Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2021

Employee Benefits

Schedule of Plans' assets measured at estimated fair value

	December 31,
(Millions of dollars)	2021		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	113	$	113	$	—	$	—
Foreign equity securities		71		71		—		—
Domestic fixed income mutual funds		29		29		—		—
Foreign fixed income mutual funds		12		12		—		—
Money market funds		2		2		—		—
Total assets	$	227	$	227	$	—	$	—

	December 31,
(Millions of dollars)	2020		Level 1		Level 2		Level 3
Assets:
Domestic equity securities	$	93	$	93	$	—	$	—
Foreign equity securities		64		64		—		—
Domestic fixed income mutual funds		32		32		—		—
Foreign fixed income mutual funds		15		15		—		—
Money market funds		2		2		—		—
Total assets	$	206	$	206	$	—	$	—

Schedule of assumptions used in determining pension information for plans

	Years ended December 31,
	2021				2020				2019
Weighted average assumptions:
Discount rate used to determine obligations	1.20	-	2.90	%	0.70	-	2.60	%	2.15	-	3.50	%
Discount rate used to determine net periodic benefit cost	0.70	-	2.60	%	2.15	-	3.50	%	3.50	-	4.50	%
Expected return on plan assets			6.25	%			6.25	%			6.25	%
Long-term rate of increase in compensation levels			4.00	%			4.00	%			4.00	%

Schedule of changes in the benefit obligation and fair value of assets for the qualified and nonqualified plans and the funded status

	December 31,
		2021	2020
(Millions of dollars)		Accumulated benefits exceed assets		Accumulated benefits exceed assets
Reconciliation of benefit obligation:
Benefit obligation at beginning of year	$	379	$	348
Service cost		10		9
Interest cost		9		11
Actuarial losses (gains)		(10)		58
Plan settlements		(19)		(38)
Benefits paid		(7)		(9)
Benefit obligation at end of year	$	362	$	379
Reconciliation of fair value of plan assets:
Fair value of plan assets at beginning of year	$	206	$	185
Actual return on plan assets		27		27
Employer contributions		20		38
Plan settlements		(19)		(38)
Benefits paid		(7)		(6)
Fair value of plan assets at end of year	$	227	$	206
Funded status	$	(135)	$	(173)

Schedule of net periodic benefit cost for all plans

	Years ended December 31,
(Millions of dollars)	2021		2020		2019
Components of net periodic benefit cost:
Service cost	$	10	$	9	$	8
Interest cost		9		11		12
Expected return on plan assets		(12)		(11)		(10)
Amortization		9		7		5
Settlement loss recognized		6		11		2
Net periodic benefit cost	$	22	$	27	$	17