Biogen Inc. (BIIB)

Property, plant and equipment are carried at cost, subject to review for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. The cost of normal, recurring, or periodic repairs and maintenance activities related to property, plant and equipment are expensed as incurred. The cost for planned major maintenance activities, including the related acquisition or construction of assets, is capitalized if the repair will result in future economic benefits.

Interest costs incurred during the construction of major capital projects are capitalized until the underlying asset is ready for its intended use, at which point the interest costs are amortized as depreciation expense over the life of the underlying asset. Biogen also capitalizes certain direct and incremental costs associated with the validation effort required for licensing by regulatory agencies of new manufacturing equipment for the production of a commercially approved drug. These costs primarily include direct labor and material and are incurred in preparing the equipment for its intended use. The validation costs are either amortized over the life of the related equipment or expensed as cost of sales when the product produced in the validation process is sold.

In addition, Biogen capitalizes certain internal use computer software development costs. If the software is an integral part of production assets, these costs are included in machinery and equipment and are amortized on a straight-line basis over the estimated useful lives of the related software, which generally range from three to five years.

Biogen generally depreciates or amortizes the cost of the property, plant and equipment using the straight-line method over the estimated useful lives of the respective assets, which are summarized as follows:

Asset Category	Useful Lives
Land	Not depreciated
Buildings	15 to 40 years
Leasehold Improvements	Lesser of the useful life or the term of the respective lease
Furniture and Fixtures	5 to 7 years
Machinery and Equipment	5 to 20 years
Computer Software and Hardware	3 to 5 years

When Biogen disposes of property, plant and equipment, Biogen removes the associated cost and accumulated depreciation from the related accounts in the consolidated balance sheets and includes any resulting gain or loss in the consolidated statements of income.

Source: Biogen Inc., Annual Report

Biogen Inc., Statement of Financial Position, Property, Plant and Equipment

USD $ in thousands

Source: Based on data from Biogen Inc. Annual Reports

Item	Description	The company
Land	Carrying amount as of the balance sheet date of real estate held for productive use. This excludes land held for sale.	Biogen Inc.'s land increased from 2015 to 2016 and from 2016 to 2017.
Buildings	Carrying amount as of the balance sheet date of long-lived, depreciable assets that include building structures held for productive use including any addition, improvement, or renovation to the structure, such as interior masonry, interior flooring, electrical, and plumbing.	Biogen Inc.'s buildings increased from 2015 to 2016 and from 2016 to 2017.
Leasehold improvements	Carrying amount at the balance sheet date of long-lived, depreciable asset that is an addition or improvement to assets held under lease arrangement.	Biogen Inc.'s leasehold improvements declined from 2015 to 2016 and from 2016 to 2017.
Machinery and equipment	Carrying amount as of the balance sheet date of long-lived, depreciable asset used in production process to produce goods and services.	Biogen Inc.'s machinery and equipment increased from 2015 to 2016 and from 2016 to 2017.
Furniture and fixtures	Carrying amount at the balance sheet date for long-lived, depreciable asset commonly used in offices and stores. Examples include desks, chairs, and store fixtures.	Biogen Inc.'s furniture and fixtures declined from 2015 to 2016 and from 2016 to 2017.
Construction in progress	Carrying amount at the balance sheet date of long-lived asset under construction that include construction costs to date on capital projects that have not been completed and assets being constructed that are not ready to be placed into service.	Biogen Inc.'s construction in progress increased from 2015 to 2016 and from 2016 to 2017.
Property, plant and equipment, cost	Carrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, physical structures, machinery, vehicles, furniture, computer equipment, construction in progress, and similar items. Amount does not include depreciation.	Biogen Inc.'s property, plant and equipment, cost increased from 2015 to 2016 and from 2016 to 2017.
Property, plant and equipment, net	Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, and production equipment.	Biogen Inc.'s property, plant and equipment, net increased from 2015 to 2016 and from 2016 to 2017.

Biogen Inc., Property, Plant and Equipment Ratios

Ratio	Description	The company
Average age	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company's fixed asset base is old or new. Newer assets are likely to be more efficient.	Biogen Inc.'s average age of depreciable property, plant and equipment improved from 2015 to 2016 and from 2016 to 2017.
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company's depreciation policy and can be used for comparisons with competitors.	Biogen Inc.'s estimated total useful life of depreciable property, plant and equipment declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.
Estimated time elapsed since purchase	The approximate age in years of a company's fixed assets. Useful for comparison purposes.	Biogen Inc.'s estimated time elapsed since purchase of depreciable property, plant and equipment improved from 2015 to 2016 but then slightly deteriorated from 2016 to 2017 not reaching 2015 level.
Estimated remaining life		Biogen Inc.'s estimated remaining life of depreciable property, plant and equipment declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.

2017 Calculations

Ratio	Description	The company
Average age	As long as straight-line depreciation is used, this is an accurate estimate of asset age as a percentage of depreciable life. The relative age is a useful measure of whether the company's fixed asset base is old or new. Newer assets are likely to be more efficient.	Biogen Inc.'s average age of depreciable property, plant and equipment improved from 2015 to 2016 and from 2016 to 2017.

2017 Calculations

Ratio	Description	The company
Estimated total useful life	Over longer time periods, this ratio is a useful measure of company's depreciation policy and can be used for comparisons with competitors.	Biogen Inc.'s estimated total useful life of depreciable property, plant and equipment declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.

2017 Calculations

Ratio	Description	The company
Estimated time elapsed since purchase	The approximate age in years of a company's fixed assets. Useful for comparison purposes.	Biogen Inc.'s estimated time elapsed since purchase of depreciable property, plant and equipment improved from 2015 to 2016 but then slightly deteriorated from 2016 to 2017 not reaching 2015 level.

2017 Calculations

Ratio	Description	The company
Estimated remaining life		Biogen Inc.'s estimated remaining life of depreciable property, plant and equipment declined from 2015 to 2016 but then increased from 2016 to 2017 exceeding 2015 level.