The components of properties, plants and equipment are as follows:
December 31,
20252024
(In millions)
Land, buildings and improvements$814 $790 
Refining facilities7,041 6,793 
Pipelines and terminals2,402 2,356 
Transportation vehicles44 42 
Other fixed assets690 640 
Construction in progress401 310 
Properties, plants and equipment, at cost11,392 10,931 
Less: accumulated depreciation(4,859)(4,373)
Properties, plants and equipment, net$6,533 $6,558 

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.