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Goodwill (Details) ¥ in Millions, $ in Millions | 12 Months Ended
--- | ---
Mar. 31, 2017 USD ($) | Mar. 31, 2017 CNY (¥) | Mar. 31, 2016 CNY (¥) | Mar. 31, 2015 CNY (¥)
Changes in goodwill |  |  |  |
Goodwill at the beginning of period |  | ¥ 81,645 | ¥ 41,933 |
Additions |  | 43,408 | 50,723 |
Deconsolidation of a subsidiary |  |  | (10,556) |
Impairment of goodwill |  | 0 | (455) | ¥ (175)
Foreign currency translation adjustments |  | 367 |  |
Goodwill at the end of period | $ 18,221 | 125,420 | 81,645 | 41,933
Goodwill, Impaired, Accumulated Impairment Loss |  |  |  |
Gross goodwill |  | 128,870 | 85,095 |
Accumulated impairment losses of goodwill |  | 3,450 | 3,450 |
Core commerce |  |  |  |
Changes in goodwill |  |  |  |
Goodwill at the beginning of period |  | 66,223 | 16,297 |
Additions |  | 13,298 | 49,926 |
Foreign currency translation adjustments |  | 334 |  |
Goodwill at the end of period |  | 79,855 | 66,223 | 16,297
Cloud computing |  |  |  |
Changes in goodwill |  |  |  |
Goodwill at the beginning of period |  | 368 | 368 |
Goodwill at the end of period |  | 368 | 368 | 368
Digital media and entertainment |  |  |  |
Changes in goodwill |  |  |  |
Goodwill at the beginning of period |  | 10,378 | 20,498 |
Additions |  | 30,110 | 797 |
Deconsolidation of a subsidiary |  |  | (10,556) |
Impairment of goodwill |  |  | (361) |
Foreign currency translation adjustments |  | 33 |  |
Goodwill at the end of period |  | 40,521 | 10,378 | 20,498
Innovation initiatives and others |  |  |  |
Changes in goodwill |  |  |  |
Goodwill at the beginning of period |  | 4,676 | 4,770 |
Impairment of goodwill |  |  | (94) |
Goodwill at the end of period |  | ¥ 4,676 | ¥ 4,676 | ¥ 4,770

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