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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment [Table Text Block]
As of December 31, 2017 and 2016, our property, plant and equipment, net consisted of the following (in millions):
 
December 31,
 
2017
 
2016
Pipelines (Natural gas, liquids, crude oil and CO2)
$
20,157

 
$
19,341

Equipment (Natural gas, liquids, crude oil, CO2, and terminals)
24,152

 
23,298

Other(a)
5,570

 
4,780

Accumulated depreciation, depletion and amortization
(14,175
)
 
(12,306
)
 
35,704

 
35,113

Land and land rights-of-way
1,456

 
1,431

Construction work in process
2,995

 
2,161

Property, plant and equipment, net
$
40,155

 
$
38,705


_______
(a) Includes general plant, general structures and buildings, computer and communication equipment, intangibles, vessels, transmix products, linefill and miscellaneous property, plant and equipment.