Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2019

Employee Benefits

Schedule of Plans' assets measured at estimated fair value

	December 31,
(Millions of dollars)	2019		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	84	$	84	$	—	$	—
Foreign equity securities		57		57		—		—
Domestic fixed income mutual funds		30		30		—		—
Foreign fixed income mutual funds		12		12		—		—
Money market funds		2		2		—		—
Total assets	$	185	$	185	$	—	$	—

	December 31,
(Millions of dollars)	2018		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	69	$	69	$	—	$	—
Foreign equity securities		47		47		—		—
Domestic fixed income mutual funds		27		27		—		—
Foreign fixed income mutual funds		11		11		—		—
Money market funds		2		2		—		—
Total assets	$	156	$	156	$	—	$	—

Schedule of assumptions used in determining pension information for plans

	Years ended December 31,
	2019				2018				2017
Weighted average assumptions
Discount rate used to determine obligations	2.15	-	3.50	%	3.50	-	4.50	%	2.75	-	3.80	%
Discount rate used to determine net periodic benefit cost	3.50	-	4.50	%	2.75	-	3.80	%	2.90	-	4.60	%
Expected return on plan assets			6.25	%			6.25	%			6.50	%
Long-term rate of increase in compensation levels			4.00	%			4.00	%			4.00	%

Schedule of the funded status

	December 31,
(Millions of dollars)		2019	2018
Reconciliation of benefit obligation:
Benefit obligation at beginning of year	$	293	$	300
Service cost		8		10
Interest cost		12		11
Actuarial losses (gains)		50		(22)
Plan settlements		(9)		—
Benefits paid		(9)		(6)
Other		3		—
Benefit obligation at end of year	$	348	$	293
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	$	156	$	171
Actual return on plan assets		35		(11)
Employer contributions		9		2
Plan settlements		(9)		—
Benefits paid		(6)		(6)
Fair value of plan assets at end of year	$	185	$	156
Funded status	$	(163)	$	(137)

Schedule of net periodic benefit cost of plans

	Years ended December 31,
(Millions of dollars)	2019		2018		2017
Components of net periodic benefit cost:
Service cost	$	8	$	10	$	9
Interest cost		12		11		11
Expected return on plan assets		(10)		(11)		(10)
Amortization		5		6		5
Settlement loss recognized		2		—		2
Net periodic benefit cost	$	17	$	16	$	17