Depreciation is generally calculated using the straight-line method over the following estimated useful life of the assets:
Years
Buildings and improvements
10-40
Plant equipment
10-40
Other machinery and equipment
5-7
Land improvements
15-40
Railroad track and equipment
20-30
Computer hardware and software
3-5
Office furniture and equipment
5-7

Historical Timeline

Fiscal YearFiled
2025Feb 10, 2026Showing above
2024Feb 7, 2025
2023Feb 9, 2024
2022Feb 10, 2023
2021Feb 18, 2022
2020Feb 16, 2021
2019Feb 20, 2020
2018Feb 20, 2019
2017Feb 14, 2018
2016Feb 22, 2017
2015Feb 18, 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.