Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_CommonStockSharesOutstanding
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

+ Details

Name:	us-gaap_Dividends
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

+ References

+ Details

Name:	us-gaap_DividendsCommonStock
Namespace Prefix:	us-gaap_
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

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

- Definition

The per share liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

No definition available.

+ Details

Name:	us-gaap_TemporaryEquityLiquidationPreferencePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 480
-SubTopic 10
-Section S99
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=122040564&loc=d3e177068-122764

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (27)
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_TemporaryEquityRedemptionPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Value of new stock classified as temporary equity issued during the period.

+ References

No definition available.

+ Details

Name:	us-gaap_TemporaryEquityStockIssuedDuringPeriodValueNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Convertible preferred shares redemption adjusted redemption price percentage.

+ References

No definition available.

+ Details

Name:	uxin_ConvertiblePreferredSharesRedemptionAdjustedRedemptionPricePercentage
Namespace Prefix:	uxin_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Convertible preferred shares redemption adss fails to be listed or quoted number of trading days.

+ References

No definition available.

+ Details

Name:	uxin_ConvertiblePreferredSharesRedemptionAdssFailsToBeListedOrQuotedNumberOfTradingDays
Namespace Prefix:	uxin_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity method investment remaining cost amount.

+ References

No definition available.

+ Details

Name:	uxin_EquityMethodInvestmentRemainingCostAmount
Namespace Prefix:	uxin_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Fair value impacts of issuance of senior convertible preferred shares.

+ References

No definition available.

+ Details

Name:	uxin_FairValueImpactsOfIssuanceOfSeniorConvertiblePreferredShares
Namespace Prefix:	uxin_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Temporary equity percentage of liquidation preference on share issue price.

+ References

No definition available.

+ Details

Name:	uxin_TemporaryEquityPercentageOfLiquidationPreferenceOnShareIssuePrice
Namespace Prefix:	uxin_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of new stock classified as temporary equity issued during the period.

+ References

No definition available.

+ Details

Name:	uxin_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	uxin_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=uxin_SecondClosingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=uxin_NioCapitalAndJoyCapitalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=uxin_FirstClosingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=uxin_AmericanDepositorySharesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SENIOR CONVERTIBLE PREFERRED SHARES AND WARRANTS (Details) $ / shares in Units, ¥ in Thousands		1 Months Ended			12 Months Ended
	Jul. 12, 2021 USD ($) shares	Mar. 31, 2022 USD ($) $ / shares shares	Nov. 30, 2021 USD ($) shares	Jun. 30, 2021 USD ($) $ / shares shares	Jul. 12, 2022 USD ($)	Mar. 31, 2022 USD ($) Days $ / shares shares	Mar. 31, 2022 CNY (¥) Days	Mar. 31, 2021 shares	Mar. 31, 2020 shares	Dec. 31, 2019 shares	Dec. 31, 2018 shares
Temporary Equity [Line Items]
Aggregate purchase amount of convertible preferred shares				$ 165,000,000	$ 50,000,000		¥ 239,452
Ordinary shares dividend \| $						$ 0
Preferred and common stock dividend \| $						$ 0
Percentage of liquidation preference on original preferred share issue price						150.00%	150.00%
Liquidation Preference value (per share) \| $ / shares		$ 0.3433				$ 0.3433
Trading days \| Days						5	5
Adjusted redemption price percentage						8.00%	8.00%
Fair value impact of the issuance of senior convertible preferred shares						$ 20,600,000	¥ 130,400
Second Closing
Temporary Equity [Line Items]
Aggregate purchase amount of convertible preferred shares		$ 10,000,000.0	$ 27,500,000			83,100,000	¥ 526,500
Number of senior convertible preferred shares issued \| shares		29,129,042	80,104,865
Remaining amount available to purchase senior convertible preferred shares \| $		$ 12,500,000				$ 12,500,000
NIO Capital and Joy Capital
Temporary Equity [Line Items]
Aggregate purchase amount of convertible preferred shares \| $				$ 315,000,000
Warrants to purchase shares \| shares				240,314,593
NIO Capital and Joy Capital \| First Closing
Temporary Equity [Line Items]
Aggregate purchase amount of convertible preferred shares \| $	$ 100,000,000
Number of senior convertible preferred shares issued \| shares	291,290,416
Class A Ordinary Shares
Temporary Equity [Line Items]
Conversion price \| $ / shares				$ 0.3433
Ordinary shares outstanding (in shares) \| shares		1,146,044,859				1,146,044,859		1,071,621,698	846,857,596	846,807,530	839,850,038
ADS
Temporary Equity [Line Items]
Conversion price \| $ / shares				$ 1.03
Class B ordinary shares
Temporary Equity [Line Items]
Ordinary shares outstanding (in shares) \| shares		40,809,861				40,809,861		40,809,861	40,809,861	40,809,861	40,809,861