XML 71 R156.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Benefits - Summary of Employee Benefit Costs (Detail) - INR (₨)
₨ in Millions
 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Disclosure Of employee benefits cost [Line Items]      
Employee benefit cost ₨ 326,571 ₨ 299,774 ₨ 272,223
Cost of revenues [member]      
Disclosure Of employee benefits cost [Line Items]      
Employee benefit cost 279,356 251,818 228,937
Selling and marketing expenses [member]      
Disclosure Of employee benefits cost [Line Items]      
Employee benefit cost 30,763 30,972 28,070
General and administrative expenses [member]      
Disclosure Of employee benefits cost [Line Items]      
Employee benefit cost ₨ 16,452 ₨ 16,984 ₨ 15,216