$BIIB
BIOGEN INC.

2021 Q4 Form 10-Q Financial Statement

#000087504521000052 Filed on October 20, 2021

View on sec.gov

Income Statement

Concept 2021 Q4 2021 Q3 2020 Q3
Revenue $2.734B $2.779B $3.376B
YoY Change -4.16% -17.69% -6.22%
Cost Of Revenue $660.1M $511.8M $449.1M
YoY Change 34.55% 13.96% 4.44%
Gross Profit $2.074B $2.267B $2.927B
YoY Change -12.2% -22.55% -7.67%
Gross Profit Margin 75.85% 81.58% 86.7%
Selling, General & Admin $787.9M $654.1M $573.1M
YoY Change -2.27% 14.13% 3.35%
% of Gross Profit 37.99% 28.85% 19.58%
Research & Development $699.5M $702.4M $1.141B
YoY Change -59.48% -38.43% 111.12%
% of Gross Profit 33.73% 30.98% 38.98%
Depreciation & Amortization $134.7M $65.10M $51.50M
YoY Change 49.0% 26.41% 13.19%
% of Gross Profit 6.5% 2.87% 1.76%
Operating Expenses $1.554B $1.357B $1.714B
YoY Change -38.54% -20.86% 56.54%
Operating Profit $519.8M $794.0M $1.086B
YoY Change -412.38% -26.91% -39.85%
Interest Expense -$113.2M $66.30M $56.30M
YoY Change -118.42% 17.76% 22.93%
% of Operating Profit -21.78% 8.35% 5.18%
Other Income/Expense, Net -$1.600M -$502.9M -$128.6M
YoY Change -164.0% 291.06% 371.06%
Pretax Income $405.0M $291.1M $957.8M
YoY Change 14.76% -69.61% -46.16%
Income Tax $443.2M -$25.90M $240.8M
% Of Pretax Income 109.43% -8.9% 25.14%
Net Earnings $368.2M $329.2M $701.5M
YoY Change 2.88% -53.07% -54.62%
Net Earnings / Revenue 13.47% 11.85% 20.78%
Basic Earnings Per Share $2.22 $4.47
Diluted Earnings Per Share $2.496M $2.22 $4.46
COMMON SHARES
Basic Shares Outstanding 146.9M shares 148.0M shares 156.9M shares
Diluted Shares Outstanding 148.6M shares 157.2M shares

Balance Sheet

Concept 2021 Q4 2021 Q3 2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments $3.803B $2.955B $3.580B
YoY Change 45.68% -17.45% -19.33%
Cash & Equivalents $2.261B $1.542B $2.225B
Short-Term Investments $1.541B $1.413B $1.355B
Other Short-Term Assets $740.8M $736.3M $683.5M
YoY Change -15.92% 7.72% -8.03%
Inventory $1.352B $1.348B $1.028B
Prepaid Expenses
Receivables $1.549B $1.723B $2.025B
Other Receivables $0.00 $0.00 $0.00
Total Short-Term Assets $7.857B $7.162B $7.843B
YoY Change 14.08% -8.68% -7.16%
LONG-TERM ASSETS
Property, Plant & Equipment $3.416B $3.411B $3.360B
YoY Change 0.14% 1.51% 7.07%
Goodwill $5.761B $5.761B $5.756B
YoY Change -0.02% 0.08% 0.17%
Intangibles $2.221B $2.287B $3.324B
YoY Change -27.98% -31.2% -2.03%
Long-Term Investments $2.832B $2.987B $2.809B
YoY Change -22.87% 6.33% -6.89%
Other Assets $1.940B $2.019B $1.835B
YoY Change -33.1% 10.01% 48.12%
Total Long-Term Assets $16.02B $16.64B $17.09B
YoY Change -9.65% -2.61% -10.22%
TOTAL ASSETS
Total Short-Term Assets $7.857B $7.162B $7.843B
Total Long-Term Assets $16.02B $16.64B $17.09B
Total Assets $23.88B $23.81B $24.93B
YoY Change -3.01% -4.52% -9.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $589.2M $427.9M $398.4M
YoY Change 29.52% 7.4% 4.24%
Accrued Expenses $1.471B $1.521B $1.569B
YoY Change -14.28% -3.09% 5.59%
Deferred Revenue
YoY Change
Short-Term Debt $0.00 $0.00 $0.00
YoY Change
Long-Term Debt Due $999.1M $998.8M $0.00
YoY Change -100.0%
Total Short-Term Liabilities $4.298B $4.212B $3.804B
YoY Change 14.86% 10.72% -14.17%
LONG-TERM LIABILITIES
Long-Term Debt $6.274B $6.272B $7.425B
YoY Change -15.51% -15.52% 66.55%
Other Long-Term Liabilities $1.321B $1.318B $1.428B
YoY Change -0.68% -7.7% 4.17%
Total Long-Term Liabilities $1.321B $1.318B $1.428B
YoY Change -0.68% -7.7% 4.17%
TOTAL LIABILITIES
Total Short-Term Liabilities $4.298B $4.212B $3.804B
Total Long-Term Liabilities $1.321B $1.318B $1.428B
Total Liabilities $12.92B $12.93B $14.19B
YoY Change -7.29% -8.91% 5.17%
SHAREHOLDERS EQUITY
Retained Earnings $13.91B $13.54B $13.96B
YoY Change -0.46% -2.99% -18.19%
Common Stock $100.0K $100.0K $100.0K
YoY Change 0.0% 0.0% 0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost) $2.977B $2.977B $2.977B
YoY Change 0.0% 0.0% 0.0%
Treasury Stock Shares 23.80M shares
Shareholders Equity $10.90B $10.43B $10.76B
YoY Change
Total Liabilities & Shareholders Equity $23.88B $23.81B $24.93B
YoY Change -3.01% -4.52% -9.28%

Cashflow Statement

Concept 2021 Q4 2021 Q3 2020 Q3
OPERATING ACTIVITIES
Net Income $368.2M $329.2M $701.5M
YoY Change 2.88% -53.07% -54.62%
Depreciation, Depletion And Amortization $134.7M $65.10M $51.50M
YoY Change 49.0% 26.41% 13.19%
Cash From Operating Activities $838.3M $805.3M $1.181B
YoY Change -328.36% -31.82% -30.31%
INVESTING ACTIVITIES
Capital Expenditures -$68.50M -$61.90M -$84.10M
YoY Change -32.18% -26.4% -6.66%
Acquisitions
YoY Change
Other Investing Activities -$44.20M -$171.7M $31.70M
YoY Change -32.42% -641.64% -111.49%
Cash From Investing Activities -$112.7M -$233.6M -$52.40M
YoY Change -32.27% 345.8% -85.68%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities 9.800M -746.5M -1.313B
YoY Change -102.44% -43.14% 90.55%
NET CHANGE
Cash From Operating Activities 838.3M 805.3M 1.181B
Cash From Investing Activities -112.7M -233.6M -52.40M
Cash From Financing Activities 9.800M -746.5M -1.313B
Net Change In Cash 735.4M -174.8M -184.2M
YoY Change -178.69% -5.1% -128.78%
FREE CASH FLOW
Cash From Operating Activities $838.3M $805.3M $1.181B
Capital Expenditures -$68.50M -$61.90M -$84.10M
Free Cash Flow $906.8M $867.2M $1.265B
YoY Change -440.77% -31.46% -29.12%

Facts In Submission

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biib Number Of Wholesalers
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us-gaap Use Of Estimates
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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, revenue and expense and related disclosure of contingent assets and liabilities. On an ongoing basis we evaluate our estimates, judgments and assumptions. 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 revenue and expense. 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, the supply chain, manufacturing, clinical trials, research and development costs and employee-related costs, 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 the COVID-19 pandemic within our condensed consolidated financial statements and there may be changes to those estimates in future periods.
CY2021Q3 biib Number Of Wholesalers
NumberOfWholesalers
2 wholesaler
biib Number Of Wholesalers
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2 wholesaler
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1276000000 USD
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70800000 USD
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2021100000 USD
biib Payments Returns Applied Against Product Revenue Reserves Relating To Prior Year
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878700000 USD
CY2021Q3 us-gaap Valuation Allowances And Reserves Balance
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1128600000 USD
CY2021Q3 us-gaap Valuation Allowances And Reserves Balance
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1128600000 USD
CY2020Q4 us-gaap Valuation Allowances And Reserves Balance
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1276000000 USD
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314900000 USD
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CY2021Q3 us-gaap Inventory Finished Goods Net Of Reserves
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CY2021Q3 biib Amortization And Impairment Of Acquired Intangible Assets
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111000000 USD
biib Amortization And Impairment Of Acquired Intangible Assets
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813200000 USD
CY2020Q3 biib Amortization And Impairment Of Acquired Intangible Assets
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82600000 USD
biib Amortization And Impairment Of Acquired Intangible Assets
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215600000 USD
CY2021Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year
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70000000.0 USD
CY2021Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Next Twelve Months
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255000000.0 USD
CY2021Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Two
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210000000.0 USD
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195000000.0 USD
CY2021Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Four
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195000000.0 USD
CY2021Q3 us-gaap Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
180000000.0 USD
CY2020Q4 us-gaap Goodwill
Goodwill
5762100000 USD
us-gaap Goodwill Other Increase Decrease
GoodwillOtherIncreaseDecrease
-1600000 USD
CY2021Q3 us-gaap Goodwill
Goodwill
5760500000 USD
CY2021Q3 us-gaap Goodwill Impaired Accumulated Impairment Loss
GoodwillImpairedAccumulatedImpairmentLoss
0 USD
CY2021Q3 us-gaap Asset Impairment Charges
AssetImpairmentCharges
0 USD
us-gaap Asset Impairment Charges
AssetImpairmentCharges
0 USD
biib Technological And Regulatory Success Probability
TechnologicalAndRegulatorySuccessProbability
0.108
CY2021Q3 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
8046500000 USD
CY2021Q3 us-gaap Notes Payable
NotesPayable
7271100000 USD
CY2020Q4 us-gaap Debt Instrument Fair Value
DebtInstrumentFairValue
8515900000 USD
CY2020Q4 us-gaap Notes Payable
NotesPayable
7426200000 USD
CY2021Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
15600000 USD
CY2020Q3 us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
29000000.0 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
49100000 USD
us-gaap Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings
FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings
23500000 USD
CY2021Q3 us-gaap Business Combination Contingent Consideration Liability Noncurrent
BusinessCombinationContingentConsiderationLiabilityNoncurrent
210700000 USD
CY2020Q4 us-gaap Business Combination Contingent Consideration Liability Noncurrent
BusinessCombinationContingentConsiderationLiabilityNoncurrent
110300000 USD
CY2021Q3 us-gaap Cash Equivalents At Carrying Value
CashEquivalentsAtCarryingValue
978900000 USD
CY2020Q4 us-gaap Cash Equivalents At Carrying Value
CashEquivalentsAtCarryingValue
626900000 USD
CY2021Q3 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2381500000 USD
CY2021Q3 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
1100000 USD
CY2021Q3 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
1000000.0 USD
CY2021Q3 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
2381600000 USD
CY2021Q3 us-gaap Equity Securities Fv Ni Cost
EquitySecuritiesFvNiCost
1168900000 USD
CY2021Q3 biib Equity Securities Available For Sale Accumulated Gross Unrealized Gain Before Tax
EquitySecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax
257900000 USD
CY2021Q3 biib Equity Securities Available For Sale Accumulated Gross Unrealized Loss Before Tax
EquitySecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax
260600000 USD
CY2021Q3 us-gaap Equity Securities Fv Ni
EquitySecuritiesFvNi
1166200000 USD
CY2020Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
2300000 USD
CY2020Q4 us-gaap Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax
AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
400000 USD
CY2020Q4 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2049100000 USD
CY2020Q4 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
2051000000 USD
CY2020Q4 us-gaap Equity Securities Fv Ni Cost
EquitySecuritiesFvNiCost
1239500000 USD
CY2020Q4 biib Equity Securities Available For Sale Accumulated Gross Unrealized Gain Before Tax
EquitySecuritiesAvailableForSaleAccumulatedGrossUnrealizedGainBeforeTax
749700000 USD
CY2020Q4 biib Equity Securities Available For Sale Accumulated Gross Unrealized Loss Before Tax
EquitySecuritiesAvailableForSaleAccumulatedGrossUnrealizedLossBeforeTax
14900000 USD
CY2020Q4 us-gaap Equity Securities Fv Ni
EquitySecuritiesFvNi
1974300000 USD
CY2021Q3 us-gaap Available For Sale Securities Debt Maturities Within One Year Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
1413300000 USD
CY2021Q3 us-gaap Available For Sale Securities Debt Maturities Within One Year Fair Value
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
1413400000 USD
CY2020Q4 us-gaap Available For Sale Securities Debt Maturities Within One Year Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost
1278900000 USD
CY2020Q4 us-gaap Available For Sale Securities Debt Maturities Within One Year Fair Value
AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue
1278600000 USD
CY2021Q3 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
925500000 USD
CY2021Q3 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
925300000 USD
CY2020Q4 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost
722600000 USD
CY2020Q4 us-gaap Available For Sale Securities Debt Maturities After One Through Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue
721300000 USD
CY2021Q3 biib Available For Sale Securities Debt Maturities After Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost
42800000 USD
CY2021Q3 biib Available For Sale Securities Debt Maturities After Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue
42800000 USD
CY2020Q4 biib Available For Sale Securities Debt Maturities After Five Years Amortized Cost
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsAmortizedCost
49500000 USD
CY2020Q4 biib Available For Sale Securities Debt Maturities After Five Years Fair Value
AvailableForSaleSecuritiesDebtMaturitiesAfterFiveYearsFairValue
49200000 USD
CY2021Q3 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
2381600000 USD
CY2021Q3 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2381500000 USD
CY2020Q4 us-gaap Available For Sale Securities Debt Securities
AvailableForSaleSecuritiesDebtSecurities
2051000000 USD
CY2020Q4 us-gaap Available For Sale Debt Securities Amortized Cost Basis
AvailableForSaleDebtSecuritiesAmortizedCostBasis
2049100000 USD
biib Average Maturity Of Marketable Securities
AverageMaturityOfMarketableSecurities
P12M
CY2020 biib Average Maturity Of Marketable Securities
AverageMaturityOfMarketableSecurities
P11M
CY2021Q3 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
575400000 USD
CY2020Q3 us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
1360900000 USD
us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
2028100000 USD
us-gaap Proceeds From Sale And Maturity Of Available For Sale Securities
ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities
5240700000 USD
CY2021Q3 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
100000 USD
CY2020Q3 us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
1000000.0 USD
us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
400000 USD
us-gaap Debt Securities Available For Sale Realized Gain
DebtSecuritiesAvailableForSaleRealizedGain
12800000 USD
CY2021Q3 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
500000 USD
CY2020Q3 us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
900000 USD
us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
1700000 USD
us-gaap Debt Securities Available For Sale Realized Loss
DebtSecuritiesAvailableForSaleRealizedLoss
25200000 USD
CY2021Q3 biib Unrealized Gain Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGainLossesOnForeignCurrencyDerivativesNetBeforeTax
21900000 USD
CY2021Q3 biib Unrealized Gross Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGrossLossesOnForeignCurrencyDerivativesNetBeforeTax
38400000 USD
CY2021Q3 biib Unrealized Gross Gains On Foreign Currency Derivatives Net Before Tax
UnrealizedGrossGainsOnForeignCurrencyDerivativesNetBeforeTax
16500000 USD
CY2020Q4 biib Unrealized Gain Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGainLossesOnForeignCurrencyDerivativesNetBeforeTax
-212500000 USD
CY2021Q3 biib Unrealized Gain Losses On Foreign Currency Derivatives Net Before Tax
UnrealizedGainLossesOnForeignCurrencyDerivativesNetBeforeTax
21900000 USD
CY2021Q3 us-gaap Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments
GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
-13500000 USD
us-gaap Gain Loss On Foreign Currency Derivative Instruments Not Designated As Hedging Instruments
GainLossOnForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
-26100000 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
CY2021Q3 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
1944200000 USD
CY2020Q4 us-gaap Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
1782300000 USD
CY2021Q3 us-gaap Depreciation
Depreciation
65100000 USD
us-gaap Depreciation
Depreciation
168700000 USD
CY2020Q3 us-gaap Depreciation
Depreciation
51500000 USD
us-gaap Depreciation
Depreciation
151200000 USD
CY2021Q1 us-gaap Repayments Of Senior Debt
RepaymentsOfSeniorDebt
151800000 USD
us-gaap Payments Of Financing Costs
PaymentsOfFinancingCosts
24400000 USD
CY2020Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-299000000.0 USD
us-gaap Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
99400000 USD
us-gaap Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
63000000.0 USD
us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
162400000 USD
CY2021Q3 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-136600000 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
CY2021Q3 us-gaap Net Income Loss
NetIncomeLoss
329200000 USD
CY2020Q3 us-gaap Net Income Loss
NetIncomeLoss
701500000 USD
us-gaap Net Income Loss
NetIncomeLoss
1187900000 USD
us-gaap Net Income Loss
NetIncomeLoss
3642700000 USD
CY2021Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
148000000.0 shares
CY2020Q3 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
156900000 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
149900000 shares
us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
163400000 shares
CY2021Q3 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
600000 shares
CY2020Q3 us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
300000 shares
us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
400000 shares
us-gaap Weighted Average Number Diluted Shares Outstanding Adjustment
WeightedAverageNumberDilutedSharesOutstandingAdjustment
300000 shares
CY2021Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
148600000 shares
CY2020Q3 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
157200000 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
150300000 shares
us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
163700000 shares
CY2021Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
62100000 USD
CY2020Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
39600000 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
200000000.0 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
161500000 USD
CY2021Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1900000 USD
CY2020Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1900000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
6300000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
4900000 USD
CY2021Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
60200000 USD
CY2020Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
37700000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
193700000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
156600000 USD
CY2021Q3 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
10900000 USD
CY2020Q3 us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
5400000 USD
us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
35800000 USD
us-gaap Employee Service Share Based Compensation Tax Benefit From Compensation Expense
EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
25700000 USD
CY2021Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
62100000 USD
CY2020Q3 us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
39600000 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
200000000.0 USD
us-gaap Allocated Share Based Compensation Expense Net Of Tax
AllocatedShareBasedCompensationExpenseNetOfTax
161500000 USD
CY2021Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1900000 USD
CY2020Q3 us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
1900000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
6300000 USD
us-gaap Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount
EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount
4900000 USD
CY2021Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
60200000 USD
CY2020Q3 biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
37700000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
193700000 USD
biib Share Based Compensation Expense Included In Costs And Expenses
ShareBasedCompensationExpenseIncludedInCostsAndExpenses
156600000 USD
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
0.210
CY2020Q3 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
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.003
CY2020Q3 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
0.009
us-gaap Effective Income Tax Rate Reconciliation State And Local Income Taxes
EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
0.006
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.202
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.030
us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.115
us-gaap Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential
EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential
-0.036
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.071
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.023
us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.041
us-gaap Effective Income Tax Rate Reconciliation Tax Credits
EffectiveIncomeTaxRateReconciliationTaxCredits
0.013
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
-0.062
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
0.029
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
-0.014
us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Depreciation And Amortization
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepreciationAndAmortization
0.008
CY2020Q3 us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-128600000 USD
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
0
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Nondeductible Expense Impairment Losses
EffectiveIncomeTaxRateReconciliationNondeductibleExpenseImpairmentLosses
0.035
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
CY2021Q3 biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.026
CY2020Q3 biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.022
biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.016
biib Effective Tax Rate Reconciliation Gilt Itax
EffectiveTaxRateReconciliationGILTItax
0.013
CY2021Q3 biib Effective Tax Rate Reconciliation Nuer Immune Tax Impacts
EffectiveTaxRateReconciliationNuerImmuneTaxImpacts
-0.005
CY2020Q3 biib Effective Tax Rate Reconciliation Nuer Immune Tax Impacts
EffectiveTaxRateReconciliationNuerImmuneTaxImpacts
0.002
biib Effective Tax Rate Reconciliation Nuer Immune Tax Impacts
EffectiveTaxRateReconciliationNuerImmuneTaxImpacts
-0.364
biib Effective Tax Rate Reconciliation Nuer Immune Tax Impacts
EffectiveTaxRateReconciliationNuerImmuneTaxImpacts
-0.001
CY2021Q3 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.012
CY2020Q3 us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
-0.003
us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.007
us-gaap Effective Income Tax Rate Reconciliation Other Adjustments
EffectiveIncomeTaxRateReconciliationOtherAdjustments
0.003
CY2021Q3 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
-0.089
CY2020Q3 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.251
us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
-0.292
us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.209
CY2021Q3 us-gaap Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
500000000 USD
CY2021Q2 us-gaap Deferred Tax Assets Gross
DeferredTaxAssetsGross
875000000 USD
CY2021Q2 us-gaap Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
375000000 USD
CY2021Q2 us-gaap Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
375000000 USD
CY2021Q3 us-gaap Investment Income Interest
InvestmentIncomeInterest
2600000 USD
CY2020Q3 us-gaap Investment Income Interest
InvestmentIncomeInterest
6000000.0 USD
us-gaap Investment Income Interest
InvestmentIncomeInterest
8200000 USD
us-gaap Investment Income Interest
InvestmentIncomeInterest
38000000.0 USD
CY2021Q3 us-gaap Interest Expense
InterestExpense
66300000 USD
us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
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CY2020Q3 us-gaap Interest Expense
InterestExpense
56300000 USD
us-gaap Interest Expense
InterestExpense
187300000 USD
us-gaap Interest Expense
InterestExpense
166500000 USD
CY2021Q3 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-424500000 USD
CY2020Q3 us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-82100000 USD
us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-707200000 USD
us-gaap Realized Investment Gains Losses
RealizedInvestmentGainsLosses
-52600000 USD
CY2021Q3 us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-13700000 USD
CY2020Q3 us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
3100000 USD
us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-23100000 USD
us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-5400000 USD
CY2021Q3 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-1000000.0 USD
CY2020Q3 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
700000 USD
us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
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us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
400000 USD
CY2021Q3 us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-502900000 USD
us-gaap Nonoperating Income Expense
NonoperatingIncomeExpense
-186100000 USD
CY2021Q3 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-426900000 USD
CY2021Q3 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
2700000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-82300000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
0 USD
us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-715200000 USD
us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
9300000 USD
us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-40300000 USD
us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
0 USD
CY2021Q3 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-424200000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-82300000 USD
us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-705900000 USD
us-gaap Equity Securities Fv Ni Gain Loss
EquitySecuritiesFvNiGainLoss
-40300000 USD
CY2021Q3 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
2700000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
0 USD
us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
9300000 USD
us-gaap Equity Securities Fv Ni Realized Gain Loss
EquitySecuritiesFvNiRealizedGainLoss
0 USD
CY2021Q3 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-426900000 USD
CY2020Q3 us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-82300000 USD
us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-715200000 USD
us-gaap Equity Securities Fv Ni Unrealized Gain Loss
EquitySecuritiesFvNiUnrealizedGainLoss
-40300000 USD
CY2021Q3 biib Collaborationexpensesaccrual
Collaborationexpensesaccrual
289300000 USD
CY2020Q4 biib Collaborationexpensesaccrual
Collaborationexpensesaccrual
389900000 USD
CY2021Q3 us-gaap Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
299200000 USD
CY2020Q4 us-gaap Employee Related Liabilities Current
EmployeeRelatedLiabilitiesCurrent
333800000 USD
CY2021Q3 us-gaap Accrued Royalties Current
AccruedRoyaltiesCurrent
238900000 USD
CY2020Q4 us-gaap Accrued Royalties Current
AccruedRoyaltiesCurrent
218500000 USD
CY2021Q3 us-gaap Construction Payable Current And Noncurrent
ConstructionPayableCurrentAndNoncurrent
27700000 USD
CY2020Q4 us-gaap Construction Payable Current And Noncurrent
ConstructionPayableCurrentAndNoncurrent
181500000 USD
CY2021Q3 us-gaap Business Combination Contingent Consideration Liability Current
BusinessCombinationContingentConsiderationLiabilityCurrent
0 USD
CY2020Q4 us-gaap Business Combination Contingent Consideration Liability Current
BusinessCombinationContingentConsiderationLiabilityCurrent
149600000 USD
CY2021Q3 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
713200000 USD
CY2020Q4 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
791400000 USD
CY2021Q3 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
2550700000 USD
CY2020Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
3145300000 USD
CY2021Q3 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1318200000 USD
CY2020Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1329600000 USD
CY2021Q3 us-gaap Accrued Income Taxes Noncurrent
AccruedIncomeTaxesNoncurrent
657600000 USD
CY2020Q4 us-gaap Accrued Income Taxes Noncurrent
AccruedIncomeTaxesNoncurrent
709900000 USD
CY2021Q3 us-gaap Deferred Tax Assets Liabilities Net
DeferredTaxAssetsLiabilitiesNet
500000000 USD
CY2021Q2 us-gaap Deferred Tax Assets Gross
DeferredTaxAssetsGross
875000000 USD
CY2021Q2 us-gaap Deferred Tax Assets Valuation Allowance
DeferredTaxAssetsValuationAllowance
375000000 USD
CY2021Q3 biib Investment In Biotechnology Companies That Are Determined To Be Unconsolidated Variable Interest Entities
InvestmentInBiotechnologyCompaniesThatAreDeterminedToBeUnconsolidatedVariableInterestEntities
17200000 USD
CY2020Q4 biib Investment In Biotechnology Companies That Are Determined To Be Unconsolidated Variable Interest Entities
InvestmentInBiotechnologyCompaniesThatAreDeterminedToBeUnconsolidatedVariableInterestEntities
12800000 USD
CY2021Q3 us-gaap Loss Contingency Estimate Of Possible Loss
LossContingencyEstimateOfPossibleLoss
981100000 USD
CY2019Q4 us-gaap Loss Contingency Estimate Of Possible Loss
LossContingencyEstimateOfPossibleLoss
200000000 USD

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