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Share-based awards- RSUs (Details) $ / shares in Units, ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2022 CNY (¥) shares	Mar. 31, 2022 USD ($) $ / shares shares	Mar. 31, 2021 CNY (¥) shares	Mar. 31, 2020 CNY (¥)	Mar. 31, 2022 $ / shares
Weighted-average grant-date fair value
Share-based compensation expense	¥ 23,971	$ 3,782	¥ 50,120	¥ 31,742
RSUs
Summary of changes in the RSUs
Awarded and unvested at beginning of year | shares	63,363,237	63,363,237
Granted | shares	28,230,674	28,230,674
Vested | shares	(23,702,603)	(23,702,603)
Cancelled/forfeited | shares	(7,215,021)	(7,215,021)
Awarded and unvested at end of year | shares	60,676,287	60,676,287	63,363,237
Expected to vest | shares	50,145,101
Weighted-average grant-date fair value
Awarded and unvested at beginning of year | $ / shares		$ 192.19
Granted | $ / shares		200.52
Vested | $ / shares		175.56
Cancelled/forfeited | $ / shares		203.85
Awarded and unvested at end of year | $ / shares		$ 201.17
Expected to vest | $ / shares					$ 200.96
Unamortized compensation costs | ¥	¥ 25,636
Weighted average period over which unamortized compensation costs expected be recognized	1 year 10 months 24 days	1 year 10 months 24 days
Share-based compensation expense | ¥	¥ 30,313		¥ 28,934	¥ 25,651
RSUs | Maximum
Weighted-average grant-date fair value
Expiry period	10 years	10 years

X

- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans that are expected to vest (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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As of the balance sheet date, the number of shares expected to vest awards other than stock options outstanding can be converted under the equity-based awards plan.

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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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.

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