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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical)	Sep. 30, 2020	Sep. 30, 2019
Ant Group
Equity interest (as a percent)	33.00%	33.00%

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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

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- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=baba_AntFinancialServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: