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Intangible assets (Details 2) - INR (₨) ₨ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Intangible Assets Other Than Goodwill | ₨ 634,730 | ₨ 679,991 | ₨ 665,097
Gross carrying amount [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 2,392,622 | 2,085,116 | 1,744,218
Acquisitions during the year | 325,471 | 307,506 | 340,898
Disposals during the year | 0 | 0 | 0
Balance at ending | 2,718,093 | 2,392,622 | 2,085,116
Accumulated depreciation and amortization [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 1,712,631 | 1,420,019 | 1,182,294
Acquisitions during the year | 370,932 | 292,612 | 237,725
Impairment loss on intangibles |  |  | 0
Balance at ending | 2,083,363 | 1,712,631 | 1,420,019
Bandwidth Capacity [Member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Intangible Assets Other Than Goodwill | 149,210 | 223,693 | 298,175
Bandwidth Capacity [Member] | Gross carrying amount [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 736,388 | 736,388 | 684,334
Acquisitions during the year | 0 | 0 | 52,054
Disposals during the year | 0 | 0 | 0
Balance at ending | 736,388 | 736,388 | 736,388
Bandwidth Capacity [Member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 512,695 | 438,213 | 367,344
Acquisitions during the year | 74,483 | 74,482 | 70,869
Impairment loss on intangibles |  |  | 0
Balance at ending | 587,178 | 512,695 | 438,213
Computer software [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Intangible Assets Other Than Goodwill | 450,958 | 418,587 | 326,061
Computer software [member] | Gross carrying amount [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 1,578,234 | 1,270,728 | 986,884
Acquisitions during the year | 325,471 | 307,506 | 283,844
Disposals during the year | 0 | 0 | 0
Balance at ending | 1,903,704 | 1,578,234 | 1,270,728
Computer software [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 1,159,647 | 944,667 | 781,419
Acquisitions during the year | 293,299 | 214,980 | 163,248
Impairment loss on intangibles |  |  | 0
Balance at ending | 1,452,946 | 1,159,647 | 944,667
Licences and franchises [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Intangible Assets Other Than Goodwill | 34,561 | 37,711 | 40,861
Licences and franchises [member] | Gross carrying amount [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 78,000 |  | 73,000
Acquisitions during the year | 0 | 0 | 5,000
Disposals during the year | 0 | 0 | 0
Balance at ending | 78,000 | 78,000 |
Licences and franchises [member] | Accumulated depreciation and amortization [member] |  |  |
Disclosure Of Intangible Assets And Goodwill Explanatory [Line Items] |  |  |
Balance at beginning | 40,289 | 37,139 | 33,531
Acquisitions during the year | 3,150 | 3,150 | 3,608
Impairment loss on intangibles |  |  | 0
Balance at ending | ₨ 43,439 | ₨ 40,289 | ₨ 37,139

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- Definition The increase in intangible assets other than goodwill resulting from acquisitions through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2021-01-01 -Paragraph 118 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_118_e_i&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The decrease in intangible assets other than goodwill resulting from disposals. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2021-01-01 -Paragraph 118 -Subparagraph e -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2021-en-r&anchor=para_118_e_ii&doctype=Standard -URIDate 2021-03-24 + Details
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