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OTHER PAYABLES AND OTHER CURRENT LIABILITIES - Schedule of Current and Non-current Portions of Liabilities (Parenthetical) (Details) - CNY (¥) ¥ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 01, 2022 | Mar. 31, 2022
Accrued advertising expenses waived after full payment |  | ¥ 56.1
Accrued advertising expense |  | ¥ 154.3
Subsequent Event |  |
Payment of accrued advertising expense | ¥ 50.0 |

X
- Definition Accrued advertising expense. + References No definition available. + Details
Name: | uxin_AccruedAdvertisingExpense
Namespace Prefix: | uxin_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Accrued advertising expenses waived after full payment. + References No definition available. + Details
Name: | uxin_AccruedAdvertisingExpensesWaivedAfterFullPayment
Namespace Prefix: | uxin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Payment of accrued advertising expense. + References No definition available. + Details
Name: | uxin_PaymentOfAccruedAdvertisingExpense
Namespace Prefix: | uxin_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |