COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Rental Payments for Firm Transportation, Storage Contracts and Capital Leases

The following table sets forth our capital lease future minimum payments and our firm transportation and storage contract payments for the periods indicated:

	Capital Lease (a)		Firm Transportation and Storage Contracts
	(Millions of dollars)
2019	$	4.5	$	63.7
2020	4.5		51.6
2021	4.5		35.7
2022	4.5		22.4
2023	4.5		17.3
Thereafter	21.6		11.7
Total	$	44.1	$	202.4
(a) - At December 31, 2018, $28 million in principal represents noncash financing activities.