LEASES (Tables)

12 Months Ended

Dec. 31, 2019

Leases [Abstract]

Other Information Related to Operating Leases [Table Text Block]

	December 31,
Other information related to operating leases	2019
	(Millions of dollars)
Weighted-average remaining lease term	7 years
Weighted-average discount rate	3.62%
Supplemental cash flows information
Lease payments	$	(8.4	)
Right-of-use assets obtained in exchange for lease obligations	$	9.5

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

	December 31,
Future minimum lease payments under non-cancellable operating leases	2019
	(Millions of dollars)
2020	$	7.6
2021	7.2
2022	6.9
2023	5.8
2024	3.1
Thereafter	8.5
Total future minimum lease payments	$	39.1
Imputed interest	(4.6		)
Total operating lease liability	$	34.5
Consolidated balance sheets as of December 31, 2019
Current operating lease liability	$	6.5
Long-term operating lease liability	28.0
Total operating lease liability	$	34.5

Schedule of Future Minimum Rental Payments for Operating Leases Under ASC 840 [Table Text Block]

The following table sets forth the required disclosures for the period prior to adoption of ASC 842:

	December 31,
Future minimum lease payments under non-cancellable operating leases	2018
	(Millions of dollars)
2019	$	6.3
2020	5.1
2021	4.5
2022	4.3
2023	4.2
Thereafter	3.8
Total future minimum lease payments	$	28.2