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Investment securities and fair value disclosure (Details 4) - Contingent consideration and put liability in relation to investments and acquisitions - CNY (¥) ¥ in Millions | 12 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014 | Mar. 31, 2013
Contingent consideration and put liability in relation to investments and acquisitions |  |  |
Balance at beginning | ¥ 326 | ¥ 117 | ¥ 104
Repayment | (227) |  |
Additions | 1,094 | 31 |
Increase (decrease) in fair value | 85 | 178 | 13
Balance at end | ¥ 1,278 | ¥ 326 | ¥ 117

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- Definition Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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