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Fair Value Measurement - Fair Value Measurements of Roll Forward In Level 3 Financial Instruments (Parenthetical) (Detail) ¥ in Thousands	12 Months Ended
	Mar. 31, 2021 CNY (¥)
Fair Value Disclosures [Abstract]
Unrealized security holding gains	¥ 46,029

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- Definition

Unrealized security holding gains.

+ References

No definition available.

+ Details

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

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- References

No definition available.

+ Details

Name:	us-gaap_FairValueDisclosuresAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration