XML 48 R37.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Commitments and Contingencies Litigation (Details) | Mar. 30, 2018 number_patents | Feb. 28, 2018 number_patents | Sep. 15, 2017 number_patents | Mar. 08, 2017 number_patents | Feb. 24, 2017 number_patents | Aug. 25, 2016 number_patents | Jun. 06, 2016 number_patents | Sep. 30, 2018 USD ($)
--- | --- | --- | --- | --- | --- | --- | --- | ---
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency accrual | $ |  |  |  |  |  |  |  | $ 0
Estimated litigation liability | $ |  |  |  |  |  |  |  | $ 0
AgaMatrix |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency, patents allegedly infringed, number |  |  |  |  |  |  | 3 |
WaveForm Technologies, Inc. |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Loss contingency, patents allegedly infringed, number transferred to new plaintiff |  |  |  |  | 3 |  |  |
Loss contingencies, patents allegedly infringed, number of inter partes review requested | 2 | 2 |  | 3 |  | 2 |  |
AgaMatrix |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |
Gain contingency, patents allegedly infringed upon, number |  |  | 2 |  |  |  |  |

X
- Definition Loss Contingencies, Patents Allegedly Infringed, Number of inter partes reviews requested + References No definition available. + Details
Name: | dxcm_LossContingenciesPatentsAllegedlyInfringedNumberofinterpartesreviewrequested
Namespace Prefix: | dxcm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loss Contingency, Patents Allegedly Infringed, Number Transferred to New Plaintiff + References No definition available. + Details
Name: | dxcm_LossContingencyPatentsAllegedlyInfringedNumberTransferredtoNewPlaintiff
Namespace Prefix: | dxcm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of entity's patents that another entity has allegedly infringed. + References No definition available. + Details
Name: | us-gaap_GainContingencyPatentsAllegedlyInfringedUponNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LitigationReserve
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of another entity's patents that the entity has allegedly infringed. + References No definition available. + Details
Name: | us-gaap_LossContingencyPatentsAllegedlyInfringedNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dxcm_NameofPlaintiffAxis=dxcm_AgaMatrixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dxcm_NameofPlaintiffAxis=dxcm_WaveFormTechnologiesInc.Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dxcm_NameofDefendantAxis=dxcm_AgaMatrixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |