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Expenses by Nature - Summary of Expenses by Nature (Detail) - INR (₨)
₨ in Millions
 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Expenses by nature [abstract]      
Employee compensation ₨ 326,571 ₨ 299,774 ₨ 272,223
Sub-contracting/ technical fees 90,521 94,725 84,437
Cost of hardware and software 11,491 13,567 18,985
Travel 18,169 17,768 17,399
Facility expenses 19,733 22,213 21,044
Depreciation, amortization and impairment 20,862 19,474 21,124
Communication 4,812 4,561 5,353
Legal and professional fees 4,733 4,361 4,690
Rates, taxes and insurance 3,004 1,621 2,400
Marketing and brand building 2,532 2,714 3,140
Lifetime expected credit loss and provision for deferred contract cost 1,043 980 6,565
Miscellaneous expenses 5,344 11,736 4,705
Total cost of revenues, selling and marketing expenses and general and administrative expenses ₨ 508,815 ₨ 493,494 ₨ 462,065