XML 57 R41.htm IDEA: XBRL DOCUMENT
v3.23.1

Debt - Conversion Value of Convertible Notes (Details) - Senior Notes - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Debt Instrument [Line Items] |  |
Total by which the notes’ if-converted value exceeds their principal amount | $ 1,459.5 | $ 1,395.1
Senior Convertible Notes due 2023 |  |
Debt Instrument [Line Items] |  |
Total by which the notes’ if-converted value exceeds their principal amount | 1,416.9 | 1,361.5
Senior Convertible Notes due 2025 |  |
Debt Instrument [Line Items] |  |
Total by which the notes’ if-converted value exceeds their principal amount | $ 42.6 | $ 33.6

X
- Definition The amount by which the convertible debt's if-converted value exceeds its principle amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031898-161870 + Details
Name: | us-gaap_DebtInstrumentConvertibleIfConvertedValueInExcessOfPrincipal
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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: |