The estimated useful lives of PP&E by major category are as follows:
Land improvements
15 Years
Buildings
25-39 Years
Building improvements
10-39 Years
Furniture, equipment, and vehicles
3-25 Years
Leasehold improvements
Remaining lease term, or the estimated useful life of the improvement, whichever is shorter
PP&E consists of the following (in millions):
 As of December 31,
 20252024
Land and land improvements$266.5 $181.9 
Buildings, building improvements, and leasehold improvements944.7 863.8 
Buildings under construction592.7 218.2 
Furniture, equipment, and vehicles493.6 449.7 
Subtotal2,297.5 1,713.6 
Less—accumulated depreciation(567.8)(491.2)
PP&E, net$1,729.7 $1,222.4 

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.