$DXCM
DEXCOM INC Stock $dxcm

$dxcm Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-K Financial Statement

#000109355722000014 Filed on February 14, 2022

Income Statement

Concept	2021 Q4	2021	2020 Q4
Revenue	$698.2M	$2.449B	$568.9M
YoY Change	22.73%	27.08%	22.93%
Cost Of Revenue	$197.5M	$768.0M	$158.6M
YoY Change	24.53%	18.78%	6.09%
Gross Profit	$500.7M	$1.681B	$410.3M
YoY Change	22.03%	31.28%	32.65%
Gross Profit Margin	71.71%	68.63%	72.12%
Selling, General & Admin	$235.1M	$810.5M	$175.9M
YoY Change	33.66%	30.58%	36.36%
% of Gross Profit	46.95%	48.23%	42.87%
Research & Development	$236.9M	$517.1M	$119.2M
YoY Change	98.74%	43.68%	51.27%
% of Gross Profit	47.31%	30.77%	29.05%
Depreciation & Amortization	$32.10M	$102.0M	$20.40M
YoY Change	57.35%	52.01%	42.66%
% of Gross Profit	6.41%	6.07%	4.97%
Operating Expenses	$472.0M	$1.415B	$295.1M
YoY Change	59.95%	44.27%	42.01%
Operating Profit	$28.70M	$265.8M	$115.2M
YoY Change	-75.09%	-11.25%	13.5%
Interest Expense	-$14.60M	$100.3M	-$22.70M
YoY Change	-35.68%	18.42%	215.28%
% of Operating Profit	-50.87%	37.74%	-19.7%
Other Income/Expense, Net		-$1.700M
YoY Change		-110.56%
Pretax Income	-$14.70M	$173.9M	$81.30M
YoY Change	-118.08%	-22.71%	-13.79%
Income Tax	$4.700M	$19.20M	-$273.9M
% Of Pretax Income		11.04%	-336.9%
Net Earnings	-$19.40M	$154.7M	$355.2M
YoY Change	-105.46%	-68.66%	283.17%
Net Earnings / Revenue	-2.78%	6.32%	62.44%
Basic Earnings Per Share		$1.60
Diluted Earnings Per Share	-$50.00K	$1.55	$3.577M
COMMON SHARES
Basic Shares Outstanding	96.92M shares	96.70M shares	96.03M shares
Diluted Shares Outstanding		100.1M shares

Balance Sheet

Concept	2021 Q4	2021	2020 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.411B	$2.731B	$2.708B
YoY Change	-10.98%	0.87%	76.59%
Cash & Equivalents	$1.053B	$1.053B	$817.6M
Short-Term Investments	$1.358B	$1.679B	$1.890B
Other Short-Term Assets	$27.40M	$81.60M	$53.90M
YoY Change	-49.17%	51.39%	79.67%
Inventory	$357.3M	$357.3M	$234.7M
Prepaid Expenses	$51.90M
Receivables	$514.3M	$514.3M	$428.5M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$3.684B	$3.684B	$3.425B
YoY Change	7.58%	7.58%	73.9%
LONG-TERM ASSETS
Property, Plant & Equipment	$801.8M	$889.9M	$515.3M
YoY Change	55.6%	46.22%	60.38%
Goodwill	$26.50M		$19.30M
YoY Change	37.31%		3.76%
Intangibles	$31.50M
YoY Change
Long-Term Investments
YoY Change
Other Assets	$10.50M	$301.0M	$21.40M
YoY Change	-50.93%	26.58%	50.7%
Total Long-Term Assets	$1.249B	$1.249B	$865.7M
YoY Change	44.26%	44.26%	103.41%
TOTAL ASSETS
Total Short-Term Assets	$3.684B	$3.684B	$3.425B
Total Long-Term Assets	$1.249B	$1.249B	$865.7M
Total Assets	$4.933B	$4.933B	$4.291B
YoY Change	14.98%	14.98%	79.14%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$189.4M	$189.4M	$163.3M
YoY Change	15.98%	15.98%	59.63%
Accrued Expenses	$514.3M	$514.3M	$448.6M
YoY Change	14.65%	14.65%	75.51%
Deferred Revenue	$2.100M		$2.200M
YoY Change	-4.55%		29.41%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$720.8M	$720.8M	$614.1M
YoY Change	17.38%	17.38%	70.49%
LONG-TERM LIABILITIES
Long-Term Debt	$2.039B	$2.039B	$1.721B
YoY Change	18.45%	18.45%	60.25%
Other Long-Term Liabilities	$90.00M	$125.7M	$80.90M
YoY Change	11.25%	-2.33%	302.49%
Total Long-Term Liabilities	$90.00M	$2.165B	$80.90M
YoY Change	11.25%	17.01%	302.49%
TOTAL LIABILITIES
Total Short-Term Liabilities	$720.8M	$720.8M	$614.1M
Total Long-Term Liabilities	$90.00M	$2.165B	$80.90M
Total Liabilities	$2.891B	$2.891B	$2.464B
YoY Change	17.34%	17.34%	62.92%
SHAREHOLDERS EQUITY
Retained Earnings	$138.7M		-$78.20M
YoY Change	-277.37%		-88.76%
Common Stock	$2.109B		$1.727B
YoY Change	22.14%		3.02%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$206.2M		$100.0M
YoY Change	106.2%		0.0%
Treasury Stock Shares	3.400M shares		800.0K shares
Shareholders Equity	$2.042B	$2.042B	$1.552B
YoY Change
Total Liabilities & Shareholders Equity	$4.933B	$4.933B	$4.291B
YoY Change	14.98%	14.98%	79.14%

Cashflow Statement

Concept	2021 Q4	2021	2020 Q4
OPERATING ACTIVITIES
Net Income	-$19.40M	$154.7M	$355.2M
YoY Change	-105.46%	-68.66%	283.17%
Depreciation, Depletion And Amortization	$32.10M	$102.0M	$20.40M
YoY Change	57.35%	52.01%	42.66%
Cash From Operating Activities	$105.8M	$442.5M	$172.0M
YoY Change	-38.49%	-6.96%	19.69%
INVESTING ACTIVITIES
Capital Expenditures	-$80.20M	$389.2M	-$60.20M
YoY Change	33.22%	95.58%	36.51%
Acquisitions		$30.20M
YoY Change
Other Investing Activities	-$415.9M	-$10.10M	$36.20M
YoY Change	-1248.9%	-189.38%	-172.11%
Cash From Investing Activities	-$496.1M	-$216.1M	-$24.00M
YoY Change	1967.08%	-78.77%	-74.55%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$20.30M
YoY Change		-232.68%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-800.0K	$10.40M	-4.900M
YoY Change	-83.67%	-98.86%	4800.0%
NET CHANGE
Cash From Operating Activities	105.8M	$442.5M	172.0M
Cash From Investing Activities	-496.1M	-$216.1M	-24.00M
Cash From Financing Activities	-800.0K	$10.40M	-4.900M
Net Change In Cash	-391.1M	$235.4M	143.1M
YoY Change	-373.31%	-36.69%	190.26%
FREE CASH FLOW
Cash From Operating Activities	$105.8M	$442.5M	$172.0M
Capital Expenditures	-$80.20M	$389.2M	-$60.20M
Free Cash Flow	$186.0M	$53.30M	$232.2M
YoY Change	-19.9%	-80.73%	23.64%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	dei	Amendment Flag AmendmentFlag	false
CY2021	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
CY2021	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2021	dei	Entity Central Index Key EntityCentralIndexKey	0001093557
CY2018	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountingStandardsUpdate201602Member
CY2021Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountsPayableAndOtherAccruedLiabilitiesCurrent
CY2020Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#AccountsPayableAndOtherAccruedLiabilitiesCurrent
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesNoncurrent
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2021-01-31#OtherLiabilitiesNoncurrent
CY2021	dei	Document Type DocumentType	10-K
CY2021	dei	Document Annual Report DocumentAnnualReport	true
CY2021	dei	Document Period End Date DocumentPeriodEndDate	2021-12-31
CY2021	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2021	dei	Document Transition Report DocumentTransitionReport	false
CY2021	dei	Entity File Number EntityFileNumber	000-51222
CY2021	dei	Entity Registrant Name EntityRegistrantName	DEXCOM, INC.
CY2021	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2021	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	33-0857544
CY2021	dei	Entity Address Address Line1 EntityAddressAddressLine1	6340 Sequence Drive
CY2021	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
CY2021	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2021	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92121
CY2021	dei	City Area Code CityAreaCode	858
CY2021	dei	Local Phone Number LocalPhoneNumber	200-0200
CY2021	dei	Security12b Title Security12bTitle	Common Stock, $0.001 Par Value Per Share
CY2021	dei	Trading Symbol TradingSymbol	DXCM
CY2021	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2021	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2021	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2021	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2021	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2021	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2021	dei	Entity Small Business EntitySmallBusiness	false
CY2021	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2021	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2021	dei	Entity Shell Company EntityShellCompany	false
CY2021Q2	dei	Entity Public Float EntityPublicFloat	41100000000	USD
CY2022Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	97065634	shares
CY2021	dei	Auditor Firm AuditorFirmId	42
CY2021	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2021	dei	Auditor Location AuditorLocation	San Diego, California
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CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	817600000	USD
CY2021Q4	dxcm	Debt Securities Available For Sale And Equity Securities DebtSecuritiesAvailableForSaleAndEquitySecurities	1678600000	USD
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CY2021Q4	us-gaap	Goodwill Goodwill	26500000	USD
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CY2021Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	2100000	USD
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CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	614100000	USD
CY2021Q4	us-gaap	Convertible Long Term Notes Payable ConvertibleLongTermNotesPayable	1702700000	USD
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CY2020Q4	us-gaap	Liabilities Liabilities	2464000000	USD
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92300000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154700000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	493600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-1000000.0	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1100000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	400000	USD
CY2021	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1700000	USD
CY2020	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 Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	400000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2700000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	900000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	800000	USD
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	152000000.0	USD
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	494500000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	101900000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	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	dxcm	Adjustments To Additional Paid In Capital Tax Benefit From Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalTaxBenefitFromEquityComponentOfConvertibleDebt	-700000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	102700000	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 StockholdersEquity	882600000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	300000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	15000000.0	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	289400000	USD
CY2020	dxcm	Adjustments To Additional Paid In Capital Tax Benefit From Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalTaxBenefitFromEquityComponentOfConvertibleDebt	62500000	USD
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities Net Of Adjustments StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments	87800000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	119400000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	493600000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	900000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	1826500000	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Benefit Plan StockIssuedDuringPeriodValueEmployeeBenefitPlan	0	USD
CY2021	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	20300000	USD
CY2021	dxcm	Adjustments To Additional Paid In Capital Tax Benefit From Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalTaxBenefitFromEquityComponentOfConvertibleDebt	1100000	USD
CY2021	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities Net Of Adjustments StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments	53300000	USD
CY2021	dxcm	Shares Received From Benefit Of Note Hedge Value SharesReceivedFromBenefitOfNoteHedgeValue	0	USD
CY2021	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	113400000	USD
CY2021	dxcm	Adjustments To Additional Paid In Capital Collaborative Research And Development Fee AdjustmentsToAdditionalPaidInCapitalCollaborativeResearchAndDevelopmentFee	87100000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154700000	USD
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-2700000	USD
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	2251500000	USD
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154700000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	493600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	102000000.0	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	67100000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	48700000	USD
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	113400000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	119400000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	102700000	USD
CY2021	dxcm	Collaborative Research And Development Fee CollaborativeResearchAndDevelopmentFee	87100000	USD
CY2020	dxcm	Collaborative Research And Development Fee CollaborativeResearchAndDevelopmentFee	0	USD
CY2019	dxcm	Collaborative Research And Development Fee CollaborativeResearchAndDevelopmentFee	0	USD
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1500000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-5900000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2021	us-gaap	Paid In Kind Interest PaidInKindInterest	88700000	USD
CY2020	us-gaap	Paid In Kind Interest PaidInKindInterest	74000000.0	USD
CY2019	us-gaap	Paid In Kind Interest PaidInKindInterest	49600000	USD
CY2021	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	11600000	USD
CY2020	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	-4200000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4900000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-277300000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	200000	USD
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-43600000	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-13700000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-1900000	USD
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	75500000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	142300000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	60000000.0	USD
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	112200000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	114500000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	49100000	USD
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	21300000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2400000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	7200000	USD
CY2021	dxcm	Increase Decreasein Operating Lease Assetsand Liabilities Net IncreaseDecreaseinOperatingLeaseAssetsandLiabilitiesNet	100000	USD
CY2020	dxcm	Increase Decreasein Operating Lease Assetsand Liabilities Net IncreaseDecreaseinOperatingLeaseAssetsandLiabilitiesNet	800000	USD
CY2019	dxcm	Increase Decreasein Operating Lease Assetsand Liabilities Net IncreaseDecreaseinOperatingLeaseAssetsandLiabilitiesNet	2400000	USD
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	58000000.0	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	194500000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	109000000.0	USD
CY2021	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	10400000	USD
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	26100000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	16000000.0	USD
CY2021	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	8700000	USD
CY2020	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	18600000	USD
CY2019	us-gaap	Increase Decrease In Other Deferred Liability IncreaseDecreaseInOtherDeferredLiability	-200000	USD
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	442500000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	475600000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	314500000	USD
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2473100000	USD
CY2020	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	3058200000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	2030400000	USD
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	2666300000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	2250500000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	1196400000	USD
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	389200000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	199000000.0	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	180000000.0	USD
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	30200000	USD
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-10100000	USD
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	11300000	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1200000	USD
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-216100000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1018000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-1015200000	USD
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	20300000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	15300000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	11900000	USD
CY2021	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	1188800000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2021	dxcm	Payments For Repurchase Of Convertible Notes PaymentsForRepurchaseOfConvertibleNotes	0	USD
CY2020	dxcm	Payments For Repurchase Of Convertible Notes PaymentsForRepurchaseOfConvertibleNotes	282600000	USD
CY2019	dxcm	Payments For Repurchase Of Convertible Notes PaymentsForRepurchaseOfConvertibleNotes	0	USD
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9900000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-9400000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1200000	USD
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	10400000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	912100000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	10700000	USD
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-1400000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2100000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-700000	USD
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	235400000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	371800000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-690700000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	818200000	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
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1053600000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	818200000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	446400000	USD
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1052600000	USD
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	817600000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	446200000	USD
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	1000000.0	USD
CY2020Q4	us-gaap	Restricted Cash RestrictedCash	600000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	200000	USD
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1053600000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	818200000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	446400000	USD
CY2021	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	157700000	USD
CY2020	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	1350900000	USD
CY2019	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	0	USD
CY2021	dxcm	Treasury Stock Value Benefit Received From Note Hedge TreasuryStockValueBenefitReceivedFromNoteHedge	130800000	USD
CY2020	dxcm	Treasury Stock Value Benefit Received From Note Hedge TreasuryStockValueBenefitReceivedFromNoteHedge	0	USD
CY2019	dxcm	Treasury Stock Value Benefit Received From Note Hedge TreasuryStockValueBenefitReceivedFromNoteHedge	0	USD
CY2021	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	45400000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	35300000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	14200000	USD
CY2021	us-gaap	Interest Paid Net InterestPaidNet	11600000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	10600000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	10400000	USD
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	16800000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	3600000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	4800000	USD
CY2021	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:6pt;margin-top:6pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.415%"><tr><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/></tr><tr><td colspan="15" style="border-bottom:1pt dotted #58a618;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#58a618;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:700;line-height:100%">Use of Estimates</span></td></tr></table></div><div style="margin-bottom:6pt;margin-top:1pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 consolidated financial statements and the disclosures made in the accompanying notes. Areas requiring significant estimates include rebates, transaction price, the collectibility of accounts receivable, excess or obsolete inventories and the valuation of inventory, accruals for litigation contingencies, and the amount of our worldwide tax provision and the realizability of deferred tax assets. Despite our intention to establish accurate estimates and use reasonable assumptions, actual results may differ from our estimates.</span></div>
CY2021	dxcm	Maturity Threshold Of Investments Classified To Cash Equivalents MaturityThresholdOfInvestmentsClassifiedToCashEquivalents	P90D
CY2021	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:6pt;margin-top:6pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.415%"><tr><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/><td style="width:1.0%"/><td style="width:18.900%"/><td style="width:0.1%"/></tr><tr><td colspan="15" style="border-bottom:1pt dotted #58a618;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#58a618;font-family:'Times New Roman',sans-serif;font-size:12pt;font-style:italic;font-weight:700;line-height:100%">Concentration of Credit Risk and Significant Customers</span></td></tr></table></div><div style="margin-bottom:6pt;margin-top:1pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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 a few major 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 Impairment Loss GoodwillImpairmentLoss	0	USD
CY2020	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2021	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2020	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2021	dxcm	Revenue Recognition Sales Returns Coverage Period RevenueRecognitionSalesReturnsCoveragePeriod	P30D
CY2021Q4	us-gaap	Unbilled Contracts Receivable UnbilledContractsReceivable	9600000	USD
CY2021Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	16100000	USD
CY2020Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	8200000	USD
CY2021	us-gaap	Advertising Expense AdvertisingExpense	126400000	USD
CY2020	us-gaap	Advertising Expense AdvertisingExpense	76500000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	33100000	USD
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	100100000	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	154700000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	493600000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	101100000	USD
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.60
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.23
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.11
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.55
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.06
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.10
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	96700000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	94400000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	91100000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	97500000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92300000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6800000	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7200000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	14600000	shares
CY2021Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	831400000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1678600000	USD
CY2021Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	7000000.0	USD
CY2021Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	2517000000	USD
CY2020Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	641500000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	1360000000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1890100000	USD
CY2020Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	3400000	USD
CY2020Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	2535000000	USD
CY2021	dxcm	Fair Value Assets Level3 Transfers Amount FairValueAssetsLevel3TransfersAmount	0	USD
CY2020	dxcm	Fair Value Assets Level3 Transfers Amount FairValueAssetsLevel3TransfersAmount	0	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1680600000	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	USD
CY2021Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	2000000.0	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1678600000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1890000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	200000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1890100000	USD
CY2021Q4	us-gaap	Available For Sale Securities Debt Securities Noncurrent AvailableForSaleSecuritiesDebtSecuritiesNoncurrent	320700000	USD
CY2021	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	11600000	USD
CY2021Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	519700000	USD
CY2020Q4	us-gaap	Accounts Receivable Gross AccountsReceivableGross	435700000	USD
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	5400000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	7200000	USD
CY2021Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	514300000	USD
CY2020Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	428500000	USD
CY2021Q4	dxcm	Accounts Receivable Allowance For Credit Loss Cash Discount AccountsReceivableAllowanceForCreditLossCashDiscount	13700000	USD
CY2020Q4	dxcm	Accounts Receivable Allowance For Credit Loss Cash Discount AccountsReceivableAllowanceForCreditLossCashDiscount	15900000	USD
CY2019Q4	dxcm	Accounts Receivable Allowance For Credit Loss Cash Discount AccountsReceivableAllowanceForCreditLossCashDiscount	4600000	USD
CY2021Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	145200000	USD
CY2020Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	69900000	USD
CY2021Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	16200000	USD
CY2020Q4	us-gaap	Inventory Work In Process Net Of Reserves InventoryWorkInProcessNetOfReserves	14200000	USD
CY2021Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	195900000	USD
CY2020Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	150600000	USD
CY2021Q4	us-gaap	Inventory Net InventoryNet	357300000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	234700000	USD
CY2021Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	145200000	USD
CY2021Q4	dxcm	Inventory Raw Materials Net Of Reserves Pre Launch InventoryRawMaterialsNetOfReservesPreLaunch	5500000	USD
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	81600000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	53900000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1033300000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	669500000	USD
CY2021Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	231500000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	154200000	USD
CY2021Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	801800000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	515300000	USD
CY2021	us-gaap	Depreciation Depreciation	96300000	USD
CY2020	us-gaap	Depreciation Depreciation	64000000.0	USD
CY2019	us-gaap	Depreciation Depreciation	46900000	USD
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-24500000	USD
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-13600000	USD
CY2019	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-10500000	USD
CY2021Q3	us-gaap	Finitelived Intangible Assets Acquired1 FinitelivedIntangibleAssetsAcquired1	22600000	USD
CY2021Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	196000000.0	USD
CY2020Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	163300000	USD
CY2021Q4	dxcm	Accrued Tax Audit And Legal Fees AccruedTaxAuditAndLegalFees	40700000	USD
CY2020Q4	dxcm	Accrued Tax Audit And Legal Fees AccruedTaxAuditAndLegalFees	15300000	USD
CY2021Q4	dxcm	Pharmacy Rebates PharmacyRebates	260500000	USD
CY2020Q4	dxcm	Pharmacy Rebates PharmacyRebates	247000000.0	USD
CY2021Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	12900000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11700000	USD
CY2021Q4	dxcm	Contractual Obligations Current ContractualObligationsCurrent	15000000.0	USD
CY2020Q4	dxcm	Contractual Obligations Current ContractualObligationsCurrent	0	USD
CY2021Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	47900000	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	43800000	USD
CY2021Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	573000000.0	USD
CY2020Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	481100000	USD
CY2021Q4	dxcm	Accrued Wages Bonuses And Taxes Current AccruedWagesBonusesAndTaxesCurrent	91800000	USD
CY2020Q4	dxcm	Accrued Wages Bonuses And Taxes Current AccruedWagesBonusesAndTaxesCurrent	87700000	USD
CY2021Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	33400000	USD
CY2020Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	26600000	USD
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	125200000	USD
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	114300000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11700000	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	7400000	USD
CY2018Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	6800000	USD
CY2021	dxcm	Standard Product Warranty Accrual Charges To Costs And Expenses StandardProductWarrantyAccrualChargesToCostsAndExpenses	41500000	USD
CY2020	dxcm	Standard Product Warranty Accrual Charges To Costs And Expenses StandardProductWarrantyAccrualChargesToCostsAndExpenses	41300000	USD
CY2019	dxcm	Standard Product Warranty Accrual Charges To Costs And Expenses StandardProductWarrantyAccrualChargesToCostsAndExpenses	32700000	USD
CY2021	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	40300000	USD
CY2020	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	37000000.0	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	32100000	USD
CY2021Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	12900000	USD
CY2020Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	11700000	USD
CY2019Q4	us-gaap	Standard Product Warranty Accrual StandardProductWarrantyAccrual	7400000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	57000000.0	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	54000000.0	USD
CY2021Q4	us-gaap	Contractual Obligation ContractualObligation	0	USD
CY2020Q4	us-gaap	Contractual Obligation ContractualObligation	12600000	USD
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	5900000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	0	USD
CY2021Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	27100000	USD
CY2020Q4	us-gaap	Other Sundry Liabilities Noncurrent OtherSundryLiabilitiesNoncurrent	14300000	USD
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	90000000.0	USD
CY2020Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	80900000	USD
CY2021	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	9300000	USD
CY2020	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	9300000	USD
CY2019	us-gaap	Interest Expense Debt Excluding Amortization InterestExpenseDebtExcludingAmortization	9300000	USD
CY2021	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	83000000.0	USD
CY2020	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	68600000	USD
CY2019	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	45800000	USD
CY2021	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4400000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	4000000.0	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	3700000	USD
CY2021	us-gaap	Interest Expense Debt InterestExpenseDebt	96700000	USD
CY2020	us-gaap	Interest Expense Debt InterestExpenseDebt	81900000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	58800000	USD
CY2020Q2	dxcm	Payments For Repurchase Of Convertible Notes PaymentsForRepurchaseOfConvertibleNotes	282600000	USD
CY2020Q2	us-gaap	Stock Issued During Period Shares Conversion Of Convertible Securities StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities	1953067	shares
CY2021Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	192700000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	25700000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	6300000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	25200000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	6400000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	23500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	5400000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	22500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	4800000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	22300000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	4900000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	17200000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	64000000.0	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	136400000	USD
CY2021Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	91800000	USD
CY2021Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	17300000	USD
CY2021Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	31500000	USD
CY2021Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	119100000	USD
CY2021Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	60300000	USD
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	20500000	USD
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	3300000	USD
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	98600000	USD
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	57000000.0	USD
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	7400000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	4500000	USD
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	4100000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	2000000.0	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1100000	USD
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	3000000.0	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1900000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	800000	USD
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	23300000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	18400000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	12200000	USD
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2300000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1300000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3500000	USD
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	6000000.0	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	4200000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	3900000	USD
CY2021	us-gaap	Lease Cost LeaseCost	38700000	USD
CY2020	us-gaap	Lease Cost LeaseCost	27800000	USD
CY2019	us-gaap	Lease Cost LeaseCost	21500000	USD
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	23300000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	18300000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	14300000	USD
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	1900000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	700000	USD
CY2019	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	800000	USD
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	9900000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	8500000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	500000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13100000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	33500000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	80600000	USD
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	6400000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	41700000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	15500000	USD
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y6M
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y1M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y2M12D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P15Y10M24D
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P23Y3M18D
CY2019Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P13Y3M18D
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.050
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.051
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.050
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.050
CY2021	dxcm	Lessee Operating Leases Lease Cost Amortization LesseeOperatingLeasesLeaseCostAmortization	18000000.0	USD
CY2020	dxcm	Lessee Operating Leases Lease Cost Amortization LesseeOperatingLeasesLeaseCostAmortization	12400000	USD
CY2019	dxcm	Lessee Operating Leases Lease Cost Amortization LesseeOperatingLeasesLeaseCostAmortization	9100000	USD
CY2021Q4	us-gaap	Recorded Unconditional Purchase Obligation Due Within One Year RecordedUnconditionalPurchaseObligationDueWithinOneYear	324100000	USD
CY2020Q4	us-gaap	Recorded Unconditional Purchase Obligation Due Within One Year RecordedUnconditionalPurchaseObligationDueWithinOneYear	335600000	USD
CY2021	dxcm	Recorded Unconditional Purchase Obligation Due Within One Year Maximum Term RecordedUnconditionalPurchaseObligationDueWithinOneYearMaximumTerm	P1Y
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	235300000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	270700000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	119100000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-61400000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-45700000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-14900000	USD
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	173900000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	225000000.0	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	104200000	USD
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	5700000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	8300000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6100000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1000000.0	USD
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	10100000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2600000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1900000	USD
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	24100000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	8700000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2900000	USD
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5500000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-198800000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3400000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-51400000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-7000000.0	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-27100000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	200000	USD
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4900000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-277300000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	200000	USD
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19200000	USD
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CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	105500000	USD
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CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	500000	USD
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CY2020Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	36300000	USD
CY2021Q4	dxcm	Deferred Tax Liabilities Convertible Debt Discount DeferredTaxLiabilitiesConvertibleDebtDiscount	48100000	USD
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CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	92200000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	214900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	216400000	USD
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CY2021Q4	dxcm	Deferred Tax Asset Increase Decrease Amount DeferredTaxAssetIncreaseDecreaseAmount	1500000	USD
CY2021	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	7300000	USD
CY2021Q4	us-gaap	Deferred Tax Assets Unrealized Losses On Availablefor Sale Securities Gross DeferredTaxAssetsUnrealizedLossesOnAvailableforSaleSecuritiesGross	500000	USD
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CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	21900000	USD
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CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	3200000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-2300000	USD
CY2021	dxcm	Effective Income Tax Reconciliation Permanent Items EffectiveIncomeTaxReconciliationPermanentItems	26200000	USD
CY2020	dxcm	Effective Income Tax Reconciliation Permanent Items EffectiveIncomeTaxReconciliationPermanentItems	13100000	USD
CY2019	dxcm	Effective Income Tax Reconciliation Permanent Items EffectiveIncomeTaxReconciliationPermanentItems	1000000.0	USD
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	28900000	USD
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CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	10800000	USD
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CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	29500000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	900000	USD
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CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	36600000	USD
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CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	0	USD
CY2021	dxcm	Possible Extension Periodof Tax Holiday PossibleExtensionPeriodofTaxHoliday	P3Y
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	113400000	USD
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CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2021	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	43198	shares
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CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	7900000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	7400000	USD
CY2019	dxcm	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Vested ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested	0	shares
CY2020	dxcm	Share Based Compensation Arrangement By Share Based Payment Award Non Option Equity Instruments Vested ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVested	0	shares
CY2019Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5800000	USD
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CY2021	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2448500000	USD
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CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1926700000	USD
CY2020	dxcm	Revenue Percentage RevenuePercentage	1
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1476000000	USD
CY2019	dxcm	Revenue Percentage RevenuePercentage	1
CY2020	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	3200000	USD
CY2019	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	700000	USD
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CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2448500000	USD
CY2021	dxcm	Revenue Percentage RevenuePercentage	1
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1926700000	USD
CY2020	dxcm	Revenue Percentage RevenuePercentage	1
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1476000000	USD
CY2019	dxcm	Revenue Percentage RevenuePercentage	1
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	7200000	USD
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CY2019	dxcm	Sec Schedule1209 Valuation Allowancesand Reserves Deduction Writeoffsand Adjustments SECSchedule1209ValuationAllowancesandReservesDeductionWriteoffsandAdjustments	3000000.0	USD
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	7200000	USD
CY2020	dxcm	Sec Schedule1209 Valuation Allowancesand Reserves Deduction Writeoffsand Adjustments SECSchedule1209ValuationAllowancesandReservesDeductionWriteoffsandAdjustments	2100000	USD
CY2020	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	300000	USD
CY2020Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	7200000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	-1400000	USD
CY2021	dxcm	Sec Schedule1209 Valuation Allowancesand Reserves Deduction Writeoffsand Adjustments SECSchedule1209ValuationAllowancesandReservesDeductionWriteoffsandAdjustments	500000	USD
CY2021	us-gaap	Valuation Allowances And Reserves Recoveries ValuationAllowancesAndReservesRecoveries	100000	USD
CY2021Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	5400000	USD

Files In Submission

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$DXCM
DEXCOM INC Stock $dxcm

2021 Q4 Form 10-K Financial Statement

#000109355722000014 Filed on February 14, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DXCM DEXCOM INC Stock $dxcm

2021 Q4 Form 10-K Financial Statement

#000109355722000014 Filed on February 14, 2022

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$DXCM
DEXCOM INC Stock $dxcm