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LEASES (Tables)
6 Months Ended
Jun. 30, 2019
Leases [Abstract]  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
The following table sets forth the maturity of our lease liabilities as of June 30, 2019:
 
 
Finance
Lease
 
Operating
Leases
 
 
(Millions of dollars)
Remainder of 2019
 
$
2.2

 
$
4.3

2020
 
4.5

 
2.2

2021
 
4.5

 
1.9

2022
 
4.5

 
1.8

2023
 
4.5

 
1.8

2024 and beyond
 
21.6

 
10.1

Total lease payments
 
41.8

 
22.1

Less: Interest
 
14.7

 
4.5

Present value of lease liabilities
 
$
27.1

 
$
17.6


Lease Assets and Liabilities Included in the Consolidated Balance Sheet[Table Text Block]
The following table sets forth information about our lease assets and liabilities included in our Consolidated Balance Sheet for the period indicated:
Leases
Location in our Consolidated Balance Sheet
 
June 30, 2019
 
 
 
(Thousands of dollars)
Assets
 
 
 
Operating leases
Other assets
 
$
17,406

Finance lease
Property, plant and equipment
 
28,286

Finance lease
Accumulated depreciation
 
(754
)
Total leased assets
 
 
$
44,938

 
 
 
 
Liabilities
 
 
 
Current
 
 
 
Operating leases
Other current liabilities
 
$
3,660

Finance lease
Finance lease liability
 
1,854

Noncurrent
 
 
 
Operating leases
Other deferred credits
 
13,964

Finance lease
Finance lease liability
 
25,294

Total lease liabilities
 
 
$
44,772



The following table sets forth information about our supplemental cash flows:
 
 
Six Months Ended
 
 
June 30, 2019
 
 
(Thousands of dollars)
Cash paid for amounts included in the measurement of lease liabilities
 
 
Operating cash flows for operating leases
 
$
3,300

Financing cash flows for finance lease
 
$
860

Right-of-use assets obtained in exchange for operating lease liabilities (noncash)
 
$
3,041


Lease, Cost [Table Text Block]
The following table sets forth information about our leases for the periods indicated:
 
 
Three Months
Ended
June 30, 2019
 
Six Months
Ended
June 30, 2019
At June 30, 2019
 
Location in our
Consolidated
Statement of Income
Lease Cost
Weighted-Average
Remaining
Lease Term
 
Weighted-Average
Discount
Rate (a)
 
 
(Thousands of dollars)
(Years)
 
 
Operating leases
Operations and maintenance
$
1,921

 
$
3,651

9.8
 
4.58%
Finance lease
 


 
 
9.3
 
10.00%
Amortization of lease assets
Depreciation and amortization
283

 
566

 
 
 
Interest on lease liabilities
Interest expense
686

 
1,383

 
 
 
Total lease cost
 
$
2,890

 
$
5,600

 
 
 
(a) - Our weighted-average discount rates represent the rate implicit in the lease or our incremental borrowing rate for a term equal to the remaining term of the lease.
Finance Lease, Liability, Maturity [Table Text Block]
The following table sets forth the maturity of our lease liabilities as of June 30, 2019:
 
 
Finance
Lease
 
Operating
Leases
 
 
(Millions of dollars)
Remainder of 2019
 
$
2.2

 
$
4.3

2020
 
4.5

 
2.2

2021
 
4.5

 
1.9

2022
 
4.5

 
1.8

2023
 
4.5

 
1.8

2024 and beyond
 
21.6

 
10.1

Total lease payments
 
41.8

 
22.1

Less: Interest
 
14.7

 
4.5

Present value of lease liabilities
 
$
27.1

 
$
17.6