XML 155 R140.htm IDEA: XBRL DOCUMENT v3.20.1
Revenue - Additional Information (Detail) - INR (₨)
₨ in Millions
12 Months Ended
Apr. 01, 2018
Mar. 31, 2020
Mar. 31, 2019
Text block [abstract]      
Unearned revenue   ₨ 21,193 ₨ 14,570
Unbilled revenue recognized On contract assets ₨ 17,469 13,068 13,558
Transaction price allocated to remaining performance obligations   ₨ 360,033 ₨ 373,879
Percentage of transaction price allocated to remaining performance obligation as revenues   62.00% 59.00%
Explanation of when entity expects to recognise transaction price allocated to remaining performance obligations as revenue   approximately 62% is expected to be recognized as revenues within two years, and the remainder thereafter. approximately 59% is expected to be recognized as revenues within two years, and the remainder thereafter.