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Goodwill and other intangible assets | 12 Months Ended
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Mar. 31, 2016
Goodwill and other intangible assets | 14. Goodwill and other intangible assets Goodwill arising from a business combination is tested at least on an annual basis for impairment. There were no changes in the carrying amount of goodwill of Rs. 74,937.9 million (US$ 1,131.1 million) for the year ended March 31, 2015 and the year ended March 31, 2016. The entire amount of goodwill was allocated to the retail business. The table below presents the gross carrying amount, accumulated amortization and net carrying amount, in total and by class of intangible assets as of March 31, 2015 and March 31, 2016:
|  | As of March 31, 2015 |  |  | As of March 31, 2016 |
|  | Gross carrying amount |  |  | Accumulated amortization |  |  | Net carrying amount |  |  | Gross carrying amount |  |  | Accumulated amortization |  |  | Net carrying amount |  |  | Net carrying amount |
|  |  |  |  |  |  |  |  |  |  | (In millions) |  |  |  |  |  |  |  |  |  |
Branch network |  | Rs. | 8,335.0 |  |  | Rs. | 8,335.0 |  |  | Rs. | — |  |  | Rs. | 8,335.0 |  |  | Rs. | 8,335.0 |  |  | Rs. | — |  |  | US$ | — |
Customer list |  |  | 2,710.0 |  |  |  | 2,710.0 |  |  |  | — |  |  |  | 2,710.0 |  |  |  | 2,710.0 |  |  |  | — |  |  |  | — |
Core deposit |  |  | 4,414.0 |  |  |  | 4,414.0 |  |  |  | — |  |  |  | 4,414.0 |  |  |  | 4,414.0 |  |  |  | — |  |  |  | — |
Favorable leases |  |  | 543.0 |  |  |  | 531.0 |  |  |  | 12.0 |  |  |  | 543.0 |  |  |  | 538.0 |  |  |  | 5.0 |  |  |  | 0.1 |
Total |  | Rs. | 16,002.0 |  |  | Rs. | 15,990.0 |  |  | Rs. | 12.0 |  |  | Rs. | 16,002.0 |  |  | Rs. | 15,997.0 |  |  | Rs. | 5.0 |  |  | US$ | 0.1 |
Branch network intangible represents the benefit that the Bank received through the acquisition of a ready branch network from Centurion Bank of Punjab Limited (“CBoP”) as opposed to having to build a new one. The fair value attributable to the branch network intangible is the difference in the present values of the earnings (net of costs) that the Bank would have generated if the Bank had set up its own branches/ATMs (the “Hypothetical New Branch Network Earnings”) and the earnings (net of costs) that were generated because of the acquisition of CBoP (the “CBoP Branch Network Earnings”). Similar streams of revenues and operating costs (and therefore profits) from CBoP’s existing customer base and loan portfolio (includes net interest income, fees and commission) have been considered in determining the values of the Hypothetical New Branch Network Earnings and the CBoP Branch Network Earnings. Other assets including intangibles such as customer list, core deposits, loans, premises and equipment have been considered as assets of Hypothetical New Branch Network Earnings and the CBoP Branch Network Earnings and the value of these assets have been included in both of the networks. The aforesaid present values to compute the said intangible assets was intended to capture the advantages that the Bank received through the acquisition of a ready branch network from CBoP (as opposed to having to build a new one) in terms of time and of avoiding the administrative process required to obtaining branch licenses from the Reserve Bank of India (RBI). The Bank calculated the value of the customer list intangible through the cost approach by considering the estimated direct unit costs to source these customers multiplied by the number of customers. The Bank used the cost savings approach, i.e. the difference between the estimated cost of funds on deposit (interest cost and net maintenance costs) and the estimated cost of an equal amount of funds from an alternative source to calculate the core deposit intangible. The valuation of favorable leases intangibles was based on the cost saving to the Bank and future economic benefit until the lease expiry. The aggregate amortization charged for the years ended March 31, 2014, March 31, 2015 and March 31, 2016 was Rs. 1,538.5 million, Rs. 219.0 million and Rs. 7.0 million (US$ 0.1 million), respectively. The estimated amortization expense for intangible assets for each of the five succeeding twelve months period is given in the table below:
|  | As of March 31, |
|  | 2016 |  |  | 2016 |
|  | (In millions) |
To be amortized during the twelve months ending March 31: |  |  |  |  |  |  |  |
2017 |  | Rs. | 3.0 |  |  | US$ | — |
2018 |  |  | 1.0 |  |  |  | — |
2019 |  |  | 1.0 |  |  |  | — |
2020 |  |  | — |  |  |  | — |
2021 |  |  | — |  |  |  | — |

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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