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Commitments and Contingencies - Additional Information (Detail)
₨ in Millions, $ in Millions
12 Months Ended
Mar. 31, 2023
INR (₨)
Mar. 31, 2023
USD ($)
Mar. 31, 2022
INR (₨)
Loss Contingencies [Line Items]      
Capital commitments, estimated amounts of contracts remaining to be executed on the capital account ₨ 25,666.0   ₨ 21,115.5
Additional operating lease commitments with leases which have not yet commenced 845.5    
Operating lease expense ₨ 16,164.9 $ 196.7 14,295.7
Minimum [Member]      
Loss Contingencies [Line Items]      
Additional operating lease commitments with leases which have not yet commenced, lease term 9 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 ₨ 9,456.9   ₨ 9,226.0