The profit or loss for the period under Indian GAAP, net of income taxes.

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Percentage of after tax Indian GAAP profit required transfer to a non-distributable statutory reserve for payment of dividends without prior RBI approval.

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Maximum amount of Dividend payout as a percentage of net income under Indian GAAP.

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No definition available.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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No definition available.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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Face amount or stated value per share of common stock.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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The per share amount of a dividend declared, but not paid, as of the financial reporting date.

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Disclosure of statutory restrictions on the payment of dividends as prescribed by the National Association of Insurance Commissioners or state regulatory authorities, amounts not available for future dividend payments, and amount of dividends paid.

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Earnings Per Equity Share - Additional Information (Detail) - INR (₨) ₨ / shares in Units, ₨ in Millions		12 Months Ended
	Aug. 02, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 20, 2019	Sep. 19, 2019	Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Equity shares, issued		5,483,286,460	5,446,613,220	5,470,763,894
Equity shares, par value		₨ 1.0	₨ 1.0	₨ 1.0	₨ 2.0
Required transfer of after tax Indian GAAP profit to a non-distributable statutory reserve in order to pay dividends without prior RBI approval		25.00%
Net income calculated under Indian GAAP		₨ 262,573.2
Dividends declared			₨ 7.5			₨ 6.5
Special Interim Dividend
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common Stock, Dividends, Per Share, Cash Paid	₨ 2.5
Maximum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Equity shares, par value				₨ 2.0
Employees Stock Option Scheme
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Potential equity shares excluded from the calculation of diluted earnings per share, average outstanding balance		24,200,000	0
Indian GAAP [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dividend payout, description of restrictions		As per the RBI guidelines, the dividend payout (excluding dividend tax) for March 31, 2020 cannot exceed 35% of net income of Rs. 262,573.2 million as calculated under Indian GAAP.
Indian GAAP [Member] \| Maximum
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dividend payout, maximum pay out as a percentage of net income calculated under Indian GAAP		35.00%