XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.19.1

Business Segment and Geographic Information - Additional Information (Detail) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($) segment | Mar. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items] |  |
Number of Reportable Segments | segment | 1 |
Revenues | $ 280.5 | $ 184.4
Revenue, Percentage | 100.00% | 100.00%
United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 210.5 | $ 145.4
Revenue, Percentage | 75.00% | 79.00%
Outside of the United States |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 70.0 | $ 39.0
Revenue, Percentage | 25.00% | 21.00%
Distributor |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 187.8 | $ 118.3
Revenue, Percentage | 67.00% | 64.00%
Direct |  |
Disaggregation of Revenue [Line Items] |  |
Revenues | $ 92.7 | $ 66.1
Revenue, Percentage | 33.00% | 36.00%

X
- Definition Revenue, Percentage + References No definition available. + Details
Name: | dxcm_RevenuePercentage
Namespace Prefix: | dxcm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=us-gaap_NonUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=us-gaap_SalesChannelThroughIntermediaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ContractWithCustomerSalesChannelAxis=us-gaap_SalesChannelDirectlyToConsumerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |