Amount appropriated to the enterprise expansion fund and staff welfare and bonus fund for entities incorporated in PRC.

No definition available.

Name:	baba_AmountAppropriatedToEnterpriseExpansionFundStaffWelfareAndBonusFund
Namespace Prefix:	baba_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount appropriated from retained earnings to statutory reserves for entities incorporated in PRC.

+ References

No definition available.

+ Details

Name:	baba_AmountAppropriatedToStatutoryReserves
Namespace Prefix:	baba_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the minimum percentage of net income from subsidiaries required to be appropriated towards the statutory reserve fund for entities incorporated in the People's Republic of China until the reserve balance reaches 50 percent of registered capital.

+ References

No definition available.

+ Details

Name:	baba_AppropriationOfNetIncomeToStatutoryReserveRequiredPercentage
Namespace Prefix:	baba_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage derived by dividing the results of the hedging instrument by the results of the hedged item, determining effective hedging relationship.

+ References

No definition available.

+ Details

Name:	baba_GeneralHedgeInformationHedgeEffectivenessThreshold
Namespace Prefix:	baba_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the level of the statutory reserve fund balance as a percentage of registered capital for entities incorporated in the People's Republic of China which must be attained before mandatory transfers to the reserve are no longer required.

+ References

No definition available.

+ Details

Name:	baba_ReserveLevelThresholdForMandatoryTransferPercentage
Namespace Prefix:	baba_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of treasury shares or units issued for the purpose of certain equity investment plans for management.

+ References

No definition available.

+ Details

Name:	baba_TreasuryStockIssuedCertainEquityInvestmentPlansForManagementShare
Namespace Prefix:	baba_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Details

Name:	srt_StatementGeographicalAxis=country_CN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of significant accounting policies- Others (Details) - CNY (¥) ¥ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Treasury shares
Number of ordinary shares included in treasury shares account	143,363,408	146,780,688
Statutory reserves
Percentage of after-tax profit from subsidiaries incorporated in the PRC required to be appropriated to the statutory reserves	10.00%
Limit of statutory reserve fund as a percentage of registered capital, after which allocations to statutory reserve fund are no longer required	50.00%
Appropriation to the enterprise expansion fund and staff welfare and bonus fund	¥ 0	¥ 0	¥ 0
PRC
Statutory reserves
Appropriation to statutory reserves	¥ 1,247	¥ 1,032	¥ 690
Minimum
Derivatives and hedging
Ratio determining effective hedging relationship	80.00%
Maximum
Derivatives and hedging
Ratio determining effective hedging relationship	125.00%