Number of options outstanding, including both vested and non-vested options.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Stock Options Outstanding, Employees Stock Option Schemes (Detail) - Employees Stock Option Scheme	12 Months Ended
	Mar. 31, 2022 ₨ / shares shares	Mar. 31, 2022 $ / shares ₨ / shares shares	Mar. 31, 2021 ₨ / shares shares	Mar. 31, 2020 ₨ / shares shares	Mar. 31, 2019 ₨ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number Of Shares Arising Out Of Options \| shares	158,106,016	158,106,016	168,168,760	142,865,602	136,612,822
Weighted Average Exercise Price \| ₨ / shares	₨ 1,175.65	₨ 1,175.65	₨ 1,063.79	₨ 899.03	₨ 682.99
Plan "F"
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of exercise price, Lower Range \| (per share)	417.75	₨ 5.51
Range of exercise price, Upper Range \| (per share)	₨ 731.08	₨ 9.64
Number Of Shares Arising Out Of Options \| shares	17,564,766	17,564,766
Weighted Average Remaining Life	1 year 25 days	1 year 25 days
Weighted Average Exercise Price \| ₨ / shares	₨ 666.77	₨ 666.77
Plan "G"
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Range of exercise price, Lower Range \| (per share)	882.85	₨ 11.64
Range of exercise price, Upper Range \| (per share)	₨ 1,516.95	₨ 19.99
Number Of Shares Arising Out Of Options \| shares	140,541,250	140,541,250
Weighted Average Remaining Life	2 years 8 months 12 days	2 years 8 months 12 days
Weighted Average Exercise Price \| ₨ / shares	₨ 1,239.25	₨ 1,239.25