XML 15 R26.htm IDEA: XBRL DOCUMENT v3.19.3

Organization and Significant Accounting Policies - Concentration Risk and Significant Customers (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Distributor A
Concentration Risk [Line Items]
Percentage of revenue	17.00%	15.00%	16.00%	15.00%
Percentage of accounts receivable	20.00%		20.00%		19.00%
Distributor B
Concentration Risk [Line Items]
Percentage of revenue	11.00%		12.00%	13.00%
Percentage of accounts receivable	11.00%		11.00%		15.00%
Distributor C
Concentration Risk [Line Items]
Percentage of revenue	12.00%		10.00%
Percentage of accounts receivable	13.00%		13.00%

X

- Definition

Concentration Risk, Percentage Of Accounts Receivable Attributable To Customer

+ References

No definition available.

+ Details

Name:	dxcm_ConcentrationRiskPercentageOfAccountsReceivableAttributableToCustomer
Namespace Prefix:	dxcm_
Data Type:	num:percentItemType
Balance Type:	na
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_ConcentrationRiskLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_MajorCustomersAxis=dxcm_CustomerAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dxcm_CustomerBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=dxcm_CustomerCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: