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LEASES (Tables)
12 Months Ended
Dec. 31, 2019
Leases [Abstract]  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
The following table sets forth the maturity of our lease liabilities as of December 31, 2019:
 
 
Finance
Lease
 
Operating
Leases
 
 
(Millions of dollars)
2020
 
$
4.5

 
$
2.5

2021
 
4.5

 
2.1

2022
 
4.5

 
2.0

2023
 
4.5

 
1.9

2024
 
4.5

 
1.9

2025 and beyond
 
17.1

 
9.2

Total lease payments
 
39.6

 
19.6

Less: Interest
 
13.4

 
4.2

Present value of lease liabilities
 
$
26.2

 
$
15.4


LeaseAssetsAndLiabilitiesInBalanceSheet [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
 
December 31, 2019
 
 
 
(Thousands of dollars)
Assets
 
 
 
Operating leases
Other assets
 
$
15,147

Finance lease
Property, plant and equipment
 
28,286

Finance lease
Accumulated depreciation
 
(1,320
)
Total leased assets
 
 
$
42,113

 
 
 
 
Liabilities
 
 
 
Current
 
 
 
Operating leases
Other current liabilities
 
$
1,883

Finance lease
Finance lease liability
 
1,949

Noncurrent
 
 
 
Operating leases
Other deferred credits
 
13,509

Finance lease
Finance lease liability
 
24,296

Total lease liabilities
 
 
$
41,637



The following table sets forth supplemental information about our cash flows:
 
 
Year Ended
 
 
December 31, 2019
 
 
(Thousands of dollars)
Cash paid for amounts included in the measurement of lease liabilities
 
 
Operating cash flows for operating leases
 
$
6,213

Financing cash flows for finance lease
 
$
1,764

Right-of-use assets obtained in exchange for operating lease liabilities (noncash)
 
$
4,097


Lease, Cost [Table Text Block]
The following table sets forth information about our leases for the period indicated:
 
 
 
Year Ended December 31, 2019
At December 31, 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
 
$
6,803

10.4
 
4.58%
Finance lease
 
 
 
8.8
 
10.00%
Amortization of lease assets
Depreciation and amortization
 
1,131

 
 
 
Interest on lease liabilities
Interest expense
 
2,721

 
 
 
Total lease cost
 
 
$
10,655

 
 
 
(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 December 31, 2019:
 
 
Finance
Lease
 
Operating
Leases
 
 
(Millions of dollars)
2020
 
$
4.5

 
$
2.5

2021
 
4.5

 
2.1

2022
 
4.5

 
2.0

2023
 
4.5

 
1.9

2024
 
4.5

 
1.9

2025 and beyond
 
17.1

 
9.2

Total lease payments
 
39.6

 
19.6

Less: Interest
 
13.4

 
4.2

Present value of lease liabilities
 
$
26.2

 
$
15.4