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Future Minimum Lease Payments (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2021
INR (₨)
Mar. 31, 2021
USD ($)
Mar. 31, 2020
INR (₨)
Operating Leased Assets [Line Items]      
2022 ₨ 11,783.1 $ 161.1  
2023 10,951.6 149.7  
2024 10,125.8 138.4  
2025 9,553.1 130.6  
2026 9,201.9 125.8  
Thereafter 50,337.5 688.2  
Total lease payments 101,953.0 1,393.8  
Less: imputed interest 31,531.0 431.0  
Total operating lease liabilities ₨ 70,422.0 $ 962.8 ₨ 65,615.1
Weighted average remaining lease term (in years) 9 years 9 months 18 days 9 years 9 months 18 days  
Weighted average discount rate 7.00% 7.00%