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.

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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, 2019 INR (₨)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 INR (₨)	Mar. 31, 2017 INR (₨)
Disclosure of geographical areas [line items]
Total	₨ 585,845	$ 8,471	₨ 544,871	₨ 550,402
Operating Segments [member]
Disclosure of geographical areas [line items]
Total	589,060		546,359	554,179
Operating Segments [member] \| India [member]
Disclosure of geographical areas [line items]
Total	30,999		43,099	46,555
Operating Segments [member] \| Americas [member]
Disclosure of geographical areas [line items]
Total	325,432		283,515	290,719
Operating Segments [member] \| Europe [member]
Disclosure of geographical areas [line items]
Total	147,074		138,597	133,909
Operating Segments [member] \| Rest of the World [member]
Disclosure of geographical areas [line items]
Total	₨ 85,555		₨ 81,148	₨ 82,996