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Segment Information - Additional Information (Detail) | 3 Months Ended
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Mar. 31, 2015 Segment | Mar. 31, 2014 Country | Dec. 31, 2014 Country
Segment Reporting Information |  |  |
Number of operating segments | 1 us-gaap_NumberOfOperatingSegments |  |
Geographic Concentration Risk | Sales Revenue, Goods, Net |  |  |
Segment Reporting Information |  |  |
Number Of Individual Country accounted for 10% or more of total revenues | 0 mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedRevenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember | 0 mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedRevenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |
Geographic Concentration Risk | Assets, Total |  |  |
Segment Reporting Information |  |  |
Number Of Individual country accounted for 10% or more of total consolidated assets | 0 mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedAssets / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AssetsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember |  | 0 mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedAssets / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AssetsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember
Customer Concentration Risk | Sales Revenue, Goods, Net |  |  |
Segment Reporting Information |  |  |
Number Of Individual Customer accounted for 10% or more of total consolidated revenues | 0 mstr_NumberOfIndividualCustomerContributingAsMajorCustomer / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember | 0 mstr_NumberOfIndividualCustomerContributingAsMajorCustomer / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember |

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- Definition Number of individual foreign countries that accounted for 10% or more of total consolidated assets, excluding assets held-for-sale. + References No definition available. + Details
Name: | mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedAssets
Namespace Prefix: | mstr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of individual foreign countries that accounted for 10% or more of total consolidated revenues from continuing operations. + References No definition available. + Details
Name: | mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedRevenues
Namespace Prefix: | mstr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of individual customers that accounted for 10% or more of total consolidated revenues from continuing operations. + References No definition available. + Details
Name: | mstr_NumberOfIndividualCustomerContributingAsMajorCustomer
Namespace Prefix: | mstr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
Name: | us-gaap_NumberOfOperatingSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_GeographicConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |