v2.4.1.9

Restructuring - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2014 Employee | Sep. 30, 2014
Restructuring Cost and Reserve [Line Items] |  |  |
Total Expected Plan Costs | $ 15,000,000us-gaap_RestructuringAndRelatedCostExpectedCost1 | 15,000,000us-gaap_RestructuringAndRelatedCostExpectedCost1 | $ 18,400,000us-gaap_RestructuringAndRelatedCostExpectedCost1
Total expected costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Decrease in total expected plan costs | (3,400,000)mstr_RestructuringAndRelatedCostDecreaseInExpectedCost / us-gaap_RestructuringCostAndReserveAxis = mstr_TotalCostsMember |  |
Total expected severance and related employee benefit costs |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Decrease in total expected plan costs | $ (3,100,000)mstr_RestructuringAndRelatedCostDecreaseInExpectedCost / us-gaap_RestructuringCostAndReserveAxis = mstr_SeveranceAndOtherEmployeeRelatedCostsMember |  |
2014 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Number of workforce expected to be reduced |  | 777us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_RestructuringPlanAxis = mstr_TwentyFourteenRestructuringPlanMember |
2014 Restructuring Plan | Domestic |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Number of workforce expected to be reduced |  | 217us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_RestructuringPlanAxis = mstr_TwentyFourteenRestructuringPlanMember / us-gaap_StatementGeographicalAxis = us-gaap_NorthAmericaMember |
2014 Restructuring Plan | Asia Pacific |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Number of workforce expected to be reduced |  | 400us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_RestructuringPlanAxis = mstr_TwentyFourteenRestructuringPlanMember / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember |
2014 Restructuring Plan | EMEA |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Number of workforce expected to be reduced |  | 141us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_RestructuringPlanAxis = mstr_TwentyFourteenRestructuringPlanMember / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember |
2014 Restructuring Plan | Latin America |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Number of workforce expected to be reduced |  | 19us-gaap_RestructuringAndRelatedCostExpectedNumberOfPositionsEliminated / us-gaap_RestructuringPlanAxis = mstr_TwentyFourteenRestructuringPlanMember / us-gaap_StatementGeographicalAxis = us-gaap_LatinAmericaMember |

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- Definition Decrease in the amount expected to be recognized in earnings for the specified restructuring cost. + References No definition available. + Details
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Namespace Prefix: | mstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount expected to be recognized in earnings for the specified restructuring cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 5 -Section P -Subsection 3, 4 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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Period Type: | instant

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- Definition The expected number of positions to be eliminated as a result of restructuring activities. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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