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Related Party Transactions (Notes)
 9 Months Ended
Sep. 30, 2019
Related Party Transactions [Abstract]  
Related Party Transactions Related Party Transactions
Our related party transactions consist primarily of transactions with our equity method investees (See Note 6 ). Transactions with our related parties were as follows for the periods presented:
 
 
Three Months Ended September 30,
 
Nine Months Ended September 30,
(in millions)
 
2019
 
2018
 
2019
 
2018
Revenues (1)
 
$
45.1

 
$
9.0

 
$
73.3

 
$
31.7

Cost of materials and other (2)
 
$
20.3

 
$
4.8

 
$
33.7

 
$
15.7

(1) 
Consists primarily of asphalt sales which are recorded in corporate, other and eliminations segment.
(2) 
Consists primarily of pipeline throughput fees paid by the refining segment and asphalt purchases.