v3.20.2

Convertible Senior Notes - Summary of Net Carrying Amount of Equity Component of 2025 Notes (Details) - 0.125% Convertible Senior Notes due 2025 $ in Thousands	Sep. 30, 2020 USD ($)
Debt Instrument [Line Items]
Debt discount for conversion option	$ 177,169
Issuance costs	(4,099)
Net carrying amount	$ 173,070

X

- Definition

Debt instrument, discount for conversion option.

+ References

No definition available.

+ Details

Name:	ddog_DebtInstrumentDiscountForConversionOption
Namespace Prefix:	ddog_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Debt issuance cost attributable to equity component.

+ References

No definition available.

+ Details

Name:	ddog_DebtIssuanceCostAttributableToEquityComponent
Namespace Prefix:	ddog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

+ Details

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

X

- Details

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