Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2018

Employee Benefits

Schedule of Plans' assets measured at estimated fair value

	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	$	—	$	—

	December 31,
(Millions of dollars)	2017		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	80	$	80	$	—	$	—
Foreign equity securities		53		53		—		—
Domestic fixed income mutual funds		25		25		—		—
Foreign fixed income mutual funds		11		11		—		—
Money market funds		2		2		—		—
Total assets	$	171	$	171	$	—	$	—

Schedule of assumptions used in determining pension information for plans

	Years ended December 31,
	2018				2017				2016
Weighted average assumptions
Discount rate used to determine obligations	3.50	-	4.50	%	2.75	-	3.80	%	2.90	-	4.65	%
Discount rate used to determine net periodic benefit cost	2.75	-	3.80	%	2.90	-	4.60	%	3.20	-	4.80	%
Expected return on plan assets			6.25	%			6.50	%	6.75	-	7.00	%
Long-term rate of increase in compensation levels			4.00	%			4.00	%			4.00	%

Schedule of the funded status

	December 31,
(Millions of dollars)		2018	2017
Reconciliation of benefit obligation:
Benefit obligation at beginning of year	$	300	$	262
Service cost		10		9
Interest cost		11		11
Actuarial losses (gains)		(22)		29
Plan settlements		—		(9)
Benefits paid		(6)		(3)
Other		—		1
Benefit obligation at end of year	$	293	$	300
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	$	171	$	151
Actual return on plan assets		(11)		25
Employer contributions		2		10
Plan settlements		—		(9)
Benefits paid		(6)		(6)
Fair value of plan assets at end of year	$	156	$	171
Funded status	$	(137)	$	(129)

Schedule of net periodic benefit cost of plans

	Years ended December 31,
(Millions of dollars)	2018		2017		2016
Components of net periodic benefit cost:
Service cost	$	10	$	9	$	9
Interest cost		11		11		11
Expected return on plan assets		(11)		(10)		(8)
Amortization and other		6		5		5
Settlement loss recognized		—		2		—
Net periodic benefit cost	$	16	$	17	$	17