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Commitments and Contingencies - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2024
INR (₨)
Mar. 31, 2024
USD ($)
Mar. 31, 2023
INR (₨)
Mar. 31, 2022
INR (₨)
Loss Contingencies [Line Items]        
Capital commitments, estimated amounts of contracts remaining to be executed on the capital account ₨ 45,346.5   ₨ 25,666.0  
Additional operating lease commitments with leases which have not yet commenced 1,002.6      
Operating lease expense ₨ 25,447.4 $ 305.3 16,164.9 ₨ 14,295.7
Minimum [Member]        
Loss Contingencies [Line Items]        
Additional operating lease commitments with leases which have not yet commenced, lease term 2 years      
Maximum [Member]        
Loss Contingencies [Line Items]        
Additional operating lease commitments with leases which have not yet commenced, lease term 21 years      
Indirect Taxes And Other Claims        
Loss Contingencies [Line Items]        
Contingencies, estimated possible loss ₨ 38,498.3   ₨ 9,456.9