XML 77 R63.htm IDEA: XBRL DOCUMENT v3.20.4

Schedule of Effective Tax Rate for (Loss) Income Before Income Taxes (Detail)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Effective Tax Rates [Line Items]
Effective tax rates	62.30%	10.20%	(9.90%)
U.S.
Schedule Of Effective Tax Rates [Line Items]
Effective tax rates	33.80%	1.70%	45.80%
Foreign
Schedule Of Effective Tax Rates [Line Items]
Effective tax rates	16.70%	13.20%	16.40%

X

- Definition

Schedule of effective tax rates.

+ References

No definition available.

+ Details

Name:	mstr_ScheduleOfEffectiveTaxRatesLineItems
Namespace Prefix:	mstr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

+ Details

Name:	us-gaap_EffectiveIncomeTaxRateContinuingOperations
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_DomesticCountryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_IncomeTaxAuthorityAxis=us-gaap_ForeignCountryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: