Intangible Assets and Goodwill	9 Months Ended
Intangible Assets and Goodwill	Sep. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets and Goodwill	Intangible Assets and Goodwill Intangible Assets As of September 30, 2014, the Company had no intangible assets recorded on its condensed consolidated balance sheet. The intangible assets that were previously reflected on the Company's condensed consolidated balance sheets related to drug candidates for the treatment of HCV infection. The field of HCV infection treatment is highly competitive and characterized by rapid technological advances and the development of drug candidates for the treatment of HCV infection is subject to numerous risks. ViroChem Acquisition The Company determined that the fair value of the VX-222 intangible asset acquired from ViroChem was zero as of March 31, 2013. Accordingly, the Company recorded a $412.9 million impairment charge in the three months ended March 31, 2013 and the nine months ended September 30, 2013. In connection with this impairment charge, the Company recorded a credit of $127.6 million in its provision for income taxes. In the nine months ended September 30, 2013, the increase to the Company's net loss attributable to Vertex related to this impairment charge, net of the tax credit, was $285.3 million, and the net increase to the Company's net loss per share attributable to Vertex common shareholders was $1.28 per share. Alios Collaboration In June 2011, the Company recorded $250.6 million of intangible assets on its condensed consolidated balance sheet based on the Company's estimate of the fair value of Alios' HCV nucleotide analogue program, including the intellectual property related to ALS-2200 and ALS-2158. In the fourth quarter of 2013, the Company determined that the fair value of the HCV nucleotide analogue program was zero as of December 31, 2013. Accordingly, in the fourth quarter of 2013, the Company recorded a $250.6 million impairment charge and a $102.1 million benefit from income taxes. Goodwill As of September 30, 2014 and December 31, 2013, goodwill of $31.0 million was recorded on the Company's condensed consolidated balance sheets. There was no change to goodwill recorded during the three and nine months ended September 30, 2014 or 2013.

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.

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