Property, plant and equipment, net consisted of the following as of December 31:

(Millions)Depreciable Lives20252024
LandIndefinite$65.4 $30.6 
Building and improvements
3 - 40 years
537.1 374.7 
Fiber
30 years
6,727.5 5,399.5 
Copper
20 years
4,583.4 3,972.8 
Poles
30 years
474.7 341.5 
Equipment
5 - 7 years
1,898.2 508.8 
Corporate assets
3 - 7 years
204.7 16.4 
Construction in progress597.4 36.8 
 15,088.4 10,681.1 
Less accumulated depreciation (6,946.5)(6,471.4)
Property, plant and equipment, net $8,141.9 $4,209.7 

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.