Amount appropriated to the enterprise expansion fund and staff welfare and bonus fund for entities incorporated in PRC.

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Amount appropriated from retained earnings to statutory reserves for entities incorporated in PRC.

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Represents the minimum percentage of net income from subsidiaries required to be appropriated towards the statutory reserve fund for entities incorporated in the People's Republic of China until the reserve balance reaches 50 percent of registered capital.

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Percentage derived by dividing the results of the hedging instrument by the results of the hedged item, determining effective hedging relationship.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods; total amount due to the entity from outside sources, including trade accounts receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods; total amount due to the entity, and amount of other assets that are expected to be realized or consumed after one year or the normal operating cycle, if longer.

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Represents the level of the statutory reserve fund balance as a percentage of registered capital for entities incorporated in the People's Republic of China which must be attained before mandatory transfers to the reserve are no longer required.

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No definition available.

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Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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Amount of deferred tax liability attributable to taxable temporary differences.

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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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Summary of significant accounting policies- Others (Details) $ in Millions	12 Months Ended
	Mar. 31, 2018 CNY (¥)	Mar. 31, 2017 CNY (¥) shares	Mar. 31, 2016 CNY (¥)	Mar. 31, 2018 USD ($) shares	Mar. 31, 2018 CNY (¥) shares
Statutory reserves
Percentage of after-tax profit from subsidiaries incorporated in the PRC required to be appropriated to the statutory reserves	10.00%
Limit of statutory reserve fund as a percentage of registered capital, after which allocations to statutory reserve fund are no longer required	50.00%
Reclassification of comparative figures
Reduction to current prepayments, receivables and other assets		¥ 28,408,000,000		$ 6,891	¥ 43,228,000,000
Prepayments, receivables and other assets, non-current		8,703,000,000		2,694	16,897,000,000
Reduction to accrued expenses, accounts payable and other liabilities		46,979,000,000		12,940	81,165,000,000
Deferred tax liabilities		10,361,000,000		$ 3,079	¥ 19,312,000,000
Accounting Standards Update 2015-17 \| Adjustment
Reclassification of comparative figures
Reduction to current prepayments, receivables and other assets		(652,000,000)
Prepayments, receivables and other assets, non-current		652,000,000
Reduction to accrued expenses, accounts payable and other liabilities		(207,000,000)
Deferred tax liabilities		207,000,000
PRC
Statutory reserves
Appropriation to statutory reserves	¥ 298,000,000	836,000,000	¥ 529,000,000
Appropriation to the enterprise expansion fund and staff welfare and bonus fund	¥ 0	¥ 0	¥ 0
Minimum
Derivatives and hedging
Ratio determining effective hedging relationship	80.00%
Maximum
Derivatives and hedging
Ratio determining effective hedging relationship	125.00%
Share repurchase for purpose of certain equity investment plans for management
Treasury shares
Number of ordinary shares included in treasury shares account \| shares		20,789,596		20,789,596	20,789,596
Company's share of an equity method investee's in the Company \| Suning
Treasury shares
Number of ordinary shares included in treasury shares account \| shares		5,262,306		4,162,856	4,162,856