XML 43 R33.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Intangible Assets and Goodwill (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible assets | Intangible assets, net of accumulated amortization, impairment charges and adjustments, are summarized as follows:
|  |  | As of September 30, 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 |  |  | $ | (499.9 | ) |  | $ | 43.4 |  |  | $ | 543.3 |  |  | $ | (481.7 | ) |  | $ | 61.6 |
Developed technology | 15-23 years |  | 3,005.3 |  |  | (2,523.8 | ) |  | 481.5 |  |  | 3,005.3 |  |  | (2,396.8 | ) |  | 608.5 |
In-process research and development | Indefinite until commercialization |  | 735.6 |  |  | — |  |  | 735.6 |  |  | 314.1 |  |  | — |  |  | 314.1 |
Trademarks and tradenames | Indefinite |  | 64.0 |  |  | — |  |  | 64.0 |  |  | 64.0 |  |  | — |  |  | 64.0 |
Acquired and in-licensed rights and patents | 3-17 years |  | 3,297.6 |  |  | (440.9 | ) |  | 2,856.7 |  |  | 3,280.4 |  |  | (300.1 | ) |  | 2,980.3 |
Total intangible assets |  |  | $ | 7,645.8 |  |  | $ | (3,464.6 | ) |  | $ | 4,181.2 |  |  | $ | 7,207.1 |  |  | $ | (3,178.6 | ) |  | $ | 4,028.5 |
Estimated future amortization for acquired intangible assets | Based upon this analysis, there was not a significant change in our expected rate of amortization for acquired intangible assets and the estimated future amortization is expected to be as follows:
(In millions) | As of September 30, 2015
2015 (remaining three months) | $ | 94.3 |
2016 | 348.8 |
2017 | 318.6 |
2018 | 291.0 |
2019 | 275.1 |
2020 | 269.1 |
Total | $ | 1,596.9 |
Summary of roll forward of the changes in goodwill | The following table provides a roll forward of the changes in our goodwill balance:
(In millions) |
Balance, as of December 31, 2014 | $ | 1,760.2 |
Increase to goodwill | 649.4 |
Other | (0.7 | )
Balance, as of September 30, 2015 | $ | 2,408.9 |

X
- Definition Intangible assets excluding goodwill. + References No definition available. + Details
Name: | biib_IntangibleAssetsExcludingGoodwillTableTextBlock
Namespace Prefix: | biib_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: 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 2: 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
Name: | us-gaap_ScheduleOfGoodwillTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration