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Balances Payable to Related Parties (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
INR (₨)
Related Party Transaction [Line Items]      
Balances in non-interest-bearing deposits ₨ 1,731,590.0 $ 22,968.4 ₨ 1,420,309.4
Balances in interest-bearing deposits 9,730,481.3 129,068.6 7,804,717.5
Principal Owner      
Related Party Transaction [Line Items]      
Balances in non-interest-bearing deposits 35,128.7   32,176.8
Balances in interest-bearing deposits 1,662.0   733.1
Accrued expenses and other liabilities 1,002.8   836.4
Total 37,793.5   33,746.3
Others      
Related Party Transaction [Line Items]      
Balances in non-interest-bearing deposits 8,258.8   14,170.1
Balances in interest-bearing deposits 5,954.8   1,732.9
Accrued expenses and other liabilities 0.0   0.0
Total 14,213.6   15,903.0
Related Party      
Related Party Transaction [Line Items]      
Balances in non-interest-bearing deposits 43,387.5 575.5 46,346.9
Balances in interest-bearing deposits 7,616.8 101.0 2,466.0
Accrued expenses and other liabilities 1,002.8 13.3 836.4
Total ₨ 52,007.1 $ 689.8 ₨ 49,649.3