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Inventories
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories

Inventories consist of the following:
 
 
December 31,
(In millions)
 
2019
 
2018
NGLs
 
$
5

 
$
9

Line fill
 
10

 
9

Spare parts, materials and supplies
 
95

 
80

Total inventories
 
$
110

 
$
98