Assumptions used in Accounting for Gratuity (Parenthetical) (Detail)	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011 Maximum	Mar. 31, 2011 Minimum
Defined Benefit Plan Disclosure [Line Items]
Rate of increase in compensation	7.00%	7.00%	10.00%	7.00%

Expected rate of compensation increases (for pay-related plans).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (k)(2)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

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Balance Type:	na
Period Type:	duration