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Additional Capital Disclosures - Summary of Capital Structure (Detail) ₨ in Millions, $ in Millions | Mar. 31, 2019 INR (₨) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 INR (₨)
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Capital structure [abstract] |  |  |
Equity attributable to the equity shareholders of the Company | ₨ 568,116 | $ 8,214 | ₨ 482,936
As percentage of total capital | 85.00% | 85.00% | 78.00%
Current loans, borrowings and bank overdrafts | ₨ 71,099 | $ 1,028 | ₨ 92,991
Long-term loans and borrowings | 28,368 | $ 410 | 45,268
Total loans, borrowings and bank overdrafts | ₨ 99,467 |  | ₨ 138,259
As percentage of total capital | 15.00% | 15.00% | 22.00%
Total capital (loans, borrowings and bank overdrafts and equity) | ₨ 667,583 |  | ₨ 621,195
Percentage of change, Equity attributable to the equity shareholders of the Company | 17.64% | 17.64% |
Percentage of change, Total loans and borrowings | (28.06%) | (28.06%) |
Percentage of change, Total capital (loans and borrowings and equity) | 7.47% | 7.47% |

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