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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Future Minimum Rental Payments for Firm Transportation, Storage Contracts and Capital Leases The following table sets forth our firm transportation and storage contract payments for the periods indicated:
 
 
Firm
Transportation
and Storage
Contracts
 
 
(Millions of dollars)
2020
 
$
61.6

2021
 
48.1

2022
 
40.1

2023
 
36.4

2024
 
34.3

Thereafter
 
177.9

Total
 
$
398.4