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Goodwill and Intangible Assets - Summary of Movement in Goodwill Balance (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2019 INR (₨)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 INR (₨)
Reconciliation of changes in goodwill [abstract]
Balance at the beginning of the year	₨ 117,584		₨ 125,796
Translation adjustment	4,529		2,970
Disposal (Refer Note 22)	(4,893)
Acquisition through business combination			1,172
Assets reclassified as held for sale	(240)		(12,354)
Balance at the end of the year	₨ 116,980	$ 1,691	₨ 117,584

X

- Definition

The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]]

+ References

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- Definition

The decrease in goodwill due to classification as held for sale. [Refer: Goodwill; Disposal groups classified as held for sale [member]]

+ References

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- Definition

The decrease in intangible assets and goodwill resulting from disposals. [Refer: Intangible assets and goodwill]

+ References

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- Definition

The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

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- Definition

The increase (decrease) in goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Goodwill]

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