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Accumulated other comprehensive income (Tables) | 12 Months Ended
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Mar. 31, 2017
Changes in Accumulated Other Comprehensive Income After Tax | The below table presents the changes in accumulated other comprehensive income (OCI) after tax for the years ended March 31, 2016 and March 31, 2017.
|  | Available for sale securities |  |  | Foreign currency translation reserve |  |  | Total |
|  | (In millions) |
Balance, March 31, 2015 |  | Rs. | 10,259.0 |  |  | Rs. | 567.4 |  |  | Rs. | 10,826.4 |
Net unrealized gain/(loss) arising during the period |  |  | 4,562.9 |  |  |  | 240.3 |  |  |  | 4,803.2 |
Amounts reclassified to income |  |  | (4,114.3 | ) |  |  | — |  |  |  | (4,114.3 | )
Balance, March 31, 2016 |  | Rs. | 10,707.6 |  |  | Rs. | 807.7 |  |  | Rs. | 11,515.3 |
Balance, March 31, 2016 |  | Rs. | 10,707.6 |  |  | Rs. | 807.7 |  |  | Rs. | 11,515.3 |
Net unrealized gain/(loss) arising during the period |  |  | 17,910.7 |  |  |  | (209.2 | ) |  |  | 17,701.5 |
Amounts reclassified to income |  |  | (3,185.2 | ) |  |  | — |  |  |  | (3,185.2 | )
Balance, March 31, 2017 |  | Rs. | 25,433.1 |  |  | Rs. | 598.5 |  |  | Rs. | 26,031.6 |
Balance, March 31, 2017 |  | US$ | 392.2 |  |  | US$ | 9.2 |  |  | US$ | 401.4 |
Reclassification Out of Accumulated Other Comprehensive Income (OCI) by Income line Item and the Related Tax Effect | The below table presents the reclassification out of accumulated other comprehensive income (OCI) by income line item and the related tax effect for period ended March 31, 2016 and March 31, 2017.
|  | As of March 31, |
|  | 2016 |  |  | 2017 |  |  | 2017 |
|  | (In millions) |
Available for sale securities: |  |  |  |  |  |  |  |  |  |  |  |
Realized (gain)/loss on sales of available for sale securities, net |  | Rs. | (6,346.6 | ) |  | Rs. | (4,884.3 | ) |  |  | US$ (75.3 | )
Other than temporary impairment losses on available for sale securities |  |  | 54.9 |  |  |  | 13.4 |  |  |  | 0.2 |
Total before tax |  | Rs. | (6,291.7 | ) |  | Rs. | (4,870.9 | ) |  |  | US$ (75.1 | )
Income tax |  |  | 2,177.4 |  |  |  | 1,685.7 |  |  |  | 26.0 |
Net of tax |  | Rs. | (4,114.3 | ) |  | Rs. | (3,185.2 | ) |  |  | US$ (49.1 | )

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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