Depreciation is computed using the straight-line method over the following estimated useful lives:

Buildings and improvements:
Buildings and improvements
2 to 40 years
Leasehold improvements
1 to 39 years
Machinery and equipment:
Computer hardware
3 to 5 years
Computer software
3 to 10 years
Factory machinery and equipment
1 to 15 years
Research and development equipment
3 to 5 years
Vehicles
3 to 10 years
Components of Property, plant and equipment, net were as follows (in millions):
As of December 31,
20252024
Land$46.4 $30.3 
Buildings and improvements475.1 427.8 
Machinery and equipment1,192.2 1,056.6 
Finance leases108.4 84.9 
Construction in progress and equipment not yet in service109.0 157.3 
Total1,931.1 1,756.9 
Less accumulated depreciation(1,043.9)(956.8)
Property, plant and equipment, net$887.2 $800.1 

Historical Timeline

Fiscal YearFiled
2025Feb 17, 2026Showing above
2024Feb 11, 2025
2023Feb 13, 2024
2022Feb 21, 2023
2021Feb 15, 2022
2020Feb 16, 2021
2019Feb 18, 2020
2018Feb 19, 2019
2017Feb 16, 2018
2016Feb 21, 2017
2015Feb 16, 2016

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.