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Amounts Subject to Enforceable Netting Arrangements (Detail)
₨ in Millions, $ in Millions
Mar. 31, 2020
INR (₨)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
INR (₨)
Derivative [Line Items]      
Derivative assets, gross amounts ₨ 190,537.6 $ 2,527.4 ₨ 132,524.1
Derivative assets, amounts offset 0.0   0.0
Derivative assets, net amounts reported in the balance sheet 190,537.6   132,524.1
Derivative assets, financial instruments 147,844.5   104,025.7
Derivative assets, financial collateral [1] 8,326.7   2,651.7
Derivative assets, net amount 34,366.4 455.8 25,846.7
Securities purchased under agreements to resell, gross amounts 250,000.0 3,316.1 76,213.5
Securities purchased under agreements to resell, amounts offset 0.0   0.0
Securities purchased under agreements to resell, net amounts reported in the balance sheet 250,000.0   76,213.5
Securities purchased under agreements to resell, financial instruments 0.0   0.0
Securities purchased under agreements to resell, financial collateral [1] 250,000.0   76,213.5
Securities purchased under agreements to resell, net amount 0.0 0.0 0.0
Derivative liabilities, gross amounts 184,783.0 2,451.0 128,449.0
Derivative liabilities, amounts offset 0.0   0.0
Derivative liabilities, net amounts reported in the balance sheet 184,783.0   128,449.0
Derivative liabilities, financial instruments 147,844.5   104,025.7
Derivative liabilities, financial collateral [1] 6,706.7   3,098.1
Derivative liabilities, net amount 30,231.8 401.0 21,325.2
Securities sold under repurchase agreements, gross amounts 507,982.0 6,738.1 174,000.0
Securities sold under repurchase agreements, amounts offset 0.0   0.0
Securities sold under repurchase agreements, net amounts reported in the balance sheet 507,982.0   174,000.0
Securities sold under repurchase agreements, financial instruments 0.0   0.0
Securities sold under repurchase agreements, financial collateral [1] 507,982.0   174,000.0
Securities sold under repurchase agreements, net amount 0.0 0.0 ₨ 0.0
Long Term debt , gross amounts 17,260.0    
Long Term debt , Amounts offset 0.0    
Long Term debt ,Net amounts reported in the balance sheet 17,260.0    
Long Term debt , Financial instruments 0.0    
Long Term debt , Financial collateral [1] 17,260.0    
Long Term debt , Net amount ₨ 0.0 $ 0.0  
[1] Comprised of securities and cash collaterals. These amounts are limited to the asset/liability balance, and accordingly, do not include excess collateral received/pledged.