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Share-based awards- Expense by function (Details) - CNY (¥) ¥ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Share-based awards |  |  |
Share-based compensation expense | ¥ 15,995 | ¥ 16,082 | ¥ 13,028
Cost of revenue |  |  |
Share-based awards |  |  |
Share-based compensation expense | 3,893 | 4,003 | 4,176
Product development expenses |  |  |
Share-based awards |  |  |
Share-based compensation expense | 5,712 | 5,703 | 3,876
Sales and marketing expenses |  |  |
Share-based awards |  |  |
Share-based compensation expense | 1,772 | 1,963 | 1,235
General and administrative expenses |  |  |
Share-based awards |  |  |
Share-based compensation expense | 4,618 | 4,413 | 3,741
Share based awards relating to Ant Financial Services |  |  |
Share-based awards |  |  |
Unamortized compensation costs | ¥ 1,039 |  |
Weighted average period over which unamortized compensation costs expected be recognized | 1 year 7 months 6 days |  |
Share-based compensation expense | ¥ 2,188 | ¥ 5,506 | ¥ 3,788

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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