Equity Method Investment Decrease Percent.

No definition available.

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

- Definition

Equity method investment shares.

+ References

No definition available.

+ Details

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Namespace Prefix:	mogu_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Equity method investment value.

+ References

No definition available.

+ Details

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

- Definition

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Impairment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Income (loss) from share.

+ References

No definition available.

+ Details

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

- Definition

Increase decrease in sair value adjustments on available for sale securities equity securities non current.

+ References

No definition available.

+ Details

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

- Definition

Other comprehensive income loss share.

+ References

No definition available.

+ Details

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

- Definition

Other comprehensive income recycled accumulated unrealized holding gain loss on securities arising during period net of yax.

+ References

No definition available.

+ Details

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

- Definition

Other comprehensive income reversed unrealized holding gain loss on securities arising during period net of tax.

+ References

No definition available.

+ Details

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

- Definition

Ownership percentage by major shareholders.

+ References

No definition available.

+ Details

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

- Definition

Percentage Of Ownership Accounted For Available For Sale Security

+ References

No definition available.

+ Details

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

- Definition

Shares Held By Investors

+ References

No definition available.

+ Details

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Stock repurchased during period percentage.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

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- Definition

Equity securities categorized neither as held-to-maturity nor trading which are intended be sold more than one year from the balance sheet date or operating cycle, if longer.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of realized gain (loss) on investment in debt and equity securities.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Amount of gain (loss) from deconsolidation of subsidiary and derecognition of group of assets constituting transfer of business or nonprofit activity, excluding conveyance of oil and gas mineral rights and transfer of good or service in contract with customer.

+ References

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-SubTopic 10
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4582445-111684

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- Definition

The shares that, although not legally released, will be released by a future scheduled and committed debt service payment and will be allocated to employees for service rendered in the current accounting period. The ESOP documents typically define the period of service to which the shares relate. ESOP shares are released to compensate employees directly, to settle employer liabilities for other employee benefits, and to replace dividends on allocated shares that are used for debt service.

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-SubTopic 40
-Section 50
-Paragraph 1
-Subparagraph (d)
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- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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-Topic 323
-SubTopic 10
-Section 35
-Paragraph 32
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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-Paragraph 3
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Period Type:	instant

- Definition

Amount of gain (loss) on sale or disposal of an equity method investment.

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Period Type:	duration

- Definition

Amount of realized and unrealized gain (loss) on investment.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

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-Paragraph 10A
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount, after tax and before adjustment, of unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

+ References

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-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (e)
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-SubTopic 10
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-Paragraph 11
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to acquire equity securities classified as available-for-sale securities, because they are not classified as trading securities.

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-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3213-108585

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The cash inflow associated with the sale of equity securities classified as available-for-sale securities.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
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- Definition

Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.

+ References

No definition available.

+ Details

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Investments - Additional Information (Detail) ¥ in Thousands, $ in Thousands				1 Months Ended								12 Months Ended
	Nov. 20, 2018 CNY (¥) shares	Nov. 20, 2018 USD ($) shares	Oct. 31, 2017 CNY (¥)	Oct. 31, 2020 CNY (¥) shares	Oct. 31, 2020 USD ($) shares	Dec. 31, 2019 CNY (¥)	Jul. 31, 2019 CNY (¥)	Jun. 30, 2019 CNY (¥)	Jan. 31, 2018 CNY (¥)	May 31, 2016 CNY (¥)	Apr. 30, 2015 CNY (¥)	Mar. 31, 2021 CNY (¥) shares	Mar. 31, 2021 USD ($)	Mar. 31, 2020 CNY (¥)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 CNY (¥)	Mar. 31, 2018 CNY (¥)	Mar. 01, 2018 shares
Schedule of Investments [Line Items]
Available-for-sale debt securities												¥ 51,346		¥ 102,373
Impairment of AFS securities												7,443		14,259
Unrealized securities holding gain/(loss), net of tax												(31,658)	$ (4,832)	18,713		¥ 25,067
Foreign currency translation adjustments in other comprehensive income												(72,993)	(11,141)	105,433		55,440
Shares repurchased by investee, total price														6,566	$ 951
Gain/(Loss) from investments, net												¥ 86,497	13,202	(66,550)		31,236
Stock issued value																389,364
Amount of gain (loss) from deconsolidation			¥ 13,592
iSNOB Holding Limited
Schedule of Investments [Line Items]
Percentage owned			18.00%									14.50%
Registered capital										¥ 1,000
iSNOB Holding Limited \| Unrelated Third Party
Schedule of Investments [Line Items]
Ownership percentage										20.00%
iSNOB Holding Limited
Schedule of Investments [Line Items]
Percentage owned				3.35%	3.35%
Available-for-sale debt securities												¥ 22,595		76,841
Impairment of AFS securities												0		0
Unrealized securities holding gain/(loss), net of tax												8,714		36,459		15,670
Ownership percentage										80.00%
Foreign currency translation adjustments in other comprehensive income												¥ 3,717		2,004		1,470
Gain/(Loss) from investments, net				¥ 91,184
Amount of realized and unrealized gain (loss) on shares sold				46,029
iSNOB Holding Limited \| Consolidated Statements of Operations And Comprehensive Loss \| Preferred Shares outstanding
Schedule of Investments [Line Items]
Stock issued value				¥ 13,215
iSNOB Holding Limited \| Share Repurchase Agreement
Schedule of Investments [Line Items]
Stock repurchased during period, Percentage				73.40%	73.40%
iSNOB Holding Limited \| United States of America, Dollars \| Share Repurchase Agreement
Schedule of Investments [Line Items]
Shares repurchased by investee, total price \| $					$ 16,000
iSNOB Holding Limited \| Japan, Yen \| Share Repurchase Agreement
Schedule of Investments [Line Items]
Shares repurchased by investee, total price				¥ 104,399
iSNOB Holding Limited \| Redeemable Convertible Preferred Stock
Schedule of Investments [Line Items]
Convertible and redeemable preferred shares held \| shares				4,785,714	4,785,714							18,000,000
Huzan Inc.
Schedule of Investments [Line Items]
Percentage owned	6.72%								20.00%
Cash consideration									¥ 10,000
Available-for-sale debt securities	¥ 13,658											¥ 1,686		10,996			¥ 14,021
Impairment of AFS securities												4,055
Unrealized securities holding gain/(loss), net of tax														9,862			3,016
Foreign currency translation adjustments in other comprehensive income														(1,036)
Shares repurchased by investee \| shares	6,246,877	6,246,877
Shares repurchased by investee, total price	¥ 35,501	$ 5,172
Gain from investment disposal	¥ 31,236
Fair value increase or decrease												9,310
Amount of reversed unrealized holding gain (loss)												5,145
Shanghai Kuailaimai Information and Technology Co., Ltd.
Schedule of Investments [Line Items]
Percentage owned											25.00%
Cash consideration											¥ 7,500
Available-for-sale debt securities												0		0		14,259
Impairment of AFS securities								¥ 14,259				0		14,259
Unrealized securities holding gain/(loss), net of tax								6,759								(1,588)	¥ 4,912
Gain/(Loss) from investments, net								¥ 7,500
Hangzhou Ruisha Technology Co Ltd
Schedule of Investments [Line Items]
Percentage owned							18.10%
Available-for-sale debt securities												19,065		7,623
Unrealized securities holding gain/(loss), net of tax												9,726		¥ 487
Hangzhou Ruisha Technology Co Ltd \| Cash Consideration
Schedule of Investments [Line Items]
Cash consideration							¥ 7,000
Hangzhou Ruisha Technology Co Ltd \| Intangible Asset With Fair Value
Schedule of Investments [Line Items]
Cash consideration							¥ 50
Xuanwei Limited
Schedule of Investments [Line Items]
Percentage owned														5.00%
Available-for-sale debt securities												0		¥ 3,525
Unrealized securities holding gain/(loss), net of tax												2,389
Consideration received												¥ 5,914	$ 900
Xuanwei Limited \| United States of America, Dollars
Schedule of Investments [Line Items]
Cash consideration \| $															$ 500
Xuanwei Limited \| Japan, Yen
Schedule of Investments [Line Items]
Cash consideration														3,525
JM Weshop (Cayman) Inc.
Schedule of Investments [Line Items]
Equity method investment shares owned \| shares																		40,000,000
Equity method investment ownership percentage							33.00%											40.00%
ESOP Shares that may be transferred to grantees who are employees of JM Weshop \| shares												10,000,000
Share of income/(loss)														(114,104)		5,752
Share of other comprehensive (loss)/income														(145)		938
Equity Method Investment Decrease Percent							7.00%
Gain loss on sale of equity method investment							¥ 25,132
Equity method investment impairment						¥ 33,918								33,918
JM Weshop (Cayman) Inc. \| Investment Cost
Schedule of Investments [Line Items]
Share based compensation expenses														934		1,084
JM Weshop (Cayman) Inc. \| Share of Results of Equity Investee
Schedule of Investments [Line Items]
Share based compensation expenses														¥ 1,390		¥ 1,483
JM Weshop (Cayman) Inc. \| Flying Get Limited
Schedule of Investments [Line Items]
Ownership interest																		60.00%
Jiaxing Neixiangyoupan Equity Investment Fund Partnership
Schedule of Investments [Line Items]
Equity method investment ownership percentage												14.80%
Share of income/(loss)												¥ 478
The value of ownership under the equity method investments												¥ 12,000