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Intangible assets, net - General (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2022 CNY (¥)	Mar. 31, 2021 CNY (¥)	Mar. 31, 2020 CNY (¥)	Mar. 31, 2022 USD ($)
Intangible assets, net
Gross carrying amount	¥ 116,929	¥ 131,217
Less: accumulated amortization and impairment	(57,698)	(60,384)
Net book value	59,231	70,833		$ 9,343
Intangible assets acquired	1,000	20,750	¥ 5,626
User base and customer relationships
Intangible assets, net
Gross carrying amount	47,941	50,066
Trade names, trademarks and domain names
Intangible assets, net
Gross carrying amount	39,080	39,440
Non-compete agreements
Intangible assets, net
Gross carrying amount	14,436	19,445
Developed technology and patents
Intangible assets, net
Gross carrying amount	7,088	12,855
Licenses copyrights and others
Intangible assets, net
Gross carrying amount	¥ 8,384	¥ 9,411

X

- Definition

Accumulated amount of amortization of assets and the amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of a finite-lived intangible asset to fair value, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 926
-SubTopic 20
-Section 50
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-URI http://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

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