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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
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-Section 50
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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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.

+ References

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(13))
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Property and equipment, net (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2017 CNY (¥)	Mar. 31, 2016 CNY (¥)	Mar. 31, 2015 CNY (¥)	Mar. 31, 2017 USD ($)	Mar. 31, 2017 CNY (¥)
Property and Equipment, Net
Gross		¥ 21,810			¥ 32,467
Less: accumulated depreciation and amortization		(8,181)			(12,261)
Net book value		13,629		$ 2,936	20,206
Depreciation and Amortization
Depreciation and amortization expenses	¥ 5,177	3,699	¥ 2,282
Computer equipment and software
Property and Equipment, Net
Gross		13,289			18,427
Buildings and leasehold improvements
Property and Equipment, Net
Gross		6,155			10,529
Construction in progress
Property and Equipment, Net
Gross		1,883			2,627
Furniture, office and transportation equipment
Property and Equipment, Net
Gross		¥ 483			¥ 884