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Inventories - Schedule of Inventories (Detail) ₨ in Millions, $ in Millions	Mar. 31, 2019 INR (₨)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 INR (₨)
Classes of current inventories [abstract]
Stores and spare parts	₨ 677		₨ 769
Finished goods and traded goods	3,274		2,601
Inventories	₨ 3,951	$ 57	₨ 3,370

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A classification of current inventory representing the amount of goods that have completed the production process and are held for sale in the ordinary course of business. [Refer: Inventories]

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The amount of current inventories. [Refer: Inventories]

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A classification of current inventory representing the amount of interchangeable parts that are kept in an inventory and are used for the repair or replacement of failed parts. [Refer: Inventories]

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