XML 51 R68.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Employee Benefit Plan - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract] |  |  |
Maximum employee contribution to 401k | 50.00% |  |
Employer matching contribution percent for plan participant | 50.00% | 50.00% |
Defined Contribution Plan, Sponsor Location [Extensible List] | country:US | country:US |
Defined Contribution Plan, Tax Status [Extensible List] | us-gaap:QualifiedPlanMember | us-gaap:QualifiedPlanMember |
Maximum contribution by participant that employer will match at 50% | 12.00% | 6.00% |
Maximum annual contribution by employer | $ 5,000 | $ 3,000 |
Employer contribution to the plan | $ 4,100,000 | $ 2,400,000 | $ 2,100,000

X
- Definition Annual maximum contribution to participant 401k plan. + References No definition available. + Details
Name: | mstr_AnnualMaximumContributionToParticipant401kPlan
Namespace Prefix: | mstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Indicates location of employer sponsoring defined contribution plan designed to provide retirement benefits. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanSponsorLocationExtensibleList
Namespace Prefix: | us-gaap_
Data Type: | srt-types:extensibleListItemType
Balance Type: | na
Period Type: | instant

X
- Definition Indicates tax status of defined contribution plan designed to provide retirement benefits. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanTaxStatusExtensibleList
Namespace Prefix: | us-gaap_
Data Type: | srt-types:extensibleListItemType
Balance Type: | na
Period Type: | instant