v2.4.1.9

Segment Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014 Country	Dec. 31, 2013 Country	Dec. 31, 2012 Country
Segment Reporting Information
Number of operating segments	1us-gaap_NumberOfOperatingSegments
Geographic Concentration Risk | Sales Revenue, Goods, Net
Segment Reporting Information
Number Of Individual Country accounted for 10% or more of total revenues	0mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedRevenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember	0mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedRevenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember	0mstr_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	0mstr_NumberOfIndividualCountryContributingAsTotalConsolidatedAssets / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AssetsTotalMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_GeographicConcentrationRiskMember	0mstr_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	0mstr_NumberOfIndividualCustomerContributingAsMajorCustomer / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	0mstr_NumberOfIndividualCustomerContributingAsMajorCustomer / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember	0mstr_NumberOfIndividualCustomerContributingAsMajorCustomer / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember

X

- 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

X

- 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

X

- 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

X

- 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

X

- Details

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

X

- Details

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

X

- Details

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