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Other Operating Income - Summary of Gain Loss on Sale of Business (Detail)
₨ in Millions
12 Months Ended
Mar. 31, 2019
INR (₨)
Hosted data center services business [member]  
Disclosure of other operating income [line items]  
Cash considerations ₨ 25,432
Less: Carrying amount of net assets disposed (26,455)
Add: Reclassification of exchange difference on foreign currency translation 4,131
Gain on sale 3,108
Workday business [member]  
Disclosure of other operating income [line items]  
Cash considerations 6,645
Less: Carrying amount of net assets disposed (5,475)
Add: Reclassification of exchange difference on foreign currency translation 79
Gain on sale ₨ 1,249