v2.4.1.9

Discontinued Operations - Additional Information (Detail) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Gain from sale of discontinued operations, net of tax provision | $ 0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | $ 57,377,000us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax | $ 0us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Angel.Com |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Discontinued operation, cash from sale |  | 111,200,000us-gaap_ProceedsFromDivestitureOfBusinesses / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = mstr_AngelComMember |
Discontinued operation, net cash from sale |  | 100,700,000mstr_ProceedsFromDivestitureOfBusinessNetOfTransactionCosts / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = mstr_AngelComMember |
Gain from sale of discontinued operations, net of tax provision |  | 57,377,000us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = mstr_AngelComMember |
Discontinued operation, transaction costs |  | $ 10,500,000mstr_DiscontinuedOperationsTransactionCosts / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = mstr_AngelComMember |

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- Definition Cash inflow during the period from the sale of a subsidiary, net of transaction costs incurred in relation to the sale. + References No definition available. + Details
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- Definition Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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