XML 53 R83.htm IDEA: XBRL DOCUMENT v3.20.1
Property, Plant and Equipment - Disclosure of Summary about Property, Plant and Equipment (Parenthetical) (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2020
INR (₨)
Mar. 31, 2019
INR (₨)
Mar. 31, 2018
INR (₨)
Mar. 31, 2020
USD ($)
Disclosure of detailed information about property, plant and equipment [line items]        
Net carrying value ₨ 81,120 ₨ 70,601   $ 1,076
Computer equipment and software [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Net carrying value 16,844 16,375    
Software platform [member]        
Disclosure of detailed information about property, plant and equipment [line items]        
Impairment charges ₨ 0 ₨ 1,480 ₨ 0