Rendering

Component: (Network and Table)
Network
2406402 - Disclosure - Restructuring Restructuring (Details)
(http://www.biogenidec.com/role/RestructuringRestructuringDetails)
TableSchedule of Restructuring and Related Costs [Table]
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000875045 (http://www.sec.gov/CIK)
Restructuring Cost and Reserve [Line Items]Period [Axis]
2016-01-01 - 2016-12-31
Restructuring Type [Axis]
Workforce reductionPipeline programsType of Restructuring [Domain]
Restructuring reserve, beginning period
33,700,000  
3,600,000  
37,300,000  
Expense
4,900,000  
5,400,000  
10,300,000  
Payments
(31,200,000) 
(9,000,000) 
(40,200,000) 
Adjustments to previous estimates, net
(5,200,000) 
2,900,000  
(2,300,000) 
Restructuring reserve, ending period
2,200,000  
 
2,900,000  
 
5,100,000