v3.25.3
Fixed Assets and Asset Retirement Obligations (Fixed Assets, Net) (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost $ 5,358,623,000 $ 5,280,860,000
Less: Accumulated depreciation (1,858,430,000) (1,740,974,000)
Net fixed assets 3,500,193,000 3,539,886,000
Crude oil and natural gas pipelines and related assets    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 3,825,345,000 3,367,908,000
Onshore facilities, machinery and equipment    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 291,797,000 293,436,000
Transportation equipment    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 24,185,000 22,976,000
Marine vessels    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 1,064,148,000 1,062,720,000
Land, buildings and improvements    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 88,579,000 88,545,000
Office equipment, furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 10,441,000 10,101,000
Construction in progress    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost 27,463,000 408,509,000
Other    
Property, Plant and Equipment [Line Items]    
Fixed assets, at cost $ 26,665,000 $ 26,665,000