Rendering

Component: (Network and Table)
Network
2413402 - Disclosure - Property, Plant and Equipment (Details)
(http://www.biogenidec.com/role/PropertyPlantAndEquipmentDetails)
Table(Implied)
Slicers (applies to each fact value in each table cell)
Reporting Entity [Axis]0000875045 (http://www.sec.gov/CIK)
Property, Plant and Equipment [Abstract]Period [Axis]
2016-12-31
2015-12-31
Property, Plant and Equipment [Abstract]
 
 
Land
137,800,000  
74,700,000  
Buildings
1,107,800,000  
1,035,600,000  
Leasehold improvements
123,700,000  
166,600,000  
Machinery and equipment
1,105,800,000  
1,079,600,000  
Computer software and hardware
746,800,000  
647,100,000  
Furniture and fixtures
60,600,000  
72,900,000  
Construction in progress
658,600,000  
441,200,000  
Total cost
3,941,100,000  
 
3,517,700,000  
 
Less: accumulated depreciation
(1,439,300,000) 
(1,330,100,000) 
Total property, plant and equipment, net
2,501,800,000  
 
2,187,600,000