$BIIB
BIOGEN INC.

2020 Q3 Form 10-Q Financial Statement

#000087504520000036 Filed on October 21, 2020

View on sec.gov

Income Statement

Concept 2020 Q3 2019 Q3
Revenue $3.376B $3.600B
YoY Change -6.22% 4.68%
Cost Of Revenue $449.1M $430.0M
YoY Change 4.44% -6.68%
Gross Profit $2.927B $3.170B
YoY Change -7.67% 6.44%
Gross Profit Margin 86.7% 88.06%
Selling, General & Admin $573.1M $554.5M
YoY Change 3.35% 11.41%
% of Gross Profit 19.58% 17.49%
Research & Development $1.141B $540.4M
YoY Change 111.12% 6.4%
% of Gross Profit 38.98% 17.05%
Depreciation & Amortization $51.50M $45.50M
YoY Change 13.19% -29.78%
% of Gross Profit 1.76% 1.44%
Operating Expenses $1.714B $1.095B
YoY Change 56.54% 8.88%
Operating Profit $1.086B $1.806B
YoY Change -39.85% 6.4%
Interest Expense $56.30M $45.80M
YoY Change 22.93% -6.53%
% of Operating Profit 5.18% 2.54%
Other Income/Expense, Net -$128.6M -$27.30M
YoY Change 371.06% -123.72%
Pretax Income $957.8M $1.779B
YoY Change -46.16% -1.86%
Income Tax $240.8M $211.3M
% Of Pretax Income 25.14% 11.88%
Net Earnings $701.5M $1.546B
YoY Change -54.62% 7.03%
Net Earnings / Revenue 20.78% 42.94%
Basic Earnings Per Share $4.47 $8.40
Diluted Earnings Per Share $4.46 $8.39
COMMON SHARES
Basic Shares Outstanding 156.9M shares 184.0M shares
Diluted Shares Outstanding 157.2M shares 184.2M shares

Balance Sheet

Concept 2020 Q3 2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments $3.580B $4.437B
YoY Change -19.33% 0.2%
Cash & Equivalents $2.225B $2.344B
Short-Term Investments $1.355B $2.094B
Other Short-Term Assets $683.5M $743.2M
YoY Change -8.03% -12.39%
Inventory $1.028B $751.8M
Prepaid Expenses
Receivables $2.025B $1.934B
Other Receivables $0.00 $0.00
Total Short-Term Assets $7.843B $8.448B
YoY Change -7.16% -3.11%
LONG-TERM ASSETS
Property, Plant & Equipment $3.360B $3.138B
YoY Change 7.07% -11.33%
Goodwill $5.756B $5.746B
YoY Change 0.17% 5.62%
Intangibles $3.324B $3.392B
YoY Change -2.03% 0.4%
Long-Term Investments $2.809B $3.017B
YoY Change -6.89% 34.15%
Other Assets $1.835B $1.239B
YoY Change 48.12% 22.68%
Total Long-Term Assets $17.09B $19.04B
YoY Change -10.22% 13.49%
TOTAL ASSETS
Total Short-Term Assets $7.843B $8.448B
Total Long-Term Assets $17.09B $19.04B
Total Assets $24.93B $27.48B
YoY Change -9.28% 7.81%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $398.4M $382.2M
YoY Change 4.24% 11.66%
Accrued Expenses $1.569B $1.486B
YoY Change 5.59% 2.06%
Deferred Revenue
YoY Change
Short-Term Debt $0.00 $0.00
YoY Change
Long-Term Debt Due $0.00 $1.495B
YoY Change -100.0%
Total Short-Term Liabilities $3.804B $4.432B
YoY Change -14.17% 39.6%
LONG-TERM LIABILITIES
Long-Term Debt $7.425B $4.458B
YoY Change 66.55% -24.84%
Other Long-Term Liabilities $1.428B $1.371B
YoY Change 4.17% -9.32%
Total Long-Term Liabilities $1.428B $1.371B
YoY Change 4.17% -9.32%
TOTAL LIABILITIES
Total Short-Term Liabilities $3.804B $4.432B
Total Long-Term Liabilities $1.428B $1.371B
Total Liabilities $14.19B $13.49B
YoY Change 5.17% 15.0%
SHAREHOLDERS EQUITY
Retained Earnings $13.96B $17.07B
YoY Change -18.19% 0.71%
Common Stock $100.0K $100.0K
YoY Change 0.0% 0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost) $2.977B $2.977B
YoY Change 0.0% 0.0%
Treasury Stock Shares
Shareholders Equity $10.76B $14.00B
YoY Change
Total Liabilities & Shareholders Equity $24.93B $27.48B
YoY Change -9.28% 7.81%

Cashflow Statement

Concept 2020 Q3 2019 Q3
OPERATING ACTIVITIES
Net Income $701.5M $1.546B
YoY Change -54.62% 7.03%
Depreciation, Depletion And Amortization $51.50M $45.50M
YoY Change 13.19% -29.78%
Cash From Operating Activities $1.181B $1.695B
YoY Change -30.31% -2.36%
INVESTING ACTIVITIES
Capital Expenditures -$84.10M -$90.10M
YoY Change -6.66% -52.75%
Acquisitions
YoY Change
Other Investing Activities $31.70M -$275.8M
YoY Change -111.49% -35.62%
Cash From Investing Activities -$52.40M -$365.9M
YoY Change -85.68% -40.9%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities -1.313B -689.0M
YoY Change 90.55% -2845.02%
NET CHANGE
Cash From Operating Activities 1.181B 1.695B
Cash From Investing Activities -52.40M -365.9M
Cash From Financing Activities -1.313B -689.0M
Net Change In Cash -184.2M 640.0M
YoY Change -128.78% -43.95%
FREE CASH FLOW
Cash From Operating Activities $1.181B $1.695B
Capital Expenditures -$84.10M -$90.10M
Free Cash Flow $1.265B $1.785B
YoY Change -29.12% -7.35%

Facts In Submission

Frame Concept Type Concept / XBRL Key Value Unit
dei Entity Central Index Key
EntityCentralIndexKey
0000875045
dei Current Fiscal Year End Date
CurrentFiscalYearEndDate
--12-31
dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2020
dei Document Fiscal Period Focus
DocumentFiscalPeriodFocus
Q3
dei Amendment Flag
AmendmentFlag
false
dei Entity Address Address Line1
EntityAddressAddressLine1
225 Binney Street
dei Entity Address State Or Province
EntityAddressStateOrProvince
MA
CY2020Q4 dei Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
153881597 shares
CY2020Q3 us-gaap Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
0.001
CY2019Q4 us-gaap Preferred Stock Par Or Stated Value Per Share
PreferredStockParOrStatedValuePerShare
0.001
CY2020Q3 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.0005
CY2019Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.0005
us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0 USD
us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0 USD
CY2019Q3 us-gaap Impairment Of Intangible Assets Excluding Goodwill
ImpairmentOfIntangibleAssetsExcludingGoodwill
0 USD
CY2020Q3 us-gaap Asset Impairment Charges
AssetImpairmentCharges
0 USD
CY2019Q4 biib Investment In Biotechnology Companies That Are Determined To Be Unconsolidated Variable Interest Entities
InvestmentInBiotechnologyCompaniesThatAreDeterminedToBeUnconsolidatedVariableInterestEntities
22700000 USD
dei Document Type
DocumentType
10-Q
dei Document Quarterly Report
DocumentQuarterlyReport
true
dei Document Period End Date
DocumentPeriodEndDate
2020-09-30
dei Document Transition Report
DocumentTransitionReport
false
dei Entity File Number
EntityFileNumber
0-19311
dei Entity Registrant Name
EntityRegistrantName
BIOGEN INC.
dei Entity Incorporation State Country Code
EntityIncorporationStateCountryCode
DE
dei Entity Tax Identification Number
EntityTaxIdentificationNumber
33-0112644
dei Entity Address City Or Town
EntityAddressCityOrTown
Cambridge
dei Entity Address Postal Zip Code
EntityAddressPostalZipCode
02142
dei City Area Code
CityAreaCode
617
dei Local Phone Number
LocalPhoneNumber
679-2000
dei Security12b Title
Security12bTitle
Common Stock, $0.0005 par value
dei Trading Symbol
TradingSymbol
BIIB
dei Entity Current Reporting Status
EntityCurrentReportingStatus
Yes
dei Entity Interactive Data Current
EntityInteractiveDataCurrent
Yes
dei Entity Filer Category
EntityFilerCategory
Large Accelerated Filer
dei Entity Small Business
EntitySmallBusiness
false
dei Entity Emerging Growth Company
EntityEmergingGrowthCompany
false
dei Entity Shell Company
EntityShellCompany
false
CY2020Q4 dei Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
153881597 shares
CY2020Q3 us-gaap Revenues
Revenues
3376100000 USD
CY2019Q3 us-gaap Revenues
Revenues
3600100000 USD
us-gaap Revenues
Revenues
10592000000.0 USD
us-gaap Revenues
Revenues
10706600000 USD
CY2020Q3 us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
449100000 USD
CY2019Q3 us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
430000000.0 USD
us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
1314600000 USD
us-gaap Cost Of Goods And Services Sold
CostOfGoodsAndServicesSold
1508300000 USD
CY2020Q3 us-gaap Research And Development Expense Excluding Acquired In Process Cost
ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
1140900000 USD
CY2019Q3 us-gaap Research And Development Expense Excluding Acquired In Process Cost
ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
540400000 USD
us-gaap Research And Development Expense Excluding Acquired In Process Cost
ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
2264800000 USD
us-gaap Research And Development Expense Excluding Acquired In Process Cost
ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost
1588900000 USD
CY2020Q3 us-gaap Selling General And Administrative Expense
SellingGeneralAndAdministrativeExpense
573100000 USD
CY2019Q3 us-gaap Selling General And Administrative Expense
SellingGeneralAndAdministrativeExpense
554500000 USD
us-gaap Selling General And Administrative Expense
SellingGeneralAndAdministrativeExpense
1698300000 USD
us-gaap Selling General And Administrative Expense
SellingGeneralAndAdministrativeExpense
1709800000 USD
CY2020Q3 biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
82600000 USD
CY2019Q3 biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
283900000 USD
biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
215600000 USD
biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
422200000 USD
CY2020Q3 biib Collaborationprofitlosssharing
Collaborationprofitlosssharing
73000000.0 USD
CY2019Q3 biib Collaborationprofitlosssharing
Collaborationprofitlosssharing
60200000 USD
biib Collaborationprofitlosssharing
Collaborationprofitlosssharing
166500000 USD
biib Collaborationprofitlosssharing
Collaborationprofitlosssharing
181800000 USD
CY2020Q3 us-gaap Disposal Group Not Discontinued Operation Loss Gain On Write Down
DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown
0 USD
us-gaap Disposal Group Not Discontinued Operation Loss Gain On Write Down
DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown
0 USD
us-gaap Disposal Group Not Discontinued Operation Loss Gain On Write Down
DisposalGroupNotDiscontinuedOperationLossGainOnWriteDown
95500000 USD
CY2020Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
29000000.0 USD
CY2019Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
57800000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
23500000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
66300000 USD
CY2020Q3 us-gaap Restructuring Charges
RestructuringCharges
0 USD
CY2019Q3 us-gaap Restructuring Charges
RestructuringCharges
300000 USD
us-gaap Restructuring Charges
RestructuringCharges
0 USD
us-gaap Restructuring Charges
RestructuringCharges
1500000 USD
CY2020Q3 us-gaap Research And Development In Process
ResearchAndDevelopmentInProcess
0 USD
CY2019Q3 us-gaap Research And Development In Process
ResearchAndDevelopmentInProcess
0 USD
us-gaap Research And Development In Process
ResearchAndDevelopmentInProcess
75000000.0 USD
us-gaap Research And Development In Process
ResearchAndDevelopmentInProcess
0 USD
CY2020Q3 us-gaap Costs And Expenses
CostsAndExpenses
2289700000 USD
CY2019Q3 us-gaap Costs And Expenses
CostsAndExpenses
1793800000 USD
us-gaap Costs And Expenses
CostsAndExpenses
5711300000 USD
us-gaap Costs And Expenses
CostsAndExpenses
5441700000 USD
CY2020Q3 us-gaap Operating Income Loss
OperatingIncomeLoss
1086400000 USD
CY2019Q3 us-gaap Operating Income Loss
OperatingIncomeLoss
1806300000 USD
us-gaap Operating Income Loss
OperatingIncomeLoss
4880700000 USD
us-gaap Operating Income Loss
OperatingIncomeLoss
5264900000 USD
CY2020Q3 us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-128600000 USD
CY2019Q3 us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-27300000 USD
us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-186100000 USD
us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
132600000 USD
CY2020Q3 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
957800000 USD
CY2019Q3 us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
1779000000.0 USD
us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
4694600000 USD
us-gaap Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
5397500000 USD
CY2020Q3 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
240800000 USD
CY2019Q3 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
211300000 USD
us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
979000000.0 USD
us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
881900000 USD
CY2020Q3 biib Income Loss From Equity Method Investments Net Of Tax
IncomeLossFromEquityMethodInvestmentsNetOfTax
-13100000 USD
CY2019Q3 biib Income Loss From Equity Method Investments Net Of Tax
IncomeLossFromEquityMethodInvestmentsNetOfTax
-21800000 USD
biib Income Loss From Equity Method Investments Net Of Tax
IncomeLossFromEquityMethodInvestmentsNetOfTax
-12700000 USD
biib Income Loss From Equity Method Investments Net Of Tax
IncomeLossFromEquityMethodInvestmentsNetOfTax
-66800000 USD
CY2020Q3 us-gaap Profit Loss
ProfitLoss
703900000 USD
CY2019Q3 us-gaap Profit Loss
ProfitLoss
1545900000 USD
us-gaap Profit Loss
ProfitLoss
3702900000 USD
us-gaap Profit Loss
ProfitLoss
4448800000 USD
CY2020Q3 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
2400000 USD
CY2019Q3 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
0 USD
us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
60200000 USD
us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
0 USD
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
701500000 USD
CY2019Q3 us-gaap Net Income Loss
NetIncomeLoss
1545900000 USD
us-gaap Net Income Loss
NetIncomeLoss
3642700000 USD
us-gaap Net Income Loss
NetIncomeLoss
4448800000 USD
CY2020Q3 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
4.47
CY2019Q3 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
8.40
us-gaap Earnings Per Share Basic
EarningsPerShareBasic
22.29
us-gaap Earnings Per Share Basic
EarningsPerShareBasic
23.38
CY2020Q3 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
4.46
CY2019Q3 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
8.39
us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
22.25
us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
23.35
CY2020Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
156900000 shares
CY2019Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
184000000.0 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
163400000 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
190300000 shares
CY2020Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
157200000 shares
CY2019Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
184200000 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
163700000 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
190500000 shares
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
701500000 USD
CY2019Q3 us-gaap Net Income Loss
NetIncomeLoss
1545900000 USD
us-gaap Net Income Loss
NetIncomeLoss
3642700000 USD
us-gaap Net Income Loss
NetIncomeLoss
4448800000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
100000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
100000 USD
us-gaap Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
1000000.0 USD
us-gaap Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax
OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
10300000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
-83700000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
59100000 USD
us-gaap Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
-101100000 USD
us-gaap Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax
OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax
38100000 USD
CY2020Q3 us-gaap Translation Adjustment For Net Investment Hedge Net Of Tax Period Increase Decrease
TranslationAdjustmentForNetInvestmentHedgeNetOfTaxPeriodIncreaseDecrease
-11300000 USD
CY2019Q3 us-gaap Translation Adjustment For Net Investment Hedge Net Of Tax Period Increase Decrease
TranslationAdjustmentForNetInvestmentHedgeNetOfTaxPeriodIncreaseDecrease
21200000 USD
us-gaap Translation Adjustment For Net Investment Hedge Net Of Tax Period Increase Decrease
TranslationAdjustmentForNetInvestmentHedgeNetOfTaxPeriodIncreaseDecrease
5500000 USD
us-gaap Translation Adjustment For Net Investment Hedge Net Of Tax Period Increase Decrease
TranslationAdjustmentForNetInvestmentHedgeNetOfTaxPeriodIncreaseDecrease
46900000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
500000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-800000 USD
us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-400000 USD
us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-1500000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
50900000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
79400000 USD
us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
3900000 USD
us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
51300000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
-44500000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
160600000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
-90300000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
148100000 USD
CY2020Q3 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
657000000.0 USD
CY2019Q3 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
1706500000 USD
us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
3552400000 USD
us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
4596900000 USD
CY2020Q3 us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
1500000 USD
CY2019Q3 us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
0 USD
us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
61100000 USD
us-gaap Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest
-400000 USD
CY2020Q3 us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
658500000 USD
CY2019Q3 us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
1706500000 USD
us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
3613500000 USD
us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
4596500000 USD
CY2020Q3 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
2224800000 USD
CY2019Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
2913700000 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Securities Current
AvailableForSaleSecuritiesDebtSecuritiesCurrent
1355000000.0 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Securities Current
AvailableForSaleSecuritiesDebtSecuritiesCurrent
1562200000 USD
CY2020Q3 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
2024900000 USD
CY2019Q4 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
1880500000 USD
CY2020Q3 biib Duefromanti Cd20therapeuticprograms
DuefromantiCD20therapeuticprograms
527200000 USD
CY2019Q4 biib Duefromanti Cd20therapeuticprograms
DuefromantiCD20therapeuticprograms
590200000 USD
CY2020Q3 us-gaap Inventory Net
InventoryNet
1027700000 USD
CY2019Q4 us-gaap Inventory Net
InventoryNet
804200000 USD
CY2020Q3 us-gaap Other Assets Current
OtherAssetsCurrent
683500000 USD
CY2019Q4 us-gaap Other Assets Current
OtherAssetsCurrent
631000000.0 USD
CY2020Q3 us-gaap Assets Current
AssetsCurrent
7843100000 USD
CY2019Q4 us-gaap Assets Current
AssetsCurrent
8381800000 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Securities Noncurrent
AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
1009800000 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Securities Noncurrent
AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
1408100000 USD
CY2020Q3 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
3359900000 USD
CY2019Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
3247300000 USD
CY2020Q3 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
434200000 USD
CY2019Q4 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
427000000.0 USD
CY2020Q3 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
3323600000 USD
CY2019Q4 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
3527400000 USD
CY2020Q3 us-gaap Goodwill
Goodwill
5755700000 USD
CY2019Q4 us-gaap Goodwill
Goodwill
5757800000 USD
CY2020Q3 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
1372900000 USD
CY2019Q4 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
3232100000 USD
CY2020Q3 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
1834900000 USD
CY2019Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
1252800000 USD
CY2020Q3 us-gaap Assets
Assets
24934100000 USD
CY2019Q4 us-gaap Assets
Assets
27234300000 USD
CY2020Q3 us-gaap Notes Payable Current
NotesPayableCurrent
0 USD
CY2019Q4 us-gaap Notes Payable Current
NotesPayableCurrent
1495800000 USD
CY2020Q3 us-gaap Taxes Payable Current
TaxesPayableCurrent
119400000 USD
CY2019Q4 us-gaap Taxes Payable Current
TaxesPayableCurrent
71400000 USD
CY2020Q3 us-gaap Accounts Payable Current
AccountsPayableCurrent
398400000 USD
CY2019Q4 us-gaap Accounts Payable Current
AccountsPayableCurrent
530800000 USD
CY2020Q3 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
3286200000 USD
CY2019Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
2765800000 USD
CY2020Q3 us-gaap Liabilities Current
LiabilitiesCurrent
3804000000.0 USD
CY2019Q4 us-gaap Liabilities Current
LiabilitiesCurrent
4863800000 USD
CY2020Q3 us-gaap Long Term Debt
LongTermDebt
7425000000.0 USD
CY2019Q4 us-gaap Long Term Debt
LongTermDebt
4459000000.0 USD
CY2020Q3 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
1123400000 USD
CY2019Q4 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
2810800000 USD
CY2020Q3 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
409100000 USD
CY2019Q4 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
412700000 USD
CY2020Q3 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1428100000 USD
CY2019Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1348900000 USD
CY2020Q3 us-gaap Liabilities
Liabilities
14189600000 USD
CY2019Q4 us-gaap Liabilities
Liabilities
13895200000 USD
CY2020Q3 us-gaap Commitments And Contingencies
CommitmentsAndContingencies
USD
CY2019Q4 us-gaap Commitments And Contingencies
CommitmentsAndContingencies
USD
CY2020Q3 us-gaap Preferred Stock Value
PreferredStockValue
0 USD
CY2019Q4 us-gaap Preferred Stock Value
PreferredStockValue
0 USD
CY2020Q3 us-gaap Common Stock Value
CommonStockValue
100000 USD
CY2019Q4 us-gaap Common Stock Value
CommonStockValue
100000 USD
CY2020Q3 us-gaap Additional Paid In Capital
AdditionalPaidInCapital
0 USD
CY2019Q4 us-gaap Additional Paid In Capital
AdditionalPaidInCapital
0 USD
CY2020Q3 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-225500000 USD
CY2019Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-135200000 USD
CY2020Q3 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
13961000000.0 USD
CY2019Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
16455400000 USD
CY2020Q3 us-gaap Treasury Stock Value
TreasuryStockValue
2977100000 USD
CY2019Q4 us-gaap Treasury Stock Value
TreasuryStockValue
2977100000 USD
CY2020Q3 us-gaap Stockholders Equity
StockholdersEquity
10758500000 USD
CY2019Q4 us-gaap Stockholders Equity
StockholdersEquity
13343200000 USD
CY2020Q3 us-gaap Minority Interest
MinorityInterest
-14000000.0 USD
CY2019Q4 us-gaap Minority Interest
MinorityInterest
-4100000 USD
CY2020Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
10744500000 USD
CY2019Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
13339100000 USD
CY2020Q3 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
24934100000 USD
CY2019Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
27234300000 USD
us-gaap Profit Loss
ProfitLoss
3702900000 USD
us-gaap Profit Loss
ProfitLoss
4448800000 USD
us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
366800000 USD
us-gaap Depreciation Depletion And Amortization
DepreciationDepletionAndAmortization
567600000 USD
us-gaap Research And Development In Process
ResearchAndDevelopmentInProcess
75000000.0 USD
us-gaap Research And Development In Process
ResearchAndDevelopmentInProcess
0 USD
us-gaap Share Based Compensation
ShareBasedCompensation
149300000 USD
us-gaap Share Based Compensation
ShareBasedCompensation
143900000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
23500000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
66300000 USD
us-gaap Income Loss From Individually Significant Component Disposed Of Or Held For Sale Excluding Discontinued Operations Attributable To Parent Before Income Tax
IncomeLossFromIndividuallySignificantComponentDisposedOfOrHeldForSaleExcludingDiscontinuedOperationsAttributableToParentBeforeIncomeTax
0 USD
us-gaap Income Loss From Individually Significant Component Disposed Of Or Held For Sale Excluding Discontinued Operations Attributable To Parent Before Income Tax
IncomeLossFromIndividuallySignificantComponentDisposedOfOrHeldForSaleExcludingDiscontinuedOperationsAttributableToParentBeforeIncomeTax
-95500000 USD
us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
211900000 USD
us-gaap Deferred Income Tax Expense Benefit
DeferredIncomeTaxExpenseBenefit
28400000 USD
us-gaap Increase Decrease In Equity Securities Fv Ni
IncreaseDecreaseInEquitySecuritiesFvNi
-41800000 USD
us-gaap Increase Decrease In Equity Securities Fv Ni
IncreaseDecreaseInEquitySecuritiesFvNi
189800000 USD
us-gaap Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
14700000 USD
us-gaap Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
63500000 USD
us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
-110100000 USD
us-gaap Other Noncash Income Expense
OtherNoncashIncomeExpense
-87400000 USD
us-gaap Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
135700000 USD
us-gaap Increase Decrease In Accounts Receivable
IncreaseDecreaseInAccountsReceivable
2400000 USD
us-gaap Increase Decrease In Due From Related Parties
IncreaseDecreaseInDueFromRelatedParties
-63000000.0 USD
us-gaap Increase Decrease In Due From Related Parties
IncreaseDecreaseInDueFromRelatedParties
55400000 USD
us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
270600000 USD
us-gaap Increase Decrease In Inventories
IncreaseDecreaseInInventories
-47300000 USD
us-gaap Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
372900000 USD
us-gaap Increase Decrease In Accrued Liabilities
IncreaseDecreaseInAccruedLiabilities
-109100000 USD
us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
15300000 USD
us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
64600000 USD
us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
97000000.0 USD
us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
5600000 USD
us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
4596900000 USD
us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
5118400000 USD
us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
5240700000 USD
us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
3867600000 USD
us-gaap Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
4649100000 USD
us-gaap Payments To Acquire Available For Sale Securities Debt
PaymentsToAcquireAvailableForSaleSecuritiesDebt
4052100000 USD
us-gaap Payments To Acquire Other Productive Assets
PaymentsToAcquireOtherProductiveAssets
0 USD
us-gaap Payments To Acquire Other Productive Assets
PaymentsToAcquireOtherProductiveAssets
300000000.0 USD
us-gaap Payments To Acquire Business Two Net Of Cash Acquired
PaymentsToAcquireBusinessTwoNetOfCashAcquired
0 USD
us-gaap Payments To Acquire Business Two Net Of Cash Acquired
PaymentsToAcquireBusinessTwoNetOfCashAcquired
744400000 USD
us-gaap Proceeds From Sale Of Property Plant And Equipment
ProceedsFromSaleOfPropertyPlantAndEquipment
0 USD
us-gaap Proceeds From Sale Of Property Plant And Equipment
ProceedsFromSaleOfPropertyPlantAndEquipment
923700000 USD
us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
338800000 USD
us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
404100000 USD
us-gaap Payments To Acquire In Process Research And Development
PaymentsToAcquireInProcessResearchAndDevelopment
75000000.0 USD
us-gaap Payments To Acquire In Process Research And Development
PaymentsToAcquireInProcessResearchAndDevelopment
0 USD
us-gaap Payments To Acquire Intangible Assets
PaymentsToAcquireIntangibleAssets
37000000.0 USD
us-gaap Payments To Acquire Intangible Assets
PaymentsToAcquireIntangibleAssets
0 USD
us-gaap Proceeds From Sale Of Available For Sale Securities Equity
ProceedsFromSaleOfAvailableForSaleSecuritiesEquity
500000 USD
us-gaap Proceeds From Sale Of Available For Sale Securities Equity
ProceedsFromSaleOfAvailableForSaleSecuritiesEquity
476000000.0 USD
us-gaap Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
18000000.0 USD
us-gaap Payments For Proceeds From Other Investing Activities
PaymentsForProceedsFromOtherInvestingActivities
4600000 USD
us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-442200000 USD
us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-237900000 USD
us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
6279100000 USD
us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
3775200000 USD
us-gaap Payments Related To Tax Withholding For Share Based Compensation
PaymentsRelatedToTaxWithholdingForShareBasedCompensation
11800000 USD
us-gaap Payments Related To Tax Withholding For Share Based Compensation
PaymentsRelatedToTaxWithholdingForShareBasedCompensation
16900000 USD
us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
2967300000 USD
us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
0 USD
us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
1500000000.0 USD
us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
0 USD
us-gaap Payments To Minority Shareholders
PaymentsToMinorityShareholders
70900000 USD
us-gaap Payments To Minority Shareholders
PaymentsToMinorityShareholders
-4300000 USD
us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
22900000 USD
us-gaap Proceeds From Payments For Other Financing Activities
ProceedsFromPaymentsForOtherFinancingActivities
43800000 USD
us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-4871600000 USD
us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-3744000000.0 USD
us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
-716900000 USD
us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
1136500000 USD
us-gaap Effect Of Exchange Rate On Cash And Cash Equivalents
EffectOfExchangeRateOnCashAndCashEquivalents
28000000.0 USD
us-gaap Effect Of Exchange Rate On Cash And Cash Equivalents
EffectOfExchangeRateOnCashAndCashEquivalents
-17200000 USD
CY2019Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
2913700000 USD
CY2018Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
1224600000 USD
CY2020Q3 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
2224800000 USD
CY2019Q3 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
2343900000 USD
CY2020Q2 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
11289200000 USD
CY2020Q3 us-gaap Profit Loss
ProfitLoss
703900000 USD
CY2020Q3 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
-45400000 USD
CY2020Q3 biib Noncontrollinginterestincreasedecreaseother
Noncontrollinginterestincreasedecreaseother
4000000.0 USD
CY2020Q3 us-gaap Stock Issued During Period Value Treasury Stock Reissued
StockIssuedDuringPeriodValueTreasuryStockReissued
9700000 USD
CY2020Q3 us-gaap Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
-2300000 USD
CY2020Q3 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
-35400000 USD
CY2020Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
10744500000 USD
CY2019Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
13339100000 USD
us-gaap Profit Loss
ProfitLoss
3702900000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
-89400000 USD
biib Noncontrollinginterestincreasedecreaseother
Noncontrollinginterestincreasedecreaseother
-75000000.0 USD
us-gaap Stock Issued During Period Value Treasury Stock Reissued
StockIssuedDuringPeriodValueTreasuryStockReissued
38800000 USD
us-gaap Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
-50300000 USD
us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
-154200000 USD
us-gaap Stockholders Equity Other
StockholdersEquityOther
700000 USD
CY2020Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
10744500000 USD
CY2019Q2 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
12948800000 USD
CY2019Q3 us-gaap Profit Loss
ProfitLoss
1545900000 USD
CY2019Q3 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
160600000 USD
CY2019Q3 us-gaap Stock Issued During Period Value Treasury Stock Reissued
StockIssuedDuringPeriodValueTreasuryStockReissued
7300000 USD
CY2019Q3 us-gaap Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
-700000 USD
CY2019Q3 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
-47800000 USD
CY2019Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
13991800000 USD
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
13031600000 USD
us-gaap Profit Loss
ProfitLoss
4448800000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
147700000 USD
biib Noncontrollinginterestincreasedecreaseother
Noncontrollinginterestincreasedecreaseother
4300000 USD
us-gaap Stock Issued During Period Value Treasury Stock Reissued
StockIssuedDuringPeriodValueTreasuryStockReissued
33500000 USD
us-gaap Stock Issued During Period Value Stock Options Exercised
StockIssuedDuringPeriodValueStockOptionsExercised
-50700000 USD
us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
-151800000 USD
CY2019Q3 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
13991800000 USD
biib Number Of Ophthalmolgy Biosimilar Products Exclusive Rights
NumberOfOphthalmolgyBiosimilarProductsExclusiveRights
2 product
us-gaap Number Of Reportable Segments
NumberOfReportableSegments
1 segment
biib Interest In Subsidiary
InterestInSubsidiary
1
us-gaap Use Of Estimates
UseOfEstimates
The preparation of our condensed consolidated financial statements requires us to make estimates, judgments and assumptions that may affect the reported amounts of assets, liabilities, equity, revenues and expenses and related disclosure of contingent assets and liabilities. On an ongoing basis we evaluate our estimates, judgments and methodologies. We base our estimates on historical experience and on various other assumptions that we believe are reasonable, the results of which form the basis for making judgments about the carrying values of assets, liabilities and equity and the amount of revenues and expenses. Actual results may differ from these estimates.The length of time and full extent to which the COVID-19 pandemic directly or indirectly impacts our business, results of operations and financial condition, including sales, expenses, reserves and allowances, manufacturing, clinical trials, research and development costs and employee-related amounts, depends on future developments that are highly uncertain, subject to change and are difficult to predict, including as a result of new information that may emerge concerning COVID-19 and the actions taken to contain or treat COVID-19 as well as the economic impact on local, regional, national and international customers and markets. We have made estimates of the impact of COVID-19 within our condensed consolidated financial statements and there may be changes to those estimates in future periods.
CY2019Q2 biib Clinical Assets Acquired
ClinicalAssetsAcquired
2 Assets
CY2019Q3 biib Inventoryrawmaterialssoldto Fujifilm
InventoryrawmaterialssoldtoFUJIFILM
41800000 USD
biib Number Of Wholesalers
NumberOfWholesalers
2 wholesaler
CY2020Q3 biib Number Of Wholesalers
NumberOfWholesalers
2 wholesaler
biib Number Of Wholesalers
NumberOfWholesalers
2 wholesaler
CY2020Q3 biib Number Of Wholesalers
NumberOfWholesalers
2 wholesaler
CY2019Q4 us-gaap Valuation Allowances And Reserves Balance
ValuationAllowancesAndReservesBalance
1198900000 USD
biib Current Provisions To Product Revenue Reserves Relating To Sales In Current Year
CurrentProvisionsToProductRevenueReservesRelatingToSalesInCurrentYear
3070200000 USD
biib Adjustments To Product Revenue Reserves Relating To Sales In Prior Years
AdjustmentsToProductRevenueReservesRelatingToSalesInPriorYears
40800000 USD
biib Payments Returns Applied Against Product Revenue Reserves Relating To Current Year
PaymentsReturnsAppliedAgainstProductRevenueReservesRelatingToCurrentYear
2162400000 USD
biib Payments Returns Applied Against Product Revenue Reserves Relating To Prior Year
PaymentsReturnsAppliedAgainstProductRevenueReservesRelatingToPriorYear
794100000 USD
CY2020Q3 us-gaap Valuation Allowances And Reserves Balance
ValuationAllowancesAndReservesBalance
1271800000 USD
CY2020Q3 us-gaap Inventory Work In Process Net Of Reserves
InventoryWorkInProcessNetOfReserves
539900000 USD
CY2020Q3 us-gaap Valuation Allowances And Reserves Balance
ValuationAllowancesAndReservesBalance
1271800000 USD
CY2019Q4 us-gaap Valuation Allowances And Reserves Balance
ValuationAllowancesAndReservesBalance
1198900000 USD
CY2020Q3 us-gaap Inventory Raw Materials Net Of Reserves
InventoryRawMaterialsNetOfReserves
288400000 USD
CY2019Q4 us-gaap Inventory Raw Materials Net Of Reserves
InventoryRawMaterialsNetOfReserves
169700000 USD
CY2019Q4 us-gaap Inventory Work In Process Net Of Reserves
InventoryWorkInProcessNetOfReserves
460000000.0 USD
CY2020Q3 us-gaap Inventory Finished Goods Net Of Reserves
InventoryFinishedGoodsNetOfReserves
199400000 USD
CY2019Q4 us-gaap Inventory Finished Goods Net Of Reserves
InventoryFinishedGoodsNetOfReserves
174500000 USD
CY2020Q3 biib Inventorynetcurrentandnoncurrent
Inventorynetcurrentandnoncurrent
1027700000 USD
CY2019Q4 biib Inventorynetcurrentandnoncurrent
Inventorynetcurrentandnoncurrent
804200000 USD
CY2020Q3 us-gaap Intangible Assets Gross Excluding Goodwill
IntangibleAssetsGrossExcludingGoodwill
8401300000 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
5077700000 USD
CY2020Q3 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
3323600000 USD
CY2019Q4 us-gaap Intangible Assets Gross Excluding Goodwill
IntangibleAssetsGrossExcludingGoodwill
8408800000 USD
CY2019Q4 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
4881400000 USD
CY2019Q4 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
3527400000 USD
CY2020Q3 biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
82600000 USD
biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
215600000 USD
CY2019Q3 biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
283900000 USD
biib Amortization And Impairment Of Acquired Intangible Assets
AmortizationAndImpairmentOfAcquiredIntangibleAssets
422200000 USD
CY2020Q3 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
63300000 USD
us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
196300000 USD
CY2019Q3 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
68000000.0 USD
us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
206300000 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year
FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
60000000.0 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Next Twelve Months
FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
205000000.0 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
215000000.0 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
215000000.0 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
225000000.0 USD
CY2020Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
220000000.0 USD
CY2019Q4 us-gaap Goodwill
Goodwill
5757800000 USD
us-gaap Goodwill Other Increase Decrease
GoodwillOtherIncreaseDecrease
-2100000 USD
CY2020Q3 us-gaap Goodwill
Goodwill
5755700000 USD
CY2020Q3 us-gaap Goodwill Impaired Accumulated Impairment Loss
GoodwillImpairedAccumulatedImpairmentLoss
0 USD
us-gaap Asset Impairment Charges
AssetImpairmentCharges
0 USD
CY2020Q3 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
8336000000.0 USD
CY2020Q3 us-gaap Notes Payable
NotesPayable
7425000000.0 USD
CY2019Q4 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
6553600000 USD
CY2019Q4 us-gaap Notes Payable
NotesPayable
5954800000 USD
CY2020Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
29000000.0 USD
CY2019Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
57800000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
23500000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
66300000 USD
CY2020Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
0 USD
CY2019Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
0 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
0 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements
0 USD
CY2020Q3 us-gaap Business Combination Contingent Consideration Liability Noncurrent
BusinessCombinationContingentConsiderationLiabilityNoncurrent
173200000 USD
CY2019Q4 us-gaap Business Combination Contingent Consideration Liability Noncurrent
BusinessCombinationContingentConsiderationLiabilityNoncurrent
197700000 USD
CY2020Q3 us-gaap Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Asset1
BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1
61200000 USD
us-gaap Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Asset1
BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationAsset1
61200000 USD
CY2020Q3 us-gaap Cash Equivalents At Carrying Value
CashEquivalentsAtCarryingValue
1570300000 USD
CY2019Q4 us-gaap Cash Equivalents At Carrying Value
CashEquivalentsAtCarryingValue
2541100000 USD
CY2020Q3 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2358400000 USD
CY2020Q3 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
400000 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
2364800000 USD
CY2020Q3 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
6800000 USD
CY2019Q4 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2965000000.0 USD
CY2019Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
6000000.0 USD
CY2019Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
700000 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
2970300000 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Maturities Within One Year Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
1355000000.0 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Maturities Within One Year Fair Value
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
1353400000 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Maturities Within One Year Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
1562200000 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Maturities Within One Year Fair Value
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
1560800000 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
902200000 USD
CY2020Q3 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
897900000 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
1234500000 USD
CY2019Q4 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
1230400000 USD
CY2020Q3 biib Available For Sale Securities Debt Maturities After Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost
107600000 USD
CY2020Q3 biib Available For Sale Securities Debt Maturities After Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue
107100000 USD
CY2019Q4 biib Available For Sale Securities Debt Maturities After Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost
173600000 USD
CY2019Q4 biib Available For Sale Securities Debt Maturities After Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue
173800000 USD
CY2020Q3 us-gaap Available For Sale Securities
AvailableForSaleSecurities
2364800000 USD
CY2020Q3 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2358400000 USD
CY2019Q4 us-gaap Available For Sale Securities
AvailableForSaleSecurities
2970300000 USD
CY2019Q4 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2965000000.0 USD
biib Average Maturity Of Marketable Securities
AverageMaturityOfMarketableSecurities
P12M
CY2019 biib Average Maturity Of Marketable Securities
AverageMaturityOfMarketableSecurities
P14M
CY2020Q3 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
1360900000 USD
CY2019Q3 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
611800000 USD
us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
5240700000 USD
us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
3867600000 USD
CY2020Q3 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
1000000.0 USD
CY2019Q3 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
700000 USD
us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
12800000 USD
us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
2300000 USD
CY2020Q3 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
900000 USD
CY2019Q3 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
100000 USD
us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
25200000 USD
us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
700000 USD
CY2019Q4 biib Unrealized Gain Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGainLossesOnForeignCurrencyDerivativesNetBeforeTax
500000 USD
CY2020Q3 biib Unrealized Gain Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGainLossesOnForeignCurrencyDerivativesNetBeforeTax
-114600000 USD
CY2020Q3 biib Unrealized Gain Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGainLossesOnForeignCurrencyDerivativesNetBeforeTax
-114600000 USD
CY2020Q3 us-gaap Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments
GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
7800000 USD
us-gaap Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments
GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
13700000 USD
CY2019Q3 us-gaap Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments
GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
10300000 USD
us-gaap Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments
GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
-14200000 USD
CY2020Q3 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
1734800000 USD
CY2019Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
1590900000 USD
CY2020Q3 us-gaap Depreciation
Depreciation
51500000 USD
us-gaap Depreciation
Depreciation
151200000 USD
CY2019Q3 us-gaap Depreciation
Depreciation
45500000 USD
us-gaap Depreciation
Depreciation
145400000 USD
us-gaap Payments Of Financing Costs
PaymentsOfFinancingCosts
24400000 USD
CY2019Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-135200000 USD
us-gaap Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
-54400000 USD
us-gaap Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
-35900000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
-90300000 USD
CY2020Q3 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-225500000 USD
CY2018Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-240400000 USD
us-gaap Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
233700000 USD
us-gaap Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
-85600000 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
148100000 USD
CY2019Q3 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-92300000 USD
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
701500000 USD
CY2019Q3 us-gaap Net Income Loss
NetIncomeLoss
1545900000 USD
us-gaap Net Income Loss
NetIncomeLoss
3642700000 USD
us-gaap Net Income Loss
NetIncomeLoss
4448800000 USD
CY2020Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
156900000 shares
CY2019Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
184000000.0 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
163400000 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
190300000 shares
CY2020Q3 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
300000 shares
CY2019Q3 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
200000 shares
us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
300000 shares
us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
200000 shares
CY2020Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
157200000 shares
CY2019Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
184200000 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
163700000 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
190500000 shares
CY2020Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
39600000 USD
CY2019Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
49600000 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
161500000 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
182000000.0 USD
CY2020Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1900000 USD
CY2019Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1700000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
4900000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
7800000 USD
CY2020Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
37700000 USD
CY2019Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
47900000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
156600000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
174200000 USD
CY2020Q3 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
5400000 USD
CY2019Q3 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
8100000 USD
us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
25700000 USD
us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
29100000 USD
CY2020Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
39600000 USD
CY2019Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
49600000 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
161500000 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
182000000.0 USD
CY2020Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1900000 USD
CY2019Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1700000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
4900000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
7800000 USD
CY2020Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
37700000 USD
CY2019Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
47900000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
156600000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
174200000 USD
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.009
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.009
us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.006
us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.007
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.030
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.050
us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.036
us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.047
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.023
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.015
us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.013
us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.010
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
0.029
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
0.004
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
0.008
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
0.004
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Disposition Of Assets
EffectiveIncomeTaxRateReconciliationDispositionOfAssets
0
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Disposition Of Assets
EffectiveIncomeTaxRateReconciliationDispositionOfAssets
0
us-gaap Effective Income Tax Rate Reconciliation Disposition Of Assets
EffectiveIncomeTaxRateReconciliationDispositionOfAssets
0
us-gaap Effective Income Tax Rate Reconciliation Disposition Of Assets
EffectiveIncomeTaxRateReconciliationDispositionOfAssets
0.015
CY2020Q3 biib Effective Income Tax Rate Reconciliation Intellectual Property Rights Reorganization
EffectiveIncomeTaxRateReconciliationIntellectualPropertyRightsReorganization
0
CY2019Q3 biib Effective Income Tax Rate Reconciliation Intellectual Property Rights Reorganization
EffectiveIncomeTaxRateReconciliationIntellectualPropertyRightsReorganization
-0.015
biib Effective Income Tax Rate Reconciliation Intellectual Property Rights Reorganization
EffectiveIncomeTaxRateReconciliationIntellectualPropertyRightsReorganization
0
biib Effective Income Tax Rate Reconciliation Intellectual Property Rights Reorganization
EffectiveIncomeTaxRateReconciliationIntellectualPropertyRightsReorganization
-0.021
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
0.035
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
0
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
0.019
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
0
CY2020Q3 biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.022
CY2019Q3 biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.016
biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.013
biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.016
CY2020Q3 biib Effective Income Tax Rate Reconciliation Change In Foreign Tax Rate Percent
EffectiveIncomeTaxRateReconciliationChangeInForeignTaxRatePercent
0
CY2019Q3 biib Effective Income Tax Rate Reconciliation Change In Foreign Tax Rate Percent
EffectiveIncomeTaxRateReconciliationChangeInForeignTaxRatePercent
-0.031
biib Effective Income Tax Rate Reconciliation Change In Foreign Tax Rate Percent
EffectiveIncomeTaxRateReconciliationChangeInForeignTaxRatePercent
0
biib Effective Income Tax Rate Reconciliation Change In Foreign Tax Rate Percent
EffectiveIncomeTaxRateReconciliationChangeInForeignTaxRatePercent
-0.010
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Other
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
-0.006
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Other
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
-0.001
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Other
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
0
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Other
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther
0.002
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.005
CY2019Q3 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
-0.008
us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.002
us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
-0.003
CY2020Q3 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.251
CY2019Q3 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.119
us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.209
us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.163
CY2019Q3 us-gaap Deferred Tax Assets Other
DeferredTaxAssetsOther
754200000 USD
CY2019Q3 us-gaap Deferred Tax Liabilities Other
DeferredTaxLiabilitiesOther
603400000 USD
CY2019Q4 us-gaap Decrease In Unrecognized Tax Benefits Is Reasonably Possible
DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible
75000000.0 USD
CY2020Q3 us-gaap Investment Income Interest
InvestmentIncomeInterest
6000000.0 USD
CY2019Q3 us-gaap Investment Income Interest
InvestmentIncomeInterest
30500000 USD
us-gaap Investment Income Interest
InvestmentIncomeInterest
38000000.0 USD
us-gaap Investment Income Interest
InvestmentIncomeInterest
90800000 USD
CY2020Q3 us-gaap Interest Expense
InterestExpense
56300000 USD
CY2019Q3 us-gaap Interest Expense
InterestExpense
45800000 USD
us-gaap Interest Expense
InterestExpense
166500000 USD
us-gaap Interest Expense
InterestExpense
141400000 USD
CY2020Q3 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-82100000 USD
CY2019Q3 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-4100000 USD
us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-52600000 USD
us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
198900000 USD
CY2020Q3 us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
3100000 USD
CY2019Q3 us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-4200000 USD
us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-5400000 USD
us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-4700000 USD
CY2020Q3 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
700000 USD
CY2019Q3 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-3700000 USD
us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
400000 USD
us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-11000000.0 USD
CY2020Q3 us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-128600000 USD
CY2019Q3 us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-27300000 USD
us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-186100000 USD
us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
132600000 USD
CY2020Q3 us-gaap Unrealized Gain Loss On Investments
UnrealizedGainLossOnInvestments
-82100000 USD
CY2019Q3 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-4100000 USD
CY2019Q3 us-gaap Unrealized Gain Loss On Investments
UnrealizedGainLossOnInvestments
40300000 USD
us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
198900000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-82300000 USD
CY2019Q3 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-4600000 USD
us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-40300000 USD
us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
197300000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
0 USD
CY2019Q3 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
4400000 USD
us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
0 USD
us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
-46800000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-82300000 USD
CY2019Q3 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-9000000.0 USD
us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-40300000 USD
us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
150500000 USD
CY2020Q3 us-gaap Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
279000000.0 USD
CY2019Q4 us-gaap Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
309100000 USD
CY2020Q3 us-gaap Accrued Royalties Current
AccruedRoyaltiesCurrent
222800000 USD
CY2019Q4 us-gaap Accrued Royalties Current
AccruedRoyaltiesCurrent
220900000 USD
CY2020Q3 biib Collaborationexpensesaccrual
Collaborationexpensesaccrual
277900000 USD
CY2019Q4 biib Collaborationexpensesaccrual
Collaborationexpensesaccrual
281600000 USD
CY2020Q3 us-gaap Business Combination Contingent Consideration Liability Current
BusinessCombinationContingentConsiderationLiabilityCurrent
164400000 USD
CY2019Q4 us-gaap Business Combination Contingent Consideration Liability Current
BusinessCombinationContingentConsiderationLiabilityCurrent
148400000 USD
CY2020Q3 us-gaap Construction Payable Current And Noncurrent
ConstructionPayableCurrentAndNoncurrent
23400000 USD
CY2019Q4 us-gaap Construction Payable Current And Noncurrent
ConstructionPayableCurrentAndNoncurrent
78000000.0 USD
CY2020Q3 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
1274800000 USD
CY2019Q4 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
726700000 USD
CY2020Q3 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
3286200000 USD
CY2019Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
2765800000 USD
CY2020Q3 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1428100000 USD
CY2019Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1348900000 USD
CY2020Q3 us-gaap Accrued Income Taxes Noncurrent
AccruedIncomeTaxesNoncurrent
729300000 USD
CY2019Q4 us-gaap Accrued Income Taxes Noncurrent
AccruedIncomeTaxesNoncurrent
803300000 USD
us-gaap Tax Cuts And Jobs Act Of2017 Transition Tax For Accumulated Foreign Earnings Income Tax Expense
TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsIncomeTaxExpense
635000000.0 USD
CY2020Q1 us-gaap Tax Cuts And Jobs Act Of2017 Transition Tax For Accumulated Foreign Earnings Income Tax Expense
TaxCutsAndJobsActOf2017TransitionTaxForAccumulatedForeignEarningsIncomeTaxExpense
697000000.0 USD
CY2020Q3 biib Investment In Biotechnology Companies That Are Determined To Be Unconsolidated Variable Interest Entities
InvestmentInBiotechnologyCompaniesThatAreDeterminedToBeUnconsolidatedVariableInterestEntities
21900000 USD
CY2019Q4 biib Investment In Biotechnology Companies That Are Determined To Be Unconsolidated Variable Interest Entities
InvestmentInBiotechnologyCompaniesThatAreDeterminedToBeUnconsolidatedVariableInterestEntities
22700000 USD
CY2019Q4 us-gaap Loss Contingency Estimate Of Possible Loss
LossContingencyEstimateOfPossibleLoss
200000000.0 USD
CY2020Q3 biib Disputed Claims Relatingto Construction Costs
DisputedClaimsRelatingtoConstructionCosts
31000000.0 CHF
CY2020Q3 biib Disputed Claims Relatingto Construction Costs
DisputedClaimsRelatingtoConstructionCosts
33000000.0 USD

Files In Submission

Name View Source Status
0000875045-20-000036-index-headers.html Edgar Link pending
0000875045-20-000036-index.html Edgar Link pending
0000875045-20-000036.txt Edgar Link pending
0000875045-20-000036-xbrl.zip Edgar Link pending
biib-20200930.htm Edgar Link pending
biib-20200930.xsd Edgar Link pending
biib-20200930_cal.xml Edgar Link unprocessable
biib-20200930_def.xml Edgar Link unprocessable
biib-20200930_g1.jpg Edgar Link pending
biib-20200930_g10.jpg Edgar Link pending
biib-20200930_g11.jpg Edgar Link pending
biib-20200930_g12.jpg Edgar Link pending
biib-20200930_g13.jpg Edgar Link pending
biib-20200930_g14.jpg Edgar Link pending
biib-20200930_g15.jpg Edgar Link pending
biib-20200930_g16.jpg Edgar Link pending
biib-20200930_g17.jpg Edgar Link pending
biib-20200930_g18.jpg Edgar Link pending
biib-20200930_g19.jpg Edgar Link pending
biib-20200930_g2.jpg Edgar Link pending
biib-20200930_g20.jpg Edgar Link pending
biib-20200930_g21.jpg Edgar Link pending
biib-20200930_g22.jpg Edgar Link pending
biib-20200930_g23.jpg Edgar Link pending
biib-20200930_g3.jpg Edgar Link pending
biib-20200930_g4.jpg Edgar Link pending
biib-20200930_g5.jpg Edgar Link pending
biib-20200930_g6.jpg Edgar Link pending
biib-20200930_g7.jpg Edgar Link pending
biib-20200930_g8.jpg Edgar Link pending
biib-20200930_g9.jpg Edgar Link pending
biib-20200930_htm.xml Edgar Link completed
biib-20200930_lab.xml Edgar Link unprocessable
biib-20200930_pre.xml Edgar Link unprocessable
biib-2020930xex311.htm Edgar Link pending
biib-2020930xex312.htm Edgar Link pending
biib-2020930xex321.htm Edgar Link pending
exhibit101-severancepo.htm Edgar Link pending
exhibit102-mcdonnellof.htm Edgar Link pending
exhibit103-capellosepa.htm Edgar Link pending
FilingSummary.xml Edgar Link unprocessable
Financial_Report.xlsx Edgar Link pending
image01.jpg Edgar Link pending
image11.jpg Edgar Link pending
image111.jpg Edgar Link pending
MetaLinks.json Edgar Link pending
R1.htm Edgar Link pending
R10.htm Edgar Link pending
R11.htm Edgar Link pending
R12.htm Edgar Link pending
R13.htm Edgar Link pending
R14.htm Edgar Link pending
R15.htm Edgar Link pending
R16.htm Edgar Link pending
R17.htm Edgar Link pending
R18.htm Edgar Link pending
R19.htm Edgar Link pending
R2.htm Edgar Link pending
R20.htm Edgar Link pending
R21.htm Edgar Link pending
R22.htm Edgar Link pending
R23.htm Edgar Link pending
R24.htm Edgar Link pending
R25.htm Edgar Link pending
R26.htm Edgar Link pending
R27.htm Edgar Link pending
R28.htm Edgar Link pending
R29.htm Edgar Link pending
R3.htm Edgar Link pending
R30.htm Edgar Link pending
R31.htm Edgar Link pending
R32.htm Edgar Link pending
R33.htm Edgar Link pending
R34.htm Edgar Link pending
R35.htm Edgar Link pending
R36.htm Edgar Link pending
R37.htm Edgar Link pending
R38.htm Edgar Link pending
R39.htm Edgar Link pending
R4.htm Edgar Link pending
R40.htm Edgar Link pending
R41.htm Edgar Link pending
R42.htm Edgar Link pending
R43.htm Edgar Link pending
R44.htm Edgar Link pending
R45.htm Edgar Link pending
R46.htm Edgar Link pending
R47.htm Edgar Link pending
R48.htm Edgar Link pending
R49.htm Edgar Link pending
R5.htm Edgar Link pending
R50.htm Edgar Link pending
R51.htm Edgar Link pending
R52.htm Edgar Link pending
R53.htm Edgar Link pending
R54.htm Edgar Link pending
R55.htm Edgar Link pending
R56.htm Edgar Link pending
R57.htm Edgar Link pending
R58.htm Edgar Link pending
R59.htm Edgar Link pending
R6.htm Edgar Link pending
R60.htm Edgar Link pending
R61.htm Edgar Link pending
R62.htm Edgar Link pending
R63.htm Edgar Link pending
R64.htm Edgar Link pending
R65.htm Edgar Link pending
R66.htm Edgar Link pending
R67.htm Edgar Link pending
R68.htm Edgar Link pending
R69.htm Edgar Link pending
R7.htm Edgar Link pending
R70.htm Edgar Link pending
R71.htm Edgar Link pending
R72.htm Edgar Link pending
R73.htm Edgar Link pending
R74.htm Edgar Link pending
R75.htm Edgar Link pending
R76.htm Edgar Link pending
R77.htm Edgar Link pending
R78.htm Edgar Link pending
R79.htm Edgar Link pending
R8.htm Edgar Link pending
R80.htm Edgar Link pending
R9.htm Edgar Link pending
report.css Edgar Link pending
Show.js Edgar Link pending