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Intangible Assets and Goodwill | 12 Months Ended
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Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets and Goodwill | Intangible Assets and Goodwill Intangible Assets Intangible assets, net of accumulated amortization, impairment charges and adjustments, are summarized as follows:
|  |  | As of December 31, 2015 |  | As of December 31, 2014
(In millions) | Estimated Life |  | Cost |  | Accumulated Amortization |  | Net |  | Cost |  | Accumulated Amortization |  | Net
Out-licensed patents | 13-23 years |  | $ | 543.3 |  |  | $ | (506.0 | ) |  | $ | 37.3 |  |  | $ | 543.3 |  |  | $ | (481.7 | ) |  | $ | 61.6 |
Developed technology | 15-23 years |  | 3,005.3 |  |  | (2,552.9 | ) |  | 452.4 |  |  | 3,005.3 |  |  | (2,396.8 | ) |  | 608.5 |
In-process research and development | Indefinite until commercialization |  | 730.5 |  |  | — |  |  | 730.5 |  |  | 314.1 |  |  | — |  |  | 314.1 |
Trademarks and tradenames | Indefinite |  | 64.0 |  |  | — |  |  | 64.0 |  |  | 64.0 |  |  | — |  |  | 64.0 |
Acquired and in-licensed rights and patents | 6-18 years |  | 3,303.2 |  |  | (502.3 | ) |  | 2,800.9 |  |  | 3,280.4 |  |  | (300.1 | ) |  | 2,980.3 |
Total intangible assets |  |  | $ | 7,646.3 |  |  | $ | (3,561.2 | ) |  | $ | 4,085.1 |  |  | $ | 7,207.1 |  |  | $ | (3,178.6 | ) |  | $ | 4,028.5 |
Amortization of acquired intangible assets totaled $382.6 million, $489.8 million, and $342.9 million for the years ended December 31, 2015, 2014 and 2013, respectively. Amortization of acquired intangible assets during 2014 included total impairment charges of $34.7 million related to one of our out-licensed patents and $16.2 million related to one of our IPR&D intangible assets. Out-licensed Patents Out-licensed patents to third-parties primarily relate to patents acquired in connection with the merger of Biogen, Inc. and IDEC Pharmaceuticals Corporation in 2003. During 2014, we recorded a charge of $34.7 million related to the impairment of one of our out-licensed patents to reflect a change in its estimated fair value, due to a change in the underlying competitive market for that product. The charge was included in amortization of acquired intangible assets. The fair value of the intangible asset was based on a discounted cash flow calculated using Level 3 fair value measurements and inputs including estimated revenues. There were no impairment charges related to our out-licensed patents during 2015. Developed Technology Developed technology primarily relates to our AVONEX product, which was recorded in connection with the merger of Biogen, Inc. and IDEC Pharmaceuticals Corporation in 2003. The net book value of this asset as of December 31, 2015, was $443.9 million. IPR&D IPR&D represents the fair value assigned to research and development assets that we acquire that have not reached technological feasibility at the date of acquisition. Upon commercialization, we determine the estimated useful life. In connection with our acquisition of Convergence in February 2015, we acquired IPR&D programs with an estimated fair value of $424.6 million. This amount has and will be adjusted for foreign exchange rate fluctuations. For a more detailed description of this transaction, please read Note 2, Acquisitions to these consolidated financial statements. An analysis of anticipated lifetime revenues and anticipated development costs is performed annually during our long- range planning cycle, which was updated in the third quarter of 2015. This analysis is based upon certain assumptions that we evaluate on a periodic basis, including anticipated future product sales, the expected impact of changes in the amount of development costs and the probabilities of our programs succeeding, the introduction of new products by our competitors and changes in our commercial and pipeline product candidates. During the third quarter of 2014, we updated the probabilities of success related to the early stage programs acquired through our recent acquisitions. The change in probability of success, combined with a delay in one of the projects, resulted in an impairment loss of $16.2 million in one of our IPR&D assets during 2014. Acquired and In-licensed Rights and Patents Acquired and in-licensed rights and patents primarily relate to our acquisition of all remaining rights to TYSABRI from Elan. The net book value of this asset as of December 31, 2015 was $2,742.9 million. For a more detailed description of this transaction, please read Note 2, Acquisitions to these consolidated financial statements. Estimated Future Amortization of Intangible Assets Our amortization expense is based on the economic consumption of intangible assets. Our most significant intangible assets are related to our AVONEX and TYSABRI products. Annually, during our long-range planning cycle, we perform an analysis of anticipated lifetime revenues of AVONEX and TYSABRI. This analysis is also updated whenever events or changes in circumstances would significantly affect the anticipated lifetime revenues of either product. Our most recent long range planning cycle was completed in the third quarter of 2015. Based upon this analysis, the estimated future amortization of acquired intangible assets is expected to be as follows:
(In millions) | As of December 31, 2015
2016 | $ | 346.4 |
2017 | 318.6 |
2018 | 291.0 |
2019 | 275.1 |
2020 | 269.1 |
Total | $ | 1,500.2 |
Goodwill The following table provides a roll forward of the changes in our goodwill balance:
| As of December 31,
(In millions) | 2015 |  | 2014
Goodwill, beginning of year | $ | 1,760.2 |  |  | $ | 1,232.9 |
Increase to goodwill | 908.1 |  |  | 527.3 |
Other | (4.5 | ) |  | — |
Goodwill, end of year | $ | 2,663.8 |  |  | $ | 1,760.2 |
The increase in goodwill during 2015 was related to $900.0 million in contingent milestones achieved (exclusive of $120.2 million in tax benefits) and payable to the former shareholders of Fumapharm AG or holders of their rights and $128.3 million related to our acquisition of Convergence. Other includes changes related to foreign exchange rate fluctuations. The increase in goodwill during 2014 was related to $600.0 million in contingent milestones achieved (exclusive of $72.7 million in tax benefits) and payable to the former shareholders of Fumapharm AG or holders of their rights. For additional information related to future contingent payments to the former shareholders of Fumapharm AG, please read Note 21, Commitments and Contingencies to these consolidated financial statements. For additional information related to our acquisition of Convergence, please read Note 2, Acquisitions to these consolidated financial statements. As of December 31, 2015, we had no accumulated impairment losses related to goodwill.

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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=26713463&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=26713463&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=26713463&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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