XML 54 R34.htm IDEA: XBRL DOCUMENT v3.22.2.2

Fair Value Measurements - Fair Value of Convertible Senior Notes (Details) - Senior Notes - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	$ 2,652.0	$ 4,022.5
Senior Convertible Notes due 2023
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	1,533.4	2,589.6
Senior Convertible Notes due 2025
Fair Value Disclosures [Line Items]
Fair value of outstanding senior convertible notes:	$ 1,118.6	$ 1,432.9

X

- Definition

[Line Items] for Fair Value Disclosures [Table]

+ References

No definition available.

+ Details

Name:	dxcm_FairValueDisclosuresLineItems
Namespace Prefix:	dxcm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

+ References

No definition available.

+ Details

Name:	us-gaap_ConvertibleDebtFairValueDisclosures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=dxcm_ConvertibleNotesDue2023Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=dxcm_ConvertibleNotesDue2025Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: