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Restricted Net Assets - Additional Information (Detail) - CNY (¥) ¥ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Restricted Net Assets [Line Items]
Minimum percentage, appropriation to the statutory surplus fund of the after-tax profits	10.00%
Maximum percentage of the registered capital where appropriation is not required	50.00%
Amount of restricted net assets of consolidated and unconsolidated subsidiaries	¥ 5,176,138	¥ 5,144,642
Statutory Reserves
Restricted Net Assets [Line Items]
Appropriations to statutory surplus fund and other reserve funds	¥ 701	¥ 155	¥ 496

X

- Definition

Appropriation to statutory reserve.

+ References

No definition available.

+ Details

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Namespace Prefix:	mogu_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Maximum percentage surplus fund appropriation not required.

+ References

No definition available.

+ Details

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Namespace Prefix:	mogu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Net profit appropriation to statutory surplus fund threshold percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	mogu_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Restricted Net Assets [Line Items]

+ References

No definition available.

+ Details

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Namespace Prefix:	mogu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of restricted net assets of consolidated and unconsolidated subsidiaries as of the end of the most recently completed fiscal year.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e)(3)(ii))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

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X

- Details

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Namespace Prefix:
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Balance Type:
Period Type: