Represents the percentage of stock awards vesting each year after initial vesting.

No definition available.

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- Definition

Period from the date of the establishment of plan award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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- 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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Period Type:	duration

- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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

- Definition

Percentage of vesting of share-based compensation awards.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
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Data Type:	na
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Period Type:

- Details

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Data Type:	na
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Period Type:

- Details

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- Details

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Namespace Prefix:
Data Type:	na
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Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=baba_StockOptionAndRestrictedStockUnitsWithSixYearVestingScheduleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=baba_StockBasedAwards2014PlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Share-based awards- General (Details) - shares		1 Months Ended	12 Months Ended
Share-based awards- General (Details) - shares	Apr. 01, 2015	Sep. 30, 2014	Mar. 31, 2016
Share-based awards
Number of shares authorized but unissued			23,050,439
Share option and RSUs with four-year vesting schedule
Share-based awards
Vesting period			4 years
Vesting percentage per year after initial vesting			25.00%
Share option and RSUs with four-year vesting schedule \| Maximum
Share-based awards
Expiry period			6 years
Share option and RSUs with four-year vesting schedule and initial vesting at first anniversary \| Tranche one
Share-based awards
Vesting period			1 year
Vesting percentage			25.00%
Share option and RSUs with four-year vesting schedule and initial vesting at second anniversary \| Tranche one
Share-based awards
Vesting period			2 years
Vesting percentage			50.00%
Share option and RSUs with six-year vesting schedule
Share-based awards
Vesting period			6 years
Share option and RSUs with six-year vesting schedule \| Maximum
Share-based awards
Expiry period			8 years
2014 Plan
Share-based awards
Plan term		10 years
2014 Plan \| Maximum
Share-based awards
Additional number of shares subject to award	25,000,000