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Investment in equity investees- Others (Details) - CNY (¥) | 12 Months Ended
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Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015
Investment in equity investees |  |  |
Carrying value as equity method investment | ¥ 84,964,000,000 | ¥ 58,197,000,000 | ¥ 18,204,000,000
Impairment charge of equity method investments | 245,000,000 | 0 | ¥ 438,000,000
Equity method investments, publicly traded |  |  |
Investment in equity investees |  |  |
Carrying value as equity method investment | 67,767,000,000 |  |
Market values of equity method investments | 67,793,000,000 |  |
Alibaba Pictures |  |  |
Investment in equity investees |  |  |
Carrying value as equity method investment | 30,102,000,000 |  |
Not other-than-temporary decline in market value against carrying amount of equity method investment | 14,487,000,000 |  |
Individually immaterial cost method investments, fair value estimated | Carrying amount |  |  |
Investment in equity investees |  |  |
Cost method investment | 17,273,000,000 | 9,223,000,000 |
Individually immaterial cost method investments, fair value estimated | Approximate fair value |  |  |
Investment in equity investees |  |  |
Cost method investment | 46,351,000,000 | 25,639,000,000 |
Individually immaterial cost method investments, not practical to estimate fair value | Carrying amounts |  |  |
Investment in equity investees |  |  |
Cost method investments carrying value for which there is no fair value estimate | ¥ 18,131,000,000 | ¥ 24,041,000,000 |

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- Definition Fair value portion of investments accounted under the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=29638263&loc=d3e39828-111592 + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=64825282&loc=d3e32787-111569 + Details
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- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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