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Depreciation Rate Over Estimated Useful Lives of Fixed Assets on Straight-Line Basis (Detail)	12 Months Ended
	Mar. 31, 2017
Premises
Property, Plant and Equipment [Line Items]
Rate of depreciation	1.63%
Software and systems
Property, Plant and Equipment [Line Items]
Rate of depreciation	20.00%
Equipment and furniture | Minimum
Property, Plant and Equipment [Line Items]
Rate of depreciation	10.00%
Equipment and furniture | Maximum
Property, Plant and Equipment [Line Items]
Rate of depreciation	33.33%

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- Definition

Depreciation Rate

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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