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Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2020
Property, Plant and Equipment [Abstract]  
Classification of Property, Plant and Equipment
A summary of property, plant and equipment by classification is as follows:
Depreciable
Life
March 31, 2020December 31, 2019
  (millions)
Gathering and transmission systems
20 — 50 Years
$7,677  $8,406  
Processing, storage and terminal facilities
35 — 60 Years
4,873  5,305  
Other
3 — 30 Years
577  585  
Finance lease assets
4 — 7 Years
21  25  
Construction work in progress194  183  
Property, plant and equipment13,342  14,504  
Accumulated depreciation(5,162) (5,693) 
Property, plant and equipment, net$8,180  $8,811