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Foreign Currency Translation Reserve - Summary of Movement in Foreign Currency Translation Reserve Attributable to Equity Holders (Detail) ₨ in Millions, $ in Millions | 12 Months Ended
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Mar. 31, 2020 INR (₨) | Mar. 31, 2020 USD ($) | Mar. 31, 2019 INR (₨) | Mar. 31, 2018 INR (₨)
Disclosure of foreign currency translation reserves [line items] |  |  |  |
Balance at the beginning of the year | ₨ 570,753 |  | ₨ 485,346 | ₨ 522,695
Translation difference related to foreign operations, net | 8,447 | $ 112 | 3,238 | 3,576
Change in effective portion of hedges of net investment in foreign operations |  |  | (287) | (49)
Total comprehensive income for the year | 102,326 | 1,356 | 91,196 | 76,975
Balance at the end of the year | 559,333 | 7,420 | 570,753 | 485,346
Hosted data center services business [member] |  |  |  |
Disclosure of foreign currency translation reserves [line items] |  |  |  |
Reclassification of foreign currency translation differences to profit and loss on sale of business |  |  | 4,131 |
Workday business [member] |  |  |  |
Disclosure of foreign currency translation reserves [line items] |  |  |  |
Reclassification of foreign currency translation differences to profit and loss on sale of business |  |  | 79 |
Foreign currency translation reserve [member] |  |  |  |
Disclosure of foreign currency translation reserves [line items] |  |  |  |
Balance at the beginning of the year | 15,250 |  | 16,618 | 13,107
Translation difference related to foreign operations, net | 8,289 |  | 3,129 |
Change in effective portion of hedges of net investment in foreign operations |  |  | (287) |
Total comprehensive income for the year | 8,289 |  | (1,368) | 3,511
Balance at the end of the year | ₨ 23,539 | $ 312 | 15,250 | ₨ 16,618
Foreign currency translation reserve [member] | Hosted data center services business [member] |  |  |  |
Disclosure of foreign currency translation reserves [line items] |  |  |  |
Reclassification of foreign currency translation differences to profit and loss on sale of business |  |  | (4,131) |
Foreign currency translation reserve [member] | Workday business [member] |  |  |  |
Disclosure of foreign currency translation reserves [line items] |  |  |  |
Reclassification of foreign currency translation differences to profit and loss on sale of business |  |  | ₨ (79) |

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