Interest on Loans by Facility (Detail) ₨ in Millions, $ in Millions	12 Months Ended
Mar. 31, 2017 INR (₨)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 INR (₨)	Mar. 31, 2015 INR (₨)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	₨ 552,686.8	$ 8,522.5	₨ 470,818.5	₨ 388,264.7
Wholesale loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	134,543.1	2,074.7	116,589.2	105,465.8
Retail Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest on loans	₨ 418,143.7	$ 6,447.8	₨ 354,229.3	₨ 282,798.9

The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.1)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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