000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3500000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	3900000	USD
CY2019	us-gaap	Lease Cost LeaseCost	21500000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	12500000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	11100000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	14300000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	800000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	500000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	80600000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	15500000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y2M12D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P13Y3M18D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.050
CY2019	dxcm	Lessee Operating Leases Lease Cost Amortization LesseeOperatingLeasesLeaseCostAmortization	9100000	USD
CY2019Q4	us-gaap	Recorded Unconditional Purchase Obligation Due Within One Year RecordedUnconditionalPurchaseObligationDueWithinOneYear	165800000	USD
CY2019	dxcm	Recorded Unconditional Purchase Obligation Due Within One Year Maximum Term RecordedUnconditionalPurchaseObligationDueWithinOneYearMaximumTerm	P1Y
CY2019Q4	us-gaap	Litigation Reserve LitigationReserve	0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	119100000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-28300000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	12400000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-14900000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-98200000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-61000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	104200000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-126500000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-48600000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1000000.0	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2700000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	100000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1900000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	100000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1500000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2900000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2800000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1600000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1700000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-500000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	200000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	200000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-2200000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3100000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	600000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1600000	USD
CY2019	dxcm	Unused Expired Federal Income Tax Credits UnusedExpiredFederalIncomeTaxCredits	2100000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	332200000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	127400000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	162000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	57100000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Other DeferredTaxAssetsTaxDeferredExpenseOther	62100000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	78600000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	59000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	10900000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	12500000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	14000000.0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	16000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	62000000.0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	22500000	USD
CY2019Q4	dxcm	Deferred Tax Assets Convertible Debt DeferredTaxAssetsConvertibleDebt	1700000	USD
CY2018Q4	dxcm	Deferred Tax Assets Convertible Debt DeferredTaxAssetsConvertibleDebt	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	351700000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	334100000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	332200000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	330100000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	19500000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	4000000.0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	19600000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	3800000	USD
CY2019Q4	dxcm	Deferred Tax Liabilities Convertible Debt Discount DeferredTaxLiabilitiesConvertibleDebtDiscount	0	USD
CY2018Q4	dxcm	Deferred Tax Liabilities Convertible Debt Discount DeferredTaxLiabilitiesConvertibleDebtDiscount	100000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	19600000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	3900000	USD
CY2019Q4	dxcm	Deferred Tax Assets Liabilities Less Valuation Allowance Net DeferredTaxAssetsLiabilitiesLessValuationAllowanceNet	-100000	USD
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CY2019	dxcm	Deferred Tax Assets Tax Benefits Creditedto Additional Paid In Capital DeferredTaxAssetsTaxBenefitsCreditedtoAdditionalPaidInCapital	55700000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	21900000	USD
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CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-17000000.0	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-2300000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-5500000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-700000	USD
CY2019	dxcm	Effective Income Tax Reconciliation Permanent Items EffectiveIncomeTaxReconciliationPermanentItems	1000000.0	USD
CY2018	dxcm	Effective Income Tax Reconciliation Permanent Items EffectiveIncomeTaxReconciliationPermanentItems	1300000	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	10800000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	11700000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	13300000	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	5600000	USD
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	3700000	USD
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CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-14700000	USD
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CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-100000	USD
CY2019	dxcm	Effective Income Tax Reconciliation Unrecognizedtaxbenefits EffectiveIncomeTaxReconciliationUnrecognizedtaxbenefits	0	USD
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CY2019	dxcm	Effective Income Tax Reconciliation Impactof Adoptionof Asu201616 EffectiveIncomeTaxReconciliationImpactofAdoptionofASU201616	0	USD
CY2018	dxcm	Effective Income Tax Reconciliation Impactof Adoptionof Asu201616 EffectiveIncomeTaxReconciliationImpactofAdoptionofASU201616	-13300000	USD
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CY2019	dxcm	Effective Income Tax Reconciliation Impactof Tcja EffectiveIncomeTaxReconciliationImpactofTCJA	0	USD
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CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	3400000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	56900000	USD
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CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	600000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1600000	USD
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CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3300000	USD
CY2017	dxcm	Unrecognized Tax Benefits Decrease Resultingfrom Tax Cuts And Jobs Act Of2017 UnrecognizedTaxBenefitsDecreaseResultingfromTaxCutsAndJobsActOf2017	5400000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	22800000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	4500000	USD
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CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	300000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3400000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	900000	USD
CY2019	dxcm	Employee Purchase Price Floor Percentage EmployeePurchasePriceFloorPercentage	0.85
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CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	800000	shares
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2019	dxcm	Options In Money Number OptionsInMoneyNumber	28385	shares
CY2019	dxcm	Possible Extension Periodof Tax Holiday PossibleExtensionPeriodofTaxHoliday	P3Y
CY2019	dxcm	Employee Stock Purchase Plan Espp Number Of Shares Authorized EmployeeStockPurchasePlanESPPNumberOfSharesAuthorized	1500000	shares
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CY2019	dxcm	In Money Options Maximum Exercise Price InMoneyOptionsMaximumExercisePrice	218.74
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CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	101900000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	106200000	USD
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CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1476000000.0	USD
CY2019	dxcm	Revenue Percentage RevenuePercentage	1
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1031600000	USD
CY2018	dxcm	Revenue Percentage RevenuePercentage	1
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	718500000	USD
CY2017	dxcm	Revenue Percentage RevenuePercentage	1
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1476000000.0	USD
CY2019	dxcm	Revenue Percentage RevenuePercentage	1
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1031600000	USD
CY2018	dxcm	Revenue Percentage RevenuePercentage	1
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	718500000	USD
CY2017	dxcm	Revenue Percentage RevenuePercentage	1
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	462800000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	396300000	USD
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CY2019Q3	us-gaap	Operating Expenses OperatingExpenses	190900000	USD
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CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.01
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.50
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CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.30
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	338000000.0	USD
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CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	242500000	USD
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CY2018Q4	us-gaap	Gross Profit GrossProfit	222800000	USD
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CY2018Q1	us-gaap	Operating Expenses OperatingExpenses	149600000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	-179700000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	46600000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	30200000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-24200000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.03
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CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	12400000	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	5300000	USD
CY2017	dxcm	Sec Schedule1209 Valuation Allowancesand Reserves Deduction Writeoffsand Adjustments SECSchedule1209ValuationAllowancesandReservesDeductionWriteoffsandAdjustments	7000000.0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	700000	USD
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	11400000	USD
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	11400000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	3600000	USD
CY2018	dxcm	Sec Schedule1209 Valuation Allowancesand Reserves Deduction Writeoffsand Adjustments SECSchedule1209ValuationAllowancesandReservesDeductionWriteoffsandAdjustments	8300000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	500000	USD
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	7200000	USD
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	7200000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	900000	USD
CY2019	dxcm	Sec Schedule1209 Valuation Allowancesand Reserves Deduction Writeoffsand Adjustments SECSchedule1209ValuationAllowancesandReservesDeductionWriteoffsandAdjustments	3000000.0	USD
CY2019	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	700000	USD
CY2019Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5800000	USD

Files In Submission

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$DXCM
DEXCOM INC Stock $dxcm

2019 Q4 Form 10-K Financial Statement

#000109355720000029 Filed on February 13, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DXCM DEXCOM INC Stock $dxcm

2019 Q4 Form 10-K Financial Statement

#000109355720000029 Filed on February 13, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DXCM
DEXCOM INC Stock $dxcm