XML 69 R50.htm IDEA: XBRL DOCUMENT v3.19.3

Business Segment and Geographic Information - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) Geographical_Market segment	Sep. 30, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Number of reportable segments | segment			1
Number of primary geographical markets | Geographical_Market			2
Revenues	$ 396.3	$ 266.7	$ 1,013.2	$ 693.6
Revenue, percentage	100.00%	100.00%	100.00%	100.00%
United States
Disaggregation of Revenue [Line Items]
Revenues	$ 308.8	$ 202.4	$ 785.6	$ 537.4
Revenue, percentage	78.00%	76.00%	78.00%	77.00%
Outside of the United States
Disaggregation of Revenue [Line Items]
Revenues	$ 87.5	$ 64.3	$ 227.6	$ 156.2
Revenue, percentage	22.00%	24.00%	22.00%	23.00%
Distributor
Disaggregation of Revenue [Line Items]
Revenues	$ 270.4	$ 154.6	$ 680.0	$ 431.3
Revenue, percentage	68.00%	58.00%	67.00%	62.00%
Direct
Disaggregation of Revenue [Line Items]
Revenues	$ 125.9	$ 112.1	$ 333.2	$ 262.3
Revenue, percentage	32.00%	42.00%	33.00%	38.00%

X

- Definition

Number Of Primary Geographical Markets

+ References

No definition available.

+ Details

Name:	dxcm_NumberOfPrimaryGeographicalMarkets
Namespace Prefix:	dxcm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&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: