Aggregate nominal value of common shares reserved for future issuance

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Period from date of vesting that an equity-based award expires

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Grant Date, Intrinsic Value

+ References

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Grant Date, Aggregate Intrinsic Value

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Aggregate Intrinsic Value

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Grant Date, Aggregate Intrinsic Value

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Grant Date, Intrinsic Value

+ References

No definition available.

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- Definition

Aggregate number of common shares reserved for future issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

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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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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Net number of share options (or share units) granted during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

Number of non-vested options outstanding.

+ References

No definition available.

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Stock-Based Compensation - Additional Information (Detail) ₨ / shares in Units, ₨ in Millions, $ in Millions		1 Months Ended		12 Months Ended
	Jul. 26, 2014 shares	Dec. 24, 2013 shares	Jul. 20, 2013 shares	Mar. 31, 2015 INR (₨) ₨ / shares shares	Mar. 31, 2015 USD ($) shares	Mar. 31, 2014 INR (₨) ₨ / shares shares	Jun. 27, 2013 INR (₨) shares	Mar. 31, 2013 INR (₨) ₨ / shares shares	Jun. 30, 2010 INR (₨) shares	Jun. 30, 2007 INR (₨) shares	Jun. 30, 2005 INR (₨) shares	Jun. 30, 2003 INR (₨) shares	Jan. 31, 2000 INR (₨) shares	Mar. 31, 2012 ₨ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, intrinsic value of options exercised at grant date				₨ 122.1		₨ 129.7		₨ 151.5
Stock-based compensation, aggregate intrinsic value of options exercised at exercise date				9,662.4		5,359.2		9,152.2
Stock-based compensation, aggregate intrinsic value of options outstanding at grant date				236.5		359.2
Stock-based compensation, aggregate intrinsic value of options outstanding				37,020.7		17,823.9
Stock-based compensation, aggregate intrinsic value of options exercisable at grant date				236.5		359.2
Stock-based compensation, aggregate intrinsic value of options exercisable				20,295.7		14,635.3
Stock-based compensation, total stock compensation cost recognized under the plans				₨ 9,138.8	$ 146.7	₨ 5,495.5		₨ 4,533.7
Stock-based compensation, unvested options, outstanding \| shares				46,339,000		67,161,600
Stock-based compensation, unvested options, weighted average exercise price \| ₨ / shares				₨ 773.7		₨ 680.0
Stock-based compensation, unvested options, aggregate intrinsic value at grant date				₨ 0.0		₨ 0.0
Stock-based compensation, unvested options, aggregate intrinsic value as at end of period				16,725.1		3,188.6
Stock-based compensation, total estimated compensation cost to be recognized in future periods				₨ 8,515.3		₨ 6,299.7
Employees Stock Option Scheme
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares				41,659,000	41,659,000	47,060,000		0
Stock-based compensation, unvested options, weighted average exercise price \| ₨ / shares				₨ 683.16		₨ 556.06		₨ 417.32						₨ 389.52
Stock-based compensation, weighted average period of recognition of total compensation cost not yet recognized (in years)				8 months 12 days	8 months 12 days
Employees Stock Option Scheme \| Plan ''A''
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, equity shares reserved for issuance \| shares													50,000,000
Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved													₨ 100.0
Employees Stock Option Scheme \| Plan ''B''
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, equity shares reserved for issuance \| shares												50,000,000
Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved												₨ 100.0
Employees Stock Option Scheme \| Plan ''C''
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, equity shares reserved for issuance \| shares											50,000,000
Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved											₨ 100.0
Stock-based compensation, unvested options, weighted average exercise price \| ₨ / shares				₨ 692.50
Employees Stock Option Scheme \| Plan ''D''
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, equity shares reserved for issuance \| shares										75,000,000
Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved										₨ 150.0
Stock-based compensation, unvested options, weighted average exercise price \| ₨ / shares				680.00
Employees Stock Option Scheme \| Plan "E"
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, equity shares reserved for issuance \| shares									100,000,000
Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved									₨ 200.0
Stock-based compensation, unvested options, weighted average exercise price \| ₨ / shares				573.70
Employees Stock Option Scheme \| Plan "F"
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, equity shares reserved for issuance \| shares							100,000,000
Employees' Stock Option Scheme, aggregate nominal value of equity shares reserved							₨ 200.0
Stock-based compensation, unvested options, weighted average exercise price \| ₨ / shares				₨ 835.50
Employees Stock Option Scheme \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, expiration				5 years	5 years
Employees' Stock Option Scheme, general discretionary vesting period				3 years	3 years
Employees Stock Option Scheme \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employees' Stock Option Scheme, general discretionary vesting period				1 year	1 year
Scheme XXIII
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares	574,000
Scheme XXIV
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares	41,085,000
Scheme XIX
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares			32,926,500
Scheme XX
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares			7,085,000
Scheme XXI
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares			7,017,000
Scheme XXII
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation, options granted \| shares		31,500