Amount of customer advances assumed at the acquisition date.

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Amount of assets, excluding identifiable intangible assets and deferred tax liabilities, but including fair value of the noncontrolling interest in the acquiree, acquired at the acquisition date.

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The amount of operating lease right-of-use assets relating to land use rights recognized as of the acquisition date.

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Amount of payables and accruals for cost of revenue assumed at the acquisition date.

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Fair value at acquisition-date of the assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interests issued by the acquirer, including but not limited to, instruments or interests issued or issuable in consideration for the business combination.

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Amount of investments in debt and equity securities, including, but not limited to, held-to-maturity, trading and available-for-sale expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquiree.

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

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Reference 11: http://www.xbrl.org/2003/role/disclosureRef
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Reference 12: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 942
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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Significant mergers and acquisitions and investments - Sun Art (Details) ¥ in Millions, $ in Millions, $ in Billions	1 Months Ended				6 Months Ended	12 Months Ended					15 Months Ended
	Dec. 31, 2020 CNY (¥)	Dec. 31, 2020 HKD ($)	Oct. 31, 2020 CNY (¥)	Oct. 31, 2020 USD ($)	Mar. 31, 2021 CNY (¥)	Mar. 31, 2021 CNY (¥)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)	Mar. 31, 2019 CNY (¥)	Mar. 31, 2021 CNY (¥)	Mar. 31, 2021 USD ($)	Sep. 30, 2020
Business Acquisition [Line Items]
Cash consideration						¥ 27,014		¥ 16,022		¥ 48,206
The allocation of the purchase price at the date of acquisition
Goodwill					¥ 292,771	292,771		276,782		264,935	¥ 292,771	$ 44,686
Total purchase price is comprised of:
- cash consideration						27,014		16,022		48,206
Revenue						717,289	$ 109,480	509,711		376,844
Net income						¥ 143,284	$ 21,869	¥ 140,350		¥ 80,234
Sun Art Retail Group Limited
Total purchase price is comprised of:
Revenue									¥ 95,400		124,300
Net income									¥ 3,000		¥ 3,800
Trade names, trademarks and domain names \| Maximum
Total purchase price is comprised of:
Estimated amortization periods						20 years	20 years
Non-compete agreements \| Maximum
Total purchase price is comprised of:
Estimated amortization periods						10 years	10 years
Developed technology and patents \| Maximum
Total purchase price is comprised of:
Estimated amortization periods						7 years	7 years
User base and customer relationships \| Maximum
Total purchase price is comprised of:
Estimated amortization periods						16 years	16 years
Sun Art Retail Group Limited
Business Acquisition [Line Items]
Equity interest held in subsidiary (as a percentage)	74.00%	74.00%
Sun Art Retail Group Limited
Business Acquisition [Line Items]
Equity interest (as a percent)													31.00%
Cash consideration			¥ 24,136	$ 3,600
Cash consideration for additional equity interest acquired	¥ 4,100	$ 4.9
Reduction of noncontrolling interest	¥ 4,592
Equity interest in consolidated subsidiary (as a percent)			67.00%
The allocation of the purchase price at the date of acquisition
Net assets acquired			¥ 49,672
Goodwill			13,474
Deferred tax liabilities			(9,629)
Noncontrolling interests			(23,684)
Total			46,695
Total purchase price is comprised of:
- cash consideration			24,136	$ 3,600
- fair value of previously held equity interests			22,559
Total			46,695
Property and equipment			27,333
Operating lease right-of-use assets relating to land use rights			22,997
Payables and accruals for cost of revenue			14,681
Short-term investments			14,387
Customer advances			11,082
Inventories			¥ 9,341
Weighted average amortization period			11 years 9 months 18 days	11 years 9 months 18 days
Gain recognized in relation to the revaluation of previously held equity interest relating to obtaining control						¥ 6,381
Revenue					¥ 42,900
Sun Art Retail Group Limited \| Maximum
Total purchase price is comprised of:
Estimated amortization periods			13 years	13 years
Sun Art Retail Group Limited \| Trade names, trademarks and domain names
The allocation of the purchase price at the date of acquisition
Amortizable intangible assets			¥ 11,500
Sun Art Retail Group Limited \| Non-compete agreements
The allocation of the purchase price at the date of acquisition
Amortizable intangible assets			4,700
Sun Art Retail Group Limited \| Developed technology and patents
The allocation of the purchase price at the date of acquisition
Amortizable intangible assets			615
Sun Art Retail Group Limited \| User base and customer relationships
The allocation of the purchase price at the date of acquisition
Amortizable intangible assets			¥ 47