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Investment in equity investees (Details) $ in Millions | 12 Months Ended
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Mar. 31, 2015 USD ($) | Mar. 31, 2015 CNY (¥) | Mar. 31, 2014 CNY (¥) | Mar. 31, 2013 CNY (¥)
Cost method |  |  |  |
Balance at beginning of period |  | ¥ 13,589,000,000 | ¥ 1,359,000,000 | ¥ 1,316,000,000
Additions |  | 12,304,000,000 | 12,655,000,000 | 392,000,000
Less: disposals and transfers |  | (9,818,000,000) | (262,000,000) | (99,000,000)
Less: impairment loss |  | (419,000,000) | (119,000,000) | (245,000,000)
Foreign currency translation adjustments |  | 17,000,000 | (44,000,000) | (5,000,000)
Balance at end of period |  | 15,673,000,000 | 13,589,000,000 | 1,359,000,000
Equity method |  |  |  |
Balance at beginning of period |  | 4,077,000,000 | 196,000,000 | 326,000,000
Additions |  | 16,518,000,000 | 3,908,000,000 | 190,000,000
Share of results and other comprehensive income |  | (1,148,000,000) | (34,000,000) | (14,000,000)
Less: disposals and transfers |  | (806,000,000) |  | (306,000,000)
Less: impairment loss |  | (438,000,000) | 0 | 0
Foreign currency translation adjustments |  | 1,000,000 | 7,000,000 |
Balance at end of period |  | 18,204,000,000 | 4,077,000,000 | 196,000,000
Total, cost and equity methods |  |  |  |
Balance at beginning of period |  | 17,666,000,000 | 1,555,000,000 | 1,642,000,000
Additions |  | 28,822,000,000 | 16,563,000,000 | 582,000,000
Share of results and other comprehensive income |  | (1,148,000,000) | (34,000,000) | (14,000,000)
Less: disposals and transfers |  | (10,624,000,000) | (262,000,000) | (405,000,000)
Less: impairment loss |  | (857,000,000) | (119,000,000) | (245,000,000)
Foreign currency translation adjustments |  | 18,000,000 | (37,000,000) | (5,000,000)
Balance at end of period | $ 5,465 | 33,877,000,000 | 17,666,000,000 | 1,555,000,000
Allocated Share-based Compensation Expense |  | 13,028,000,000 | 2,844,000,000 | ¥ 1,259,000,000
Equity investee with fair value adjustments of contingent consideration |  |  |  |
Total, cost and equity methods |  |  |  |
Fair value adjustment of contingent consideration |  | (68,000,000) | ¥ 178,000,000 |
Equity investee with share-based awards relating to Ant Financial Services |  |  |  |
Total, cost and equity methods |  |  |  |
Allocated Share-based Compensation Expense |  | ¥ 58,000,000 |  |

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