XML 83 R74.htm IDEA: XBRL DOCUMENT v3.22.1

Stockholders’ Deficit - Assumed Stock Options Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended
	Mar. 22, 2021	Mar. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield		0.00%
DocSend Inc.
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options assumed (in shares)	0.4
Weighted average grant date fair value of stock options assumed (in dollars per share)		$ 25.28
Fair value of options assumed in business combination		$ 9.3
Post combination, stock-based compensation expense		$ 8.1

X

- Definition

Allocated Share-based Compensation Expense, Post Combination

+ References

No definition available.

+ Details

Name:	dbx_AllocatedSharebasedCompensationExpensePostCombination
Namespace Prefix:	dbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Assumed Through Business Acquisition

+ References

No definition available.

+ Details

Name:	dbx_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAssumedThroughBusinessAcquisition
Namespace Prefix:	dbx_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Assumed Through Business Acquisition, Fair Value

+ References

No definition available.

+ Details

Name:	dbx_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAssumedThroughBusinessAcquisitionFairValue
Namespace Prefix:	dbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Assumed in Period, Weighted Average Grant Date Fair Value

+ References

No definition available.

+ Details

Name:	dbx_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsAssumedinPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	dbx_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types: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_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=dbx_DocSendIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: