Expiry date 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants. Effective 2020-01-01: The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details

Segment Information - Summary of Revenues from Geographic Segments Based on Domicile of Customer (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2020 INR (₨)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 INR (₨)	Mar. 31, 2018 INR (₨)
Disclosure of geographical areas [line items]
Total	₨ 610,232	$ 8,094	₨ 585,845	₨ 544,871
Operating Segments [member]
Disclosure of geographical areas [line items]
Total	613,401		589,060	546,359
Operating Segments [member] \| India [member]
Disclosure of geographical areas [line items]
Total	30,158		30,999	43,099
Operating Segments [member] \| Americas [member]
Disclosure of geographical areas [line items]
Total	352,319		325,432	283,515
Operating Segments [member] \| Europe [member]
Disclosure of geographical areas [line items]
Total	144,876		147,074	138,597
Operating Segments [member] \| Rest of the World [member]
Disclosure of geographical areas [line items]
Total	₨ 86,048		₨ 85,555	₨ 81,148