Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property and equipment, net (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2019 CNY (¥)	Mar. 31, 2018 CNY (¥)	Mar. 31, 2017 CNY (¥)	Mar. 31, 2019 USD ($)	Mar. 31, 2019 CNY (¥)
Property and Equipment, Net
Gross		¥ 86,928			¥ 125,975
Less: accumulated depreciation and amortization		(20,439)			(33,945)
Net book value		66,489		$ 13,713	92,030
Depreciation and Amortization
Depreciation and amortization expenses	¥ 14,818	8,654	¥ 5,177
Buildings and property improvements
Property and Equipment, Net
Gross		45,909			61,940
Computer equipment and software
Property and Equipment, Net
Gross		33,852			53,187
Construction in progress
Property and Equipment, Net
Gross		5,110			6,959
Furniture, office and transportation equipment
Property and Equipment, Net
Gross		¥ 2,057			¥ 3,889