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Subsequent Events - Additional Information (Detail) - Northern Virginia Office Space - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Jan. 31, 2018 | Dec. 31, 2017
Subsequent Event [Line Items] |  |
Lease expiration date |  | 2020-12
Subsequent Event |  |
Subsequent Event [Line Items] |  |
Lease expiration date | 2030-12 |
Subsequent Event | Minimum |  |
Subsequent Event [Line Items] |  |
Annual base rent | $ 10.0 |
Subsequent Event | Maximum |  |
Subsequent Event [Line Items] |  |
Annual base rent | $ 13.0 |

X
- Definition Annual base rent before tenant allowances and incentives. + References No definition available. + Details
Name: | mstr_AnnualBaseRentBeforeTenantAllowancesAndIncentives
Namespace Prefix: | mstr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Date which lease or group of leases is set to expire, in YYYY-MM format. + References No definition available. + Details
Name: | mstr_LeaseExpirationMonthYear
Namespace Prefix: | mstr_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |