Aggregate Notional Principal Amounts of Bank's Outstanding Forward Exchange and Derivative Contracts (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2022 INR (₨)	Mar. 31, 2022 USD ($)	Mar. 31, 2021 INR (₨)
Derivatives, Fair Value [Line Items]
Notional	₨ 12,488,223.5	$ 164,600.4	₨ 8,580,508.8
Gross Assets	80,202.3	1,057.1	84,406.7
Gross Liabilities	74,819.2	986.1	81,880.0
Net Fair Value	5,383.1	71.0	2,526.7
Interest rate derivatives
Derivatives, Fair Value [Line Items]
Notional	5,142,612.3	67,781.9	3,155,410.2
Gross Assets	28,564.1		32,217.2
Gross Liabilities	27,644.4		33,894.0
Net Fair Value	919.7	12.1	(1,676.8)
Forward rate agreements
Derivatives, Fair Value [Line Items]
Notional	50,610.7	667.1	20,887.8
Gross Assets	1,574.1		270.0
Gross Liabilities	14.8		64.1
Net Fair Value	1,559.3	20.6	205.9
Currency options
Derivatives, Fair Value [Line Items]
Notional	434,371.3	5,725.2	202,402.7
Gross Assets	1,845.1		1,078.7
Gross Liabilities	2,439.5		1,510.7
Net Fair Value	(594.4)	(7.8)	(432.0)
Currency swaps
Derivatives, Fair Value [Line Items]
Notional	308,757.4	4,069.6	237,081.5
Gross Assets	10,463.6		8,126.4
Gross Liabilities	4,312.3		4,940.8
Net Fair Value	6,151.3	81.1	3,185.6
Forward exchange contracts
Derivatives, Fair Value [Line Items]
Notional	6,551,871.8	86,356.6	4,964,726.6
Gross Assets	37,755.4		42,714.4
Gross Liabilities	40,408.2		41,470.4
Net Fair Value	₨ (2,652.8)	$ (35.0)	₨ 1,244.0

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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