2.2.0.7trueProperty, Plant and Equipment (Details) (USD $)0609 - Disclosure - Property, Plant and Equipment (Details)truefalsefalsefalse1USDfalsefalseUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0$false2USDfalsefalseUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170PureStandardhttp://www.xbrl.org/2003/instancepurexbrli0$false3USDtruefalsefalsefalsebiib_SanDiegoFacilityMemberbiib_FacilityLocationAxisxbrldihttp://xbrl.org/2006/xbrldibiib_SanDiegoFacilityMemberbiib_FacilityLocationAxisexplicitMemberUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$false4USDtruefalsefalsefalsebiib_SanDiegoFacilityMemberbiib_FacilityLocationAxisxbrldihttp://xbrl.org/2006/xbrldibiib_SanDiegoFacilityMemberbiib_FacilityLocationAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$53us-gaap_PropertyPlantAndEquipmentNetAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsetruefalsefalsefalsefalsefalseverboselabelfalse1falsefalsefalsefalse00falsefalsefalse2falsefalsefalsefalse00falsefalsefalse3falsefalsefalsefalse00truefalsefalse4falsefalsefalsefalse00truefalsefalsexbrli:stringItemTypestringNo definition available.false64us-gaap_PropertyPlantAndEquipmentNetus-gaaptruedebitinstantNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabelfalse1truetruefalsefalse16417910001641791000falsefalsefalse2truetruefalsefalse16370830001637083000falsefalsefalse3falsefalsefalsefalse00truefalsefalse4truetruefalsefalse128400000128400000truefalsefalsexbrli:monetaryItemTypemonetaryTangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, and production equipment.Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 13
-Subparagraph a
-Article 5
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 12
-Paragraph 5
-Subparagraph b, c
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
-Paragraph 8
-Article 7
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-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 98
-Section Appendix A
-Paragraph 28, 29
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-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 5
Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 5
-Subparagraph c
Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 14
-Article 5
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