EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2019

Pension and Other Postretirement Benefit Plans

Schedule of Net Benefit Costs [Table Text Block]

Millions of dollars	Pension Benefits						Other Postretirement Benefits
Three months ended March 31,	2019			2018			2019		2018
Service cost	$	4		$	4		$	1	$	1
Interest cost	8			7			2		2
Expected return on assets	(10		)	(12		)	—		—
Amortization of actuarial losses	4			3			—		—
Net periodic benefit cost	$	6		$	2		$	3	$	3